/* =========================================
   USTT Modern Templates Collection
   ========================================= */

/* Button 1: Neon Pulse Circle */
.ustt-btn-1 {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    cursor: pointer;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: 0 0 30px rgba(102, 126, 234, 0.5);
    color: white;
    /* Ensure text color */
}

.ustt-btn-1::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    opacity: 0;
    animation: ustt-pulse 2s infinite;
    z-index: -1;
}

.ustt-btn-1::after {
    content: '↑';
    font-size: 28px;
    font-weight: bold;
    color: white;
}

.ustt-btn-1:hover {
    transform: translateY(-8px) scale(1.1);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.7);
}

@keyframes ustt-pulse {

    0%,
    100% {
        opacity: 0;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

/* Button 2: Neumorphic Minimal */
.ustt-btn-2 {
    width: 65px;
    height: 65px;
    border-radius: 20px;
    background: #e0e5ec;
    border: none;
    cursor: pointer;
    box-shadow: 9px 9px 16px rgba(163, 177, 198, 0.6),
        -9px -9px 16px rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    /* Centers content if needed */
    align-items: center;
    justify-content: center;
}

.ustt-btn-2::after {
    content: '▲';
    position: absolute;
    font-size: 24px;
    color: #667eea;
}

.ustt-btn-2:hover {
    box-shadow: inset 5px 5px 10px rgba(163, 177, 198, 0.5),
        inset -5px -5px 10px rgba(255, 255, 255, 0.5);
}

.ustt-btn-2:active {
    box-shadow: inset 7px 7px 12px rgba(163, 177, 198, 0.6),
        inset -7px -7px 12px rgba(255, 255, 255, 0.4);
}

/* Button 3: Glowing Border Hexagon */
.ustt-btn-3 {
    width: 70px;
    height: 70px;
    background: transparent;
    border: none;
    cursor: pointer;
    position: relative;
    clip-path: polygon(30% 0%, 70% 0%, 100% 50%, 70% 100%, 30% 100%, 0% 50%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-3::before {
    content: '';
    position: absolute;
    inset: 3px;
    background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    clip-path: polygon(30% 0%, 70% 0%, 100% 50%, 70% 100%, 30% 100%, 0% 50%);
    z-index: 1;
}

.ustt-btn-3::after {
    content: '↑';
    position: absolute;
    font-size: 26px;
    color: #00f2fe;
    z-index: 2;
    font-weight: bold;
}

.ustt-btn-3-glow {
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, #4facfe, #00f2fe, #4facfe);
    clip-path: polygon(30% 0%, 70% 0%, 100% 50%, 70% 100%, 30% 100%, 0% 50%);
    animation: ustt-rotate 4s linear infinite;
}

@keyframes ustt-rotate {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Button 4: Glassmorphism Float */
.ustt-btn-4 {
    width: 70px;
    height: 70px;
    border-radius: 25px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-4::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: ustt-shimmer 3s infinite;
}

.ustt-btn-4::after {
    content: '⬆';
    font-size: 28px;
    color: white;
    z-index: 1;
}

.ustt-btn-4:hover {
    transform: translateY(-15px);
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

@keyframes ustt-shimmer {
    0% {
        transform: translateX(-100%) translateY(-100%);
    }

    100% {
        transform: translateX(100%) translateY(100%);
    }
}

/* Button 5: Retro Arcade */
.ustt-btn-5 {
    width: 80px;
    height: 80px;
    border: 4px solid #ff006e;
    background: #000;
    cursor: pointer;
    position: relative;
    font-family: 'Orbitron', monospace;
    font-size: 32px;
    color: #00ff41;
    text-shadow: 0 0 10px #00ff41, 0 0 20px #00ff41;
    box-shadow: inset 0 0 20px rgba(255, 0, 110, 0.5),
        0 0 20px rgba(255, 0, 110, 0.5);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-5::after {
    content: '↑';
}

.ustt-btn-5:hover {
    background: #ff006e;
    color: #000;
    text-shadow: none;
    transform: scale(1.1);
    box-shadow: 0 0 30px #ff006e, inset 0 0 10px #000;
}

.ustt-btn-5:active {
    transform: scale(0.95);
}

/* Button 6: Liquid Morphing */
.ustt-btn-6 {
    width: 70px;
    height: 70px;
    border-radius: 35% 65% 60% 40% / 45% 50% 50% 55%;
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    border: none;
    cursor: pointer;
    transition: all 0.6s ease;
    position: relative;
    animation: ustt-morph 8s ease-in-out infinite;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-6::after {
    content: '↑';
    font-size: 30px;
    font-weight: bold;
    color: white;
}

.ustt-btn-6:hover {
    animation-play-state: paused;
    transform: scale(1.15);
    box-shadow: 0 15px 50px rgba(250, 112, 154, 0.6);
}

@keyframes ustt-morph {

    0%,
    100% {
        border-radius: 35% 65% 60% 40% / 45% 50% 50% 55%;
    }

    25% {
        border-radius: 60% 40% 50% 50% / 55% 45% 55% 45%;
    }

    50% {
        border-radius: 50% 50% 40% 60% / 45% 55% 45% 55%;
    }

    75% {
        border-radius: 45% 55% 55% 45% / 60% 40% 60% 40%;
    }
}

/* Button 7: Brutalist Sharp */
.ustt-btn-7 {
    width: 75px;
    height: 75px;
    background: #fff;
    border: 5px solid #000;
    cursor: pointer;
    font-family: 'Archivo Black', sans-serif;
    font-size: 36px;
    color: #000;
    transition: all 0.1s;
    position: relative;
    box-shadow: 8px 8px 0 #000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-7::after {
    content: '↑';
}

.ustt-btn-7:hover {
    transform: translate(4px, 4px);
    box-shadow: 4px 4px 0 #000;
}

.ustt-btn-7:active {
    transform: translate(8px, 8px);
    box-shadow: 0 0 0 #000;
}

/* Button 8: Gradient Ring Spinner */
.ustt-btn-8 {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: #1a1a2e;
    border: none;
    cursor: pointer;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-8::before {
    content: '';
    position: absolute;
    inset: -5px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, #ff0080, #ff8c00, #40e0d0, #ff0080);
    animation: ustt-spin 3s linear infinite;
    z-index: -1;
}

.ustt-btn-8::after {
    content: '⇡';
    font-size: 32px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-8:hover::before {
    animation-duration: 1s;
}

@keyframes ustt-spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Button 9: 3D Cube Flip */
.ustt-btn-9-container {
    width: 70px;
    height: 70px;
    perspective: 1000px;
}

.ustt-btn-9 {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s;
    cursor: pointer;
}

.ustt-btn-9:hover {
    transform: rotateX(180deg);
}

.ustt-btn-9-face {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: bold;
    backface-visibility: hidden;
    border-radius: 15px;
}

.ustt-btn-9-front {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.ustt-btn-9-back {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    transform: rotateX(180deg);
}

/* Button 10: Particle Burst */
.ustt-btn-10 {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: visible;
    font-size: 28px;
    color: white;
    font-weight: bold;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-10::before,
.ustt-btn-10::after {
    content: '•';
    position: absolute;
    font-size: 20px;
    color: #667eea;
    opacity: 0;
}

.ustt-btn-10:hover {
    transform: scale(1.1);
}

.ustt-btn-10:hover::before {
    animation: ustt-particle1 0.8s ease-out;
}

.ustt-btn-10:hover::after {
    animation: ustt-particle2 0.8s ease-out;
}

@keyframes ustt-particle1 {
    0% {
        top: 50%;
        left: 50%;
        opacity: 1;
        transform: translate(-50%, -50%);
    }

    100% {
        top: -20px;
        left: -20px;
        opacity: 0;
        transform: translate(-50%, -50%) scale(2);
    }
}

@keyframes ustt-particle2 {
    0% {
        top: 50%;
        left: 50%;
        opacity: 1;
        transform: translate(-50%, -50%);
    }

    100% {
        top: -20px;
        left: 90%;
        opacity: 0;
        transform: translate(-50%, -50%) scale(2);
    }
}

/* Button 11: Magnetic Hover */
.ustt-btn-11 {
    width: 75px;
    height: 75px;
    border-radius: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    cursor: pointer;
    position: relative;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.320, 1);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-11::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.3), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.ustt-btn-11::after {
    content: '↑';
    position: absolute;
    font-size: 30px;
    color: white;
    font-weight: bold;
    transition: all 0.3s;
}

.ustt-btn-11:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.4);
}

.ustt-btn-11:hover::before {
    opacity: 1;
}

.ustt-btn-11:hover::after {
    transform: translateY(-10px);
}

/* Button 12: Double Ring Orbit */
.ustt-btn-12 {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: radial-gradient(circle, #1a1a2e 60%, transparent);
    border: 3px solid #00d4ff;
    cursor: pointer;
    position: relative;
    transition: all 0.4s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-12::before,
.ustt-btn-12::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #00d4ff;
    box-shadow: 0 0 10px #00d4ff;
}

.ustt-btn-12::before {
    top: -5px;
    left: 50%;
    transform: translateX(-50%);
    animation: ustt-orbit1 2s linear infinite;
}

.ustt-btn-12::after {
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    animation: ustt-orbit2 2s linear infinite;
}

.ustt-btn-12-arrow {
    font-size: 28px;
    color: #00d4ff;
}

.ustt-btn-12:hover {
    border-color: #ff006e;
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
}

.ustt-btn-12:hover::before,
.ustt-btn-12:hover::after {
    background: #ff006e;
    box-shadow: 0 0 15px #ff006e;
}

@keyframes ustt-orbit1 {
    0% {
        transform: translateX(-50%) rotate(0deg) translateX(35px) rotate(0deg);
    }

    100% {
        transform: translateX(-50%) rotate(360deg) translateX(35px) rotate(-360deg);
    }
}

@keyframes ustt-orbit2 {
    0% {
        transform: translateX(-50%) rotate(180deg) translateX(35px) rotate(-180deg);
    }

    100% {
        transform: translateX(-50%) rotate(540deg) translateX(35px) rotate(-540deg);
    }
}

/* Button 13: Ink Splash */
.ustt-btn-13 {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid #000;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-13::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: #000;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.5s ease;
}

.ustt-btn-13::after {
    content: '↑';
    font-size: 30px;
    color: #000;
    font-weight: bold;
    z-index: 1;
    transition: color 0.3s 0.2s;
    position: relative;
}

.ustt-btn-13:hover::before {
    width: 200%;
    height: 200%;
}

.ustt-btn-13:hover::after {
    color: #fff;
}

/* Button 14: Holographic Shine */
.ustt-btn-14 {
    width: 75px;
    height: 75px;
    border-radius: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-14::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.7) 50%, transparent 70%);
    animation: ustt-holographic 3s linear infinite;
}

.ustt-btn-14::after {
    content: '⬆';
    font-size: 32px;
    color: white;
    z-index: 1;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.5));
}

.ustt-btn-14:hover {
    transform: scale(1.1);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.6);
}

@keyframes ustt-holographic {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }

    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Button 15: Minimalist Line */
.ustt-btn-15 {
    width: 60px;
    height: 60px;
    background: transparent;
    border: 2px solid #fff;
    border-radius: 50%;
    cursor: pointer;
    position: relative;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.ustt-btn-15::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2px;
    height: 20px;
    background: #fff;
    transform: translate(-50%, -50%);
    transition: all 0.3s;
}

.ustt-btn-15::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 10px;
    height: 10px;
    border-top: 2px solid #fff;
    border-right: 2px solid #fff;
    transform: translate(-50%, -30%) rotate(-45deg);
    transition: all 0.3s;
}

.ustt-btn-15:hover {
    transform: translateY(-8px);
    border-color: #667eea;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.ustt-btn-15:hover::before,
.ustt-btn-15:hover::after {
    filter: drop-shadow(0 0 5px #667eea);
}

/* Button 16: Cyberpunk Glitch */
.ustt-btn-16 {
    width: 70px;
    height: 70px;
    background: #000;
    border: 2px solid #0ff;
    cursor: pointer;
    position: relative;
    font-family: 'Orbitron', monospace;
    font-size: 30px;
    color: #0ff;
    text-shadow: 0 0 10px #0ff;
    clip-path: polygon(15% 0%, 85% 0%, 100% 15%, 100% 85%, 85% 100%, 15% 100%, 0% 85%, 0% 15%);
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-16::after {
    content: '↑';
}

.ustt-btn-16:hover {
    animation: ustt-glitch 0.3s infinite;
    background: #0ff;
    color: #000;
    text-shadow: none;
}

@keyframes ustt-glitch {

    0%,
    100% {
        transform: translate(0);
    }

    25% {
        transform: translate(-2px, 2px);
    }

    50% {
        transform: translate(2px, -2px);
    }

    75% {
        transform: translate(-2px, -2px);
    }
}

/* Button 17: Gradient Wave */
.ustt-btn-17 {
    width: 75px;
    height: 75px;
    border-radius: 50%;
    background: linear-gradient(135deg, #f6d365 0%, #fda085 100%);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.4s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-17::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.ustt-btn-17::after {
    content: '↑';
    position: absolute;
    font-size: 32px;
    color: white;
    font-weight: bold;
    z-index: 1;
}

.ustt-btn-17:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(253, 160, 133, 0.5);
}

.ustt-btn-17:hover::before {
    transform: translateX(100%);
}

/* Button 18: Split Reveal */
.ustt-btn-18 {
    width: 75px;
    height: 75px;
    background: #1a1a2e;
    border: 3px solid #667eea;
    border-radius: 15px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-18::before,
.ustt-btn-18::after {
    content: '';
    position: absolute;
    top: 0;
    width: 50%;
    height: 100%;
    background: #667eea;
    transition: transform 0.4s ease;
}

.ustt-btn-18::before {
    left: 0;
    transform: translateX(-100%);
}

.ustt-btn-18::after {
    right: 0;
    transform: translateX(100%);
}

.ustt-btn-18-arrow {
    position: relative;
    /* Fixed from absolute to be relative to flex container */
    font-size: 30px;
    color: #667eea;
    font-weight: bold;
    z-index: 1;
    transition: color 0.3s 0.2s;
}

.ustt-btn-18:hover::before {
    transform: translateX(0);
}

.ustt-btn-18:hover::after {
    transform: translateX(0);
}

.ustt-btn-18:hover .ustt-btn-18-arrow {
    color: #fff;
}

/* =========================================
   Black & White Collection (Buttons 19-38)
   ========================================= */

/* Button 19: Minimal Circle Outline */
.ustt-btn-19 {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    background: transparent;
    border: 2px solid #fff;
    cursor: pointer;
    position: relative;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.ustt-btn-19::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #fff;
    font-weight: bold;
    transition: all 0.3s;
}

.ustt-btn-19:hover {
    transform: translateY(-10px);
    background: #fff;
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.3);
}

.ustt-btn-19:hover::after {
    color: #000;
}

/* Button 20: Square Hard Shadow */
.ustt-btn-20 {
    width: 70px;
    height: 70px;
    background: #fff;
    border: 3px solid #000;
    cursor: pointer;
    font-size: 32px;
    color: #000;
    font-weight: bold;
    transition: all 0.1s;
    position: relative;
    box-shadow: 6px 6px 0 #fff, 12px 12px 0 #000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.ustt-btn-20::after {
    content: '↑';
}

.ustt-btn-20:hover {
    transform: translate(6px, 6px);
    box-shadow: 0 0 0 #fff, 6px 6px 0 #000;
}

.ustt-btn-20:active {
    transform: translate(12px, 12px);
    box-shadow: 0 0 0 #fff, 0 0 0 #000;
}

/* Button 21: Inverted Fill */
.ustt-btn-21 {
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: #000;
    border: 3px solid #fff;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
}

.ustt-btn-21::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0;
    background: #fff;
    transition: height 0.4s ease;
}

.ustt-btn-21::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 30px;
    color: #fff;
    font-weight: bold;
    z-index: 1;
    transition: color 0.3s 0.2s;
}

.ustt-btn-21:hover::before {
    height: 100%;
}

.ustt-btn-21:hover::after {
    color: #000;
}

/* Button 22: Striped Pattern */
.ustt-btn-22 {
    width: 70px;
    height: 70px;
    background: repeating-linear-gradient(45deg,
            #000,
            #000 5px,
            #fff 5px,
            #fff 10px);
    border: 3px solid #fff;
    cursor: pointer;
    position: relative;
    transition: all 0.3s;
    overflow: hidden;
}

.ustt-btn-22::before {
    content: '';
    position: absolute;
    inset: 0;
    background: #fff;
    transform: translateY(100%);
    transition: transform 0.4s ease;
}

.ustt-btn-22::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 30px;
    color: #fff;
    mix-blend-mode: difference;
    font-weight: bold;
    z-index: 1;
}

.ustt-btn-22:hover::before {
    transform: translateY(0);
}

/* Button 23: Dotted Border Spin */
.ustt-btn-23 {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    background: #fff;
    border: none;
    cursor: pointer;
    position: relative;
}

.ustt-btn-23::before {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    border: 3px dotted #fff;
    animation: ustt-rotate 8s linear infinite;
}

.ustt-btn-23::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #000;
    font-weight: bold;
}

.ustt-btn-23:hover::before {
    animation-duration: 2s;
    border-style: solid;
}

@keyframes ustt-rotate {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Button 24: Corner Brackets */
.ustt-btn-24 {
    width: 70px;
    height: 70px;
    background: #000;
    border: 2px solid #fff;
    cursor: pointer;
    position: relative;
    transition: all 0.3s;
}

.ustt-btn-24::before {
    content: '';
    position: absolute;
    inset: -6px;
    border: 2px solid #fff;
    clip-path: polygon(0 0, 20% 0, 20% 2px, 2px 2px, 2px 20%, 0 20%,
            0 80%, 2px 80%, 2px calc(100% - 2px), 20% calc(100% - 2px), 20% 100%, 0 100%,
            80% 100%, 80% calc(100% - 2px), calc(100% - 2px) calc(100% - 2px), calc(100% - 2px) 80%, 100% 80%, 100% 100%,
            100% 20%, calc(100% - 2px) 20%, calc(100% - 2px) 2px, 80% 2px, 80% 0, 100% 0);
    transition: all 0.3s;
}

.ustt-btn-24::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 30px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-24:hover {
    background: #fff;
}

.ustt-btn-24:hover::before {
    inset: -10px;
}

.ustt-btn-24:hover::after {
    color: #000;
}

/* Button 25: Concentric Circles */
.ustt-btn-25 {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: #fff;
    border: none;
    cursor: pointer;
    position: relative;
    box-shadow:
        0 0 0 4px #000,
        0 0 0 8px #fff,
        0 0 0 12px #000;
    transition: all 0.3s;
}

.ustt-btn-25::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #000;
    font-weight: bold;
}

.ustt-btn-25:hover {
    transform: scale(1.1);
    box-shadow:
        0 0 0 4px #fff,
        0 0 0 8px #000,
        0 0 0 12px #fff,
        0 0 20px rgba(255, 255, 255, 0.5);
}

/* Button 26: Diagonal Split */
.ustt-btn-26 {
    width: 70px;
    height: 70px;
    background: #fff;
    border: none;
    cursor: pointer;
    position: relative;
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    overflow: hidden;
    transition: all 0.3s;
}

.ustt-btn-26::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 200%;
    background: #000;
    transform: translateX(-100%) translateY(-100%) rotate(45deg);
    transition: transform 0.5s ease;
}

.ustt-btn-26::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 30px;
    color: #000;
    mix-blend-mode: difference;
    font-weight: bold;
    z-index: 1;
}

.ustt-btn-26:hover::before {
    transform: translateX(0) translateY(0) rotate(45deg);
}

/* Button 27: Checkered Pattern */
.ustt-btn-27 {
    width: 70px;
    height: 70px;
    background:
        linear-gradient(45deg, #000 25%, transparent 25%),
        linear-gradient(-45deg, #000 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #000 75%),
        linear-gradient(-45deg, transparent 75%, #000 75%);
    background-size: 10px 10px;
    background-position: 0 0, 0 5px, 5px -5px, -5px 0px;
    border: 3px solid #fff;
    cursor: pointer;
    position: relative;
    transition: all 0.3s;
}

.ustt-btn-27::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 30px;
    color: #fff;
    mix-blend-mode: difference;
    font-weight: bold;
}

.ustt-btn-27:hover {
    transform: rotate(45deg) scale(1.1);
}

/* Button 28: Double Border Expand */
.ustt-btn-28 {
    width: 65px;
    height: 65px;
    background: #000;
    border: 2px solid #fff;
    cursor: pointer;
    position: relative;
    transition: all 0.3s;
}

.ustt-btn-28::before {
    content: '';
    position: absolute;
    inset: -8px;
    border: 2px solid #fff;
    opacity: 0;
    transition: all 0.3s;
}

.ustt-btn-28::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #fff;
    font-weight: bold;
    transition: all 0.3s;
}

.ustt-btn-28:hover {
    background: #fff;
}

.ustt-btn-28:hover::before {
    opacity: 1;
    inset: -12px;
}

.ustt-btn-28:hover::after {
    color: #000;
}

/* Button 29: Half Circle Slide */
.ustt-btn-29 {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid #000;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
}

.ustt-btn-29::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: #000;
    transition: left 0.4s ease;
}

.ustt-btn-29::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 30px;
    color: #000;
    font-weight: bold;
    z-index: 1;
    transition: color 0.3s 0.2s;
}

.ustt-btn-29:hover::before {
    left: 0;
}

.ustt-btn-29:hover::after {
    color: #fff;
}

/* Button 30: Pixel Border */
.ustt-btn-30 {
    width: 68px;
    height: 68px;
    background: #000;
    border: none;
    cursor: pointer;
    position: relative;
    box-shadow:
        0 -4px 0 #fff, 4px -4px 0 #fff, 4px 0 0 #fff,
        4px 4px 0 #fff, 0 4px 0 #fff, -4px 4px 0 #fff,
        -4px 0 0 #fff, -4px -4px 0 #fff;
    transition: all 0.3s;
}

.ustt-btn-30::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-30:hover {
    background: #fff;
    box-shadow:
        0 -6px 0 #000, 6px -6px 0 #000, 6px 0 0 #000,
        6px 6px 0 #000, 0 6px 0 #000, -6px 6px 0 #000,
        -6px 0 0 #000, -6px -6px 0 #000;
    transform: scale(1.05);
}

.ustt-btn-30:hover::after {
    color: #000;
}

/* Button 31: Target Rings */
.ustt-btn-31 {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: #fff;
    border: none;
    cursor: pointer;
    position: relative;
    transition: all 0.3s;
}

.ustt-btn-31::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #000;
    transform: translate(-50%, -50%);
    transition: all 0.3s;
}

.ustt-btn-31::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    color: #fff;
    font-weight: bold;
    z-index: 1;
}

.ustt-btn-31:hover {
    transform: scale(1.15);
}

.ustt-btn-31:hover::before {
    width: 55px;
    height: 55px;
}

/* Button 32: Arrow Lines */
.ustt-btn-32 {
    width: 70px;
    height: 70px;
    background: #000;
    border: 2px solid #fff;
    cursor: pointer;
    position: relative;
    transition: all 0.3s;
}

.ustt-btn-32::before,
.ustt-btn-32::after {
    content: '';
    position: absolute;
    left: 50%;
    width: 3px;
    background: #fff;
    transition: all 0.3s;
}

.ustt-btn-32::before {
    top: 25%;
    height: 50%;
    transform: translateX(-50%);
}

.ustt-btn-32::after {
    top: 25%;
    height: 20px;
    transform: translateX(-50%) rotate(45deg);
    transform-origin: top;
}

.ustt-btn-32-arrow2 {
    position: absolute;
    top: 25%;
    left: 50%;
    width: 20px;
    height: 3px;
    background: #fff;
    transform: translateX(-50%) rotate(-45deg);
    transform-origin: top left;
    transition: all 0.3s;
}

.ustt-btn-32:hover {
    background: #fff;
}

.ustt-btn-32:hover::before,
.ustt-btn-32:hover::after {
    background: #000;
}

.ustt-btn-32:hover .ustt-btn-32-arrow2 {
    background: #000;
}

/* Button 33: Spinning Cross */
.ustt-btn-33 {
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid #000;
    cursor: pointer;
    position: relative;
    transition: all 0.3s;
}

.ustt-btn-33::before,
.ustt-btn-33::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    background: #000;
    transition: all 0.5s;
}

.ustt-btn-33::before {
    width: 60%;
    height: 2px;
    transform: translate(-50%, -50%);
}

.ustt-btn-33::after {
    width: 2px;
    height: 60%;
    transform: translate(-50%, -50%);
}

.ustt-btn-33-arrow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #000;
    font-weight: bold;
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 1;
}

.ustt-btn-33:hover::before {
    transform: translate(-50%, -50%) rotate(90deg);
}

.ustt-btn-33:hover::after {
    transform: translate(-50%, -50%) rotate(90deg);
}

.ustt-btn-33:hover .ustt-btn-33-arrow {
    opacity: 1;
}

/* Button 34: Hexagon Outline */
.ustt-btn-34 {
    width: 70px;
    height: 70px;
    background: #000;
    border: none;
    cursor: pointer;
    position: relative;
    clip-path: polygon(30% 0%, 70% 0%, 100% 50%, 70% 100%, 30% 100%, 0% 50%);
    transition: all 0.3s;
}

.ustt-btn-34::before {
    content: '';
    position: absolute;
    inset: 3px;
    background: #fff;
    clip-path: polygon(30% 0%, 70% 0%, 100% 50%, 70% 100%, 30% 100%, 0% 50%);
}

.ustt-btn-34::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #000;
    font-weight: bold;
    z-index: 1;
}

.ustt-btn-34:hover {
    transform: rotate(60deg) scale(1.1);
}

/* Button 35: Sliding Panels */
.ustt-btn-35 {
    width: 70px;
    height: 70px;
    background: #fff;
    border: 3px solid #000;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
}

.ustt-btn-35::before,
.ustt-btn-35::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 50%;
    background: #000;
    transition: transform 0.4s ease;
}

.ustt-btn-35::before {
    top: 0;
    transform: translateY(-100%);
}

.ustt-btn-35::after {
    bottom: 0;
    transform: translateY(100%);
}

.ustt-btn-35-arrow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 30px;
    color: #000;
    font-weight: bold;
    z-index: 1;
    transition: color 0.3s 0.2s;
}

.ustt-btn-35:hover::before {
    transform: translateY(0);
}

.ustt-btn-35:hover::after {
    transform: translateY(0);
}

.ustt-btn-35:hover .ustt-btn-35-arrow {
    color: #fff;
}

/* Button 36: Dashed Circle Rotate */
.ustt-btn-36 {
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: #000;
    border: 3px dashed #fff;
    cursor: pointer;
    position: relative;
    transition: all 0.3s;
}

.ustt-btn-36::before {
    content: '';
    position: absolute;
    inset: 6px;
    border-radius: 50%;
    border: 2px solid #fff;
    transition: all 0.3s;
}

.ustt-btn-36::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-36:hover {
    transform: rotate(180deg);
    border-style: solid;
}

.ustt-btn-36:hover::before {
    inset: 10px;
}

/* Button 37: Triangle */
.ustt-btn-37 {
    width: 0;
    height: 0;
    border-left: 40px solid transparent;
    border-right: 40px solid transparent;
    border-bottom: 70px solid #fff;
    cursor: pointer;
    position: relative;
    transition: all 0.3s;
    filter: drop-shadow(0 0 0 #000);
}

.ustt-btn-37::before {
    content: '↑';
    position: absolute;
    bottom: -50px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 26px;
    color: #000;
    font-weight: bold;
}

.ustt-btn-37:hover {
    border-bottom-color: #000;
    filter: drop-shadow(0 5px 10px rgba(255, 255, 255, 0.5));
}

.ustt-btn-37:hover::before {
    color: #fff;
}

/* Button 38: Diamond */
.ustt-btn-38 {
    width: 65px;
    height: 65px;
    background: #fff;
    border: 3px solid #000;
    cursor: pointer;
    position: relative;
    transform: rotate(45deg);
    transition: all 0.4s;
}

.ustt-btn-38::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-45deg);
    font-size: 28px;
    color: #000;
    font-weight: bold;
}

.ustt-btn-38:hover {
    background: #000;
    transform: rotate(225deg) scale(1.1);
}

.ustt-btn-38:hover::after {
    color: #fff;
    transform: translate(-50%, -50%) rotate(-225deg);
}

/* =========================================
   Scroll Progress Collection (Buttons 39-70)
   ========================================= */

/* --- Set 1: Black & White (39-50) --- */

/* Button 39: Circle with Outer Progress Ring */
.ustt-btn-39 {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #000;
    border: 2px solid #fff;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    pointer-events: auto;
    /* Ensure clickable */
}

.ustt-btn-39::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 26px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-39:hover {
    background: #fff;
    transform: scale(1.1);
}

.ustt-btn-39:hover::after {
    color: #000;
}

.ustt-btn-39-wrapper {
    position: relative;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-39-progress {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    pointer-events: none;
}

.ustt-btn-39-circle {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: rgba(255, 255, 255, 0.2);
}

.ustt-progress-indicator[data-type="stroke"] {
    fill: none;
    transition: stroke-dashoffset 0.1s linear;
    transform: rotate(-90deg);
    transform-origin: center;
}

/* Specific style for Btn 39 indicator */
.ustt-btn-39-wrapper .ustt-progress-indicator {
    stroke: #fff;
}

/* Button 40: Square with Top Progress Bar */
.ustt-btn-40-wrapper {
    position: relative;
    width: 100px;
    height: 70px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ustt-btn-40 {
    width: 100%;
    height: 60px;
    background: #fff;
    border: 3px solid #000;
    cursor: pointer;
    font-size: 28px;
    color: #000;
    font-weight: bold;
    transition: all 0.3s;
    box-shadow: 5px 5px 0 #000;
}

.ustt-btn-40::after {
    content: '↑';
}

.ustt-btn-40:hover {
    transform: translate(2px, 2px);
    box-shadow: 3px 3px 0 #000;
}

.ustt-btn-40-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.ustt-btn-40-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: #fff;
    transition: width 0.1s linear;
}

/* Button 41: Circle with Inner Fill */
.ustt-btn-41-wrapper {
    position: relative;
    width: 75px;
    height: 75px;
}

.ustt-btn-41 {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: #000;
    border: 3px solid #fff;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
}

.ustt-btn-41-fill {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: #fff;
    transition: height 0.1s linear;
}

.ustt-btn-41::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #fff;
    font-weight: bold;
    z-index: 1;
    transition: color 0.3s;
}

.ustt-btn-41.ustt-fill-active::after {
    color: #000;
}

.ustt-btn-41:hover {
    transform: scale(1.1);
}

/* Button 42: Square with Rotating Progress Border */
.ustt-btn-42-wrapper {
    position: relative;
    width: 85px;
    height: 85px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-42-progress {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.ustt-btn-42-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.2);
}

.ustt-btn-42-wrapper .ustt-progress-indicator {
    fill: none;
    stroke: #fff;
}

.ustt-btn-42 {
    width: 68px;
    height: 68px;
    background: #000;
    border: 3px solid #fff;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.ustt-btn-42::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-42:hover {
    transform: scale(1.1);
    background: #fff;
}

.ustt-btn-42:hover::after {
    color: #000;
}

/* Button 43: Side Progress Bar */
.ustt-btn-43-wrapper {
    display: flex;
    gap: 12px;
    align-items: center;
}

.ustt-btn-43-bar {
    width: 6px;
    height: 70px;
    background: rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.ustt-btn-43-fill {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: #fff;
    transition: height 0.1s linear;
}

.ustt-btn-43 {
    width: 70px;
    height: 70px;
    background: #fff;
    border: 3px solid #000;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.ustt-btn-43::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #000;
    font-weight: bold;
}

.ustt-btn-43:hover {
    background: #000;
}

.ustt-btn-43:hover::after {
    color: #fff;
}

/* Button 44: Double Ring Progress */
.ustt-btn-44-wrapper {
    position: relative;
    width: 85px;
    height: 85px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-44-outer,
.ustt-btn-44-inner {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.ustt-btn-44-inner {
    inset: 10px;
    width: calc(100% - 20px);
    height: calc(100% - 20px);
}

.ustt-btn-44-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.15);
}

.ustt-btn-44-wrapper .ustt-progress-indicator {
    stroke: #fff;
}

.ustt-btn-44 {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    background: #000;
    border: 2px solid #fff;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.ustt-btn-44::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-44:hover {
    transform: scale(1.15);
}

/* Button 45: Progress Line Indicators (4 lines) */
.ustt-btn-45-wrapper {
    position: relative;
    width: 90px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-45-lines {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.ustt-btn-45-line {
    position: absolute;
    width: 3px;
    height: 0;
    background: #fff;
    transition: height 0.1s linear;
}

.ustt-btn-45-line:nth-child(1) {
    top: 0;
    left: 0;
}

.ustt-btn-45-line:nth-child(2) {
    top: 0;
    right: 0;
}

.ustt-btn-45-line:nth-child(3) {
    bottom: 0;
    right: 0;
}

.ustt-btn-45-line:nth-child(4) {
    bottom: 0;
    left: 0;
}

.ustt-btn-45 {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: #000;
    border: 3px solid #fff;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.ustt-btn-45::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-45:hover {
    transform: scale(1.1);
}

/* Button 46: Four Dot Corner Indicators */
.ustt-btn-46-wrapper {
    position: relative;
    width: 90px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-46-corners {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.ustt-btn-46-corner {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.ustt-btn-46-corner.active {
    background: #fff;
    box-shadow: 0 0 10px #fff;
    transform: scale(1.3);
}

.ustt-btn-46-corner-tl {
    top: 0;
    left: 0;
}

.ustt-btn-46-corner-tr {
    top: 0;
    right: 0;
}

.ustt-btn-46-corner-bl {
    bottom: 0;
    left: 0;
}

.ustt-btn-46-corner-br {
    bottom: 0;
    right: 0;
}

.ustt-btn-46 {
    width: 70px;
    height: 70px;
    background: #000;
    border: 3px solid #fff;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.ustt-btn-46::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 30px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-46:hover {
    background: #fff;
    transform: scale(1.05);
}

.ustt-btn-46:hover::after {
    color: #000;
}

/* Button 47: Percentage Text Progress */
.ustt-btn-47-wrapper {
    position: relative;
    width: 100px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
}

.ustt-btn-47-text {
    font-family: monospace;
    font-size: 0.85rem;
    color: #fff;
    font-weight: bold;
    letter-spacing: 1px;
}

.ustt-btn-47 {
    width: 75px;
    height: 75px;
    border-radius: 50%;
    background: #000;
    border: 3px solid #fff;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.ustt-btn-47::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-47:hover {
    transform: scale(1.1);
}

/* Button 48: Circular Dots Progress */
.ustt-btn-48-wrapper {
    position: relative;
    width: 85px;
    height: 85px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-48-dots {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.ustt-btn-48-dot {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform-origin: center;
    transform: translate(-50%, -50%);
    /* Base */
    transition: all 0.3s;
}

/* JS will apply transform translate(x,y) to place them in circle */
.ustt-btn-48-dot.active {
    background: #fff;
    transform: scale(1.4);
    /* JS must overwrite this carefully */
}

.ustt-btn-48 {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #000;
    border: 2px solid #fff;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.ustt-btn-48::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 26px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-48:hover {
    transform: scale(1.1);
}

/* Button 49: Circular Arc Progress */
.ustt-btn-49-wrapper {
    position: relative;
    width: 85px;
    height: 85px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-49-progress {
    position: absolute;
    inset: 0;
    pointer-events: none;
    width: 100%;
    height: 100%;
}

.ustt-btn-49-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.2);
}

.ustt-btn-49-wrapper .ustt-progress-indicator {
    stroke: #fff;
    stroke-linecap: round;
}

.ustt-btn-49 {
    width: 65px;
    height: 65px;
    background: #fff;
    border: 3px solid #000;
    cursor: pointer;
    transition: all 0.3s;
    border-radius: 5px;
    position: relative;
}

.ustt-btn-49::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #000;
    font-weight: bold;
}

.ustt-btn-49:hover {
    background: #000;
    transform: scale(1.1);
}

.ustt-btn-49:hover::after {
    color: #fff;
}

/* Button 50: Top Progress Bar with Text */
.ustt-btn-50-wrapper {
    position: relative;
    width: 100px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ustt-btn-50-container {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ustt-btn-50-bar {
    flex: 1;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.ustt-btn-50-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: #fff;
    transition: width 0.1s linear;
}

.ustt-btn-50-text {
    font-family: monospace;
    font-size: 0.7rem;
    color: #fff;
    min-width: 35px;
    font-weight: bold;
}

.ustt-btn-50 {
    width: 100%;
    height: 70px;
    background: #000;
    border: 3px solid #fff;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.ustt-btn-50::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 30px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-50:hover {
    background: #fff;
}

.ustt-btn-50:hover::after {
    color: #000;
}

/* --- Set 2: Off-White Collection (51-70) --- */
/* Note: Since these use light backgrounds, we'll generally inverse colors or use user prefs if dynamic. 
   For now, strictly following user provided static styles but scoped. */

/* Button 51: Black Ring */
.ustt-btn-51-wrapper {
    position: relative;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-51-progress {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.ustt-btn-51-bg {
    fill: none;
    stroke: #e8e3da;
}

.ustt-btn-51-wrapper .ustt-progress-indicator {
    stroke: #000;
}

.ustt-btn-51 {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #000;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    position: relative;
}

.ustt-btn-51::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 26px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-51:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Button 52: Top Bar Black */
.ustt-btn-52-wrapper {
    position: relative;
    width: 100px;
    height: 75px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ustt-btn-52-bar {
    width: 100%;
    height: 5px;
    background: #e8e3da;
    position: relative;
    overflow: hidden;
    border-radius: 10px;
}

.ustt-btn-52-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: #000;
    transition: width 0.1s linear;
    border-radius: 10px;
}

.ustt-btn-52 {
    width: 100%;
    height: 60px;
    background: #1a1a1a;
    border: none;
    cursor: pointer;
    font-size: 28px;
    color: #fff;
    font-weight: bold;
    transition: all 0.3s;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    position: relative;
}

.ustt-btn-52::after {
    content: '↑';
}

.ustt-btn-52:hover {
    background: #000;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Button 53: Inner Fill Black */
.ustt-btn-53-wrapper {
    position: relative;
    width: 75px;
    height: 75px;
}

.ustt-btn-53 {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: #fff;
    border: 3px solid #1a1a1a;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.ustt-btn-53-fill {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: #000;
    transition: height 0.1s linear;
}

.ustt-btn-53::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #1a1a1a;
    font-weight: bold;
    z-index: 1;
    transition: color 0.3s;
}

.ustt-btn-53.ustt-fill-active::after {
    color: #fff;
}

.ustt-btn-53:hover {
    transform: scale(1.1);
}

/* Button 54: Square Border Black */
.ustt-btn-54-wrapper {
    position: relative;
    width: 85px;
    height: 85px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-54-progress {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.ustt-btn-54-bg {
    fill: none;
    stroke: #e8e3da;
}

.ustt-btn-54-wrapper .ustt-progress-indicator {
    stroke: #000;
}

.ustt-btn-54 {
    width: 68px;
    height: 68px;
    background: #000;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    position: relative;
}

.ustt-btn-54::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-54:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Button 55: Side Bar Black */
.ustt-btn-55-wrapper {
    display: flex;
    gap: 12px;
    align-items: center;
}

.ustt-btn-55-bar {
    width: 6px;
    height: 75px;
    background: #e8e3da;
    position: relative;
    overflow: hidden;
    border-radius: 10px;
}

.ustt-btn-55-fill {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: #000;
    transition: height 0.1s linear;
    border-radius: 10px;
}

.ustt-btn-55 {
    width: 70px;
    height: 70px;
    background: #1a1a1a;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.ustt-btn-55::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-55:hover {
    background: #000;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Button 56: Double Ring Black */
.ustt-btn-56-wrapper {
    position: relative;
    width: 88px;
    height: 88px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-56-outer,
.ustt-btn-56-inner {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.ustt-btn-56-inner {
    inset: 10px;
    width: calc(100% - 20px);
    height: calc(100% - 20px);
}

.ustt-btn-56-bg {
    fill: none;
    stroke: #e8e3da;
}

.ustt-btn-56-wrapper .ustt-progress-indicator {
    stroke: #1a1a1a;
}

.ustt-btn-56-wrapper .ustt-progress-indicator-inner {
    stroke: #000;
}

.ustt-btn-56 {
    width: 58px;
    height: 58px;
    border-radius: 50%;
    background: #000;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    position: relative;
}

.ustt-btn-56::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-56:hover {
    transform: scale(1.12);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Button 57: Corner Lines Black */
.ustt-btn-57-wrapper {
    position: relative;
    width: 90px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-57-lines {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.ustt-btn-57-line {
    position: absolute;
    width: 4px;
    height: 0;
    background: #000;
    transition: height 0.1s linear;
    border-radius: 2px;
}

.ustt-btn-57-line:nth-child(1) {
    top: 0;
    left: 0;
}

.ustt-btn-57-line:nth-child(2) {
    top: 0;
    right: 0;
}

.ustt-btn-57-line:nth-child(3) {
    bottom: 0;
    right: 0;
}

.ustt-btn-57-line:nth-child(4) {
    bottom: 0;
    left: 0;
}

.ustt-btn-57 {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: #000;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    position: relative;
}

.ustt-btn-57::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-57:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Button 58: Corner Dots Black */
.ustt-btn-58-wrapper {
    position: relative;
    width: 90px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-58-corners {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.ustt-btn-58-corner {
    position: absolute;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: #d8d3ca;
    transition: all 0.3s ease;
}

.ustt-btn-58-corner.active {
    background: #000;
    box-shadow: 0 0 12px rgba(0, 0, 0, 0.4);
    transform: scale(1.4);
}

.ustt-btn-58-corner-tl {
    top: 0;
    left: 0;
}

.ustt-btn-58-corner-tr {
    top: 0;
    right: 0;
}

.ustt-btn-58-corner-bl {
    bottom: 0;
    left: 0;
}

.ustt-btn-58-corner-br {
    bottom: 0;
    right: 0;
}

.ustt-btn-58 {
    width: 68px;
    height: 68px;
    background: #1a1a1a;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    position: relative;
}

.ustt-btn-58::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-58:hover {
    background: #000;
    transform: scale(1.08);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Button 59: Percentage Display Black */
.ustt-btn-59-wrapper {
    position: relative;
    width: 100px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}

.ustt-btn-59-text {
    font-family: sans-serif;
    font-size: 0.9rem;
    color: #000;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.ustt-btn-59 {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: #000;
    border: 3px solid #e8e3da;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.ustt-btn-59::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 26px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-59:hover {
    transform: scale(1.1);
    border-color: #000;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Button 60: Circular Dots Black */
.ustt-btn-60-wrapper {
    position: relative;
    width: 85px;
    height: 85px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-60-dots {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.ustt-btn-60-dot {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #d8d3ca;
    transform-origin: center;
    transform: translate(-50%, -50%);
    /* Base */
    transition: all 0.3s;
}

.ustt-btn-60-dot.active {
    background: #000;
    transform: scale(1.6);
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.3);
}

.ustt-btn-60 {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #000;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    position: relative;
}

.ustt-btn-60::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-60:hover {
    transform: scale(1.12);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Button 61: Rounded Arc Black */
.ustt-btn-61-wrapper {
    position: relative;
    width: 85px;
    height: 85px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-61-progress {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.ustt-btn-61-bg {
    fill: none;
    stroke: #e8e3da;
}

.ustt-btn-61-wrapper .ustt-progress-indicator {
    stroke: #000;
    stroke-linecap: round;
}

.ustt-btn-61 {
    width: 66px;
    height: 66px;
    background: #1a1a1a;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    position: relative;
}

.ustt-btn-61::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 26px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-61:hover {
    transform: scale(1.1);
    background: #000;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Button 62: Bar + Percentage Black */
.ustt-btn-62-wrapper {
    position: relative;
    width: 100px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ustt-btn-62-container {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ustt-btn-62-bar {
    flex: 1;
    height: 5px;
    background: #e8e3da;
    position: relative;
    overflow: hidden;
    border-radius: 10px;
}

.ustt-btn-62-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: #000;
    transition: width 0.1s linear;
    border-radius: 10px;
}

.ustt-btn-62-text {
    font-family: sans-serif;
    font-size: 0.75rem;
    color: #000;
    min-width: 35px;
    font-weight: 700;
}

.ustt-btn-62 {
    width: 100%;
    height: 68px;
    background: #1a1a1a;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.ustt-btn-62::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-62:hover {
    background: #000;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Button 63: Hexagon */
.ustt-btn-63-wrapper {
    position: relative;
    width: 85px;
    height: 85px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-63-progress {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.ustt-btn-63-bg {
    fill: none;
    stroke: #e8e3da;
}

.ustt-btn-63-wrapper .ustt-progress-indicator {
    stroke: #000;
}

.ustt-btn-63 {
    width: 62px;
    height: 62px;
    background: #000;
    border: none;
    cursor: pointer;
    clip-path: polygon(30% 0%, 70% 0%, 100% 50%, 70% 100%, 30% 100%, 0% 50%);
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    position: relative;
}

.ustt-btn-63::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-63:hover {
    transform: scale(1.15);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Button 64: Diagonal Bar */
.ustt-btn-64-wrapper {
    position: relative;
    width: 95px;
    height: 75px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ustt-btn-64-bar {
    width: 100%;
    height: 5px;
    background: #e8e3da;
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    transform: skewX(-20deg);
}

.ustt-btn-64-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: #000;
    transition: width 0.1s linear;
    border-radius: 10px;
}

.ustt-btn-64 {
    width: 100%;
    height: 60px;
    background: #000;
    border: none;
    cursor: pointer;
    font-size: 26px;
    color: #fff;
    font-weight: bold;
    transition: all 0.3s;
    border-radius: 6px;
    transform: skewX(-5deg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    position: relative;
}

.ustt-btn-64::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.ustt-btn-64:hover {
    transform: skewX(-5deg) translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Button 65: Triangle */
.ustt-btn-65-wrapper {
    position: relative;
    width: 85px;
    height: 85px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-65-progress {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.ustt-btn-65-bg {
    fill: none;
    stroke: #e8e3da;
}

.ustt-btn-65-wrapper .ustt-progress-indicator {
    stroke: #000;
}

.ustt-btn-65 {
    width: 0;
    height: 0;
    border-left: 32px solid transparent;
    border-right: 32px solid transparent;
    border-bottom: 56px solid #000;
    cursor: pointer;
    transition: all 0.3s;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.2));
    position: relative;
    background: transparent;
    /* Override default */
}

.ustt-btn-65::after {
    content: '↑';
    position: absolute;
    bottom: -48px;
    left: 0;
    /* Centered via borders */
    transform: translateX(-50%);
    font-size: 22px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-65:hover {
    filter: drop-shadow(0 6px 20px rgba(0, 0, 0, 0.3));
}

/* Button 66: Pentagon */
.ustt-btn-66-wrapper {
    position: relative;
    width: 85px;
    height: 85px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-66-progress {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.ustt-btn-66-bg {
    fill: none;
    stroke: #e8e3da;
}

.ustt-btn-66-wrapper .ustt-progress-indicator {
    stroke: #000;
}

.ustt-btn-66 {
    width: 64px;
    height: 64px;
    background: #1a1a1a;
    border: none;
    cursor: pointer;
    clip-path: polygon(50% 0%, 100% 38%, 82% 100%, 18% 100%, 0% 38%);
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    position: relative;
}

.ustt-btn-66::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 26px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-66:hover {
    transform: scale(1.12);
    background: #000;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Button 67: Octagon */
.ustt-btn-67-wrapper {
    position: relative;
    width: 85px;
    height: 85px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-67-progress {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.ustt-btn-67-bg {
    fill: none;
    stroke: #e8e3da;
}

.ustt-btn-67-wrapper .ustt-progress-indicator {
    stroke: #000;
}

.ustt-btn-67 {
    width: 65px;
    height: 65px;
    background: #000;
    border: none;
    cursor: pointer;
    clip-path: polygon(30% 0%, 70% 0%, 100% 30%, 100% 70%, 70% 100%, 30% 100%, 0% 70%, 0% 30%);
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    position: relative;
}

.ustt-btn-67::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 26px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-67:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Button 68: Diamond */
.ustt-btn-68-wrapper {
    position: relative;
    width: 85px;
    height: 85px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-68-progress {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.ustt-btn-68-bg {
    fill: none;
    stroke: #e8e3da;
}

.ustt-btn-68-wrapper .ustt-progress-indicator {
    stroke: #000;
}

/* Note: SVG rect is rotated 45deg in HTML, so logic matches */
.ustt-btn-68 {
    width: 56px;
    height: 56px;
    background: #1a1a1a;
    border: 2px solid #000;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transform: rotate(45deg);
    /* Base rotation */
    position: relative;
}

.ustt-btn-68::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-45deg);
    /* Counter rotate */
    font-size: 24px;
    color: #fff;
    font-weight: bold;
}

/* Hover: from 45deg -> 225deg (180 rotation) + scale */
.ustt-btn-68:hover {
    transform: rotate(225deg) scale(1.1);
    background: #000;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Button 69: Pill Shape */
.ustt-btn-69-wrapper {
    position: relative;
    width: 100px;
    height: 75px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ustt-btn-69-bar {
    width: 100%;
    height: 6px;
    background: #e8e3da;
    position: relative;
    overflow: hidden;
    border-radius: 20px;
}

.ustt-btn-69-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: #000;
    transition: width 0.1s linear;
    border-radius: 20px;
}

.ustt-btn-69 {
    width: 100%;
    height: 60px;
    background: #1a1a1a;
    border: none;
    cursor: pointer;
    font-size: 28px;
    color: #fff;
    font-weight: bold;
    transition: all 0.3s;
    border-radius: 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    position: relative;
}

.ustt-btn-69::after {
    content: '↑';
}

.ustt-btn-69:hover {
    background: #000;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Button 70: Thick Border */
.ustt-btn-70-wrapper {
    position: relative;
    width: 88px;
    height: 88px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ustt-btn-70-progress {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.ustt-btn-70-bg {
    fill: none;
    stroke: #e8e3da;
}

.ustt-btn-70-wrapper .ustt-progress-indicator {
    stroke: #000;
}

.ustt-btn-70 {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: #1a1a1a;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    position: relative;
}

.ustt-btn-70::after {
    content: '↑';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 26px;
    color: #fff;
    font-weight: bold;
}

.ustt-btn-70:hover {
    transform: scale(1.1);
    background: #000;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* -------------------------------------------------------------------------- */
/* Custom Icon Templates (71-85)
/* -------------------------------------------------------------------------- */
.ustt-custom-icon {
    width: 60px;
    height: 60px;
    background-color: #ffffff;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #334155;
    padding: 0;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.ustt-custom-icon:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    border-color: #cbd5e1;
    color: #0f172a;
}

.ustt-custom-icon svg {
    width: 28px;
    height: 28px;
    stroke-width: 2px;
}