/* Reset and Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    overflow: hidden;
    background: #000;
    color: #fff;
    touch-action: none;
    -webkit-user-select: none;
    user-select: none;
}

/* Canvas */
#canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    cursor: crosshair;
    background: radial-gradient(ellipse at bottom, #1a0a2e 0%, #000 70%);
}

/* UI Toggle Button - Always Visible */
.ui-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 2000;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.ui-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.1);
}

.ui-toggle.ui-hidden {
    opacity: 0.5;
}

/* Main UI Container */
#main-ui {
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

#main-ui.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* Countdown Section */
#countdown-overlay {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -60%);
    z-index: 100;
    text-align: center;
    pointer-events: none;
}

.countdown-container {
    padding: 2rem 3rem;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    border: 1px solid rgba(255, 215, 0, 0.3);
}

.timezone-info {
    font-size: 0.9rem;
    color: #ffd700;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.countdown-display {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.time-unit {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 70px;
}

.time-value {
    font-size: 3.5rem;
    font-weight: 200;
    color: #fff;
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.time-label {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: 0.5rem;
}

.time-separator {
    font-size: 2.5rem;
    font-weight: 200;
    color: rgba(255, 215, 0, 0.6);
    padding-bottom: 1.5rem;
}

.countdown-message {
    margin-top: 1.5rem;
    font-size: 1.1rem;
    color: #ffd700;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 3px;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
}

.countdown-message #target-year {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    margin-left: 0.3rem;
    text-shadow:
        0 0 10px rgba(255, 215, 0, 1),
        0 0 30px rgba(255, 215, 0, 0.6);
}

/* Action Buttons */
#action-buttons {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 1rem;
    z-index: 100;
}

.action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    padding: 1rem 1.5rem;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 90px;
}

.action-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

.action-btn:active {
    transform: translateY(0);
}

.action-btn.active {
    background: rgba(255, 215, 0, 0.2);
    border-color: rgba(255, 215, 0, 0.6);
}

.btn-icon {
    font-size: 1.8rem;
}

.btn-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
}

/* Settings */
#settings {
    position: fixed;
    bottom: 2rem;
    right: 1rem;
    z-index: 100;
}

.setting-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    cursor: pointer;
    font-size: 1.3rem;
    transition: all 0.2s ease;
}

.setting-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.setting-btn.sound-off {
    opacity: 0.5;
}

/* Credits */
#credits {
    position: fixed;
    bottom: 0.5rem;
    left: 0;
    right: 0;
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.4);
    text-align: center;
    z-index: 50;
    padding: 0 1rem;
}

#credits a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: color 0.2s ease;
}

#credits a:hover {
    color: rgba(255, 215, 0, 0.8);
}

/* Celebration Overlay */
.hidden {
    display: none !important;
}

#celebration-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 3000;
    pointer-events: none;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.celebration-content {
    text-align: center;
    animation: scaleIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes scaleIn {
    from { transform: scale(0.5); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.celebration-title {
    font-size: 3rem;
    font-weight: 300;
    color: #ffd700;
    text-transform: uppercase;
    letter-spacing: 8px;
    text-shadow:
        0 0 30px rgba(255, 215, 0, 1),
        0 0 60px rgba(255, 215, 0, 0.5);
    margin-bottom: 0.5rem;
}

.celebration-year {
    font-size: 8rem;
    font-weight: 100;
    color: #fff;
    text-shadow:
        0 0 40px rgba(255, 215, 0, 1),
        0 0 80px rgba(255, 215, 0, 0.6),
        0 0 120px rgba(255, 100, 0, 0.4);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

/* Mobile Styles */
@media (max-width: 600px) {
    .ui-toggle {
        width: 44px;
        height: 44px;
        font-size: 1.3rem;
    }

    .countdown-container {
        padding: 1.5rem 2rem;
        margin: 0 1rem;
    }

    .time-value {
        font-size: 2.5rem;
    }

    .time-unit {
        min-width: 55px;
    }

    .time-separator {
        font-size: 2rem;
        padding-bottom: 1rem;
    }

    .countdown-message {
        font-size: 0.9rem;
        letter-spacing: 2px;
    }

    .countdown-message #target-year {
        font-size: 1.1rem;
    }

    #action-buttons {
        bottom: 2.5rem;
        gap: 0.75rem;
    }

    #credits {
        font-size: 0.55rem;
        bottom: 0.4rem;
    }

    .action-btn {
        padding: 0.8rem 1rem;
        min-width: 75px;
        border-radius: 12px;
    }

    .btn-icon {
        font-size: 1.5rem;
    }

    .btn-label {
        font-size: 0.6rem;
    }

    #settings {
        bottom: 1.5rem;
        right: 0.75rem;
    }

    .setting-btn {
        width: 44px;
        height: 44px;
        font-size: 1.1rem;
    }

    .celebration-title {
        font-size: 1.8rem;
        letter-spacing: 4px;
    }

    .celebration-year {
        font-size: 5rem;
    }
}

/* Landscape Mobile */
@media (max-height: 500px) {
    #countdown-overlay {
        transform: translate(-50%, -55%);
    }

    .countdown-container {
        padding: 1rem 2rem;
    }

    .time-value {
        font-size: 2rem;
    }

    .countdown-message {
        margin-top: 0.75rem;
    }

    #action-buttons {
        bottom: 1rem;
    }
}