/* ============================================
   ScanSeq — Modern UI Stylesheet
   by @stablephisher
   ============================================ */

:root {
    --bg-primary: #080810;
    --bg-secondary: #0e0e1a;
    --bg-card: rgba(14, 14, 28, 0.92);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --bg-glass-hover: rgba(255, 255, 255, 0.09);
    --border-glass: rgba(255, 255, 255, 0.09);
    --border-glow: rgba(99, 102, 241, 0.3);
    --text-primary: #eeeef5;
    --text-secondary: #8080a0;
    --text-muted: #44445a;
    --accent-1: #6366f1;
    --accent-2: #22d3ee;
    --accent-3: #a78bfa;
    --gradient-main: linear-gradient(135deg, #6366f1 0%, #22d3ee 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(34,211,238,0.12));
    --gradient-warm: linear-gradient(135deg, #6366f1, #a78bfa);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.12), 0 0 80px rgba(34, 211, 238, 0.06);
    --shadow-panel: 0 -1px 0 rgba(255,255,255,0.05), 0 -8px 32px rgba(0,0,0,0.4);
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 13px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Hide p5 default video element; canvas is shown via #canvas-container rule */
video {
    display: none !important;
}

.hidden {
    display: none !important;
}

/* ============================================
   LOADING SCREEN
   ============================================ */

#loading-screen {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

#loading-screen.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    text-align: center;
}

.loader-icon {
    margin-bottom: 24px;
}

.spin-ring {
    animation: spin 4s linear infinite;
    transform-origin: 32px 32px;
}

.spin-ring-reverse {
    animation: spin 3s linear infinite reverse;
    transform-origin: 32px 32px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loader-title {
    font-size: 28px;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.loader-subtitle {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 24px;
}

.loader-bar {
    width: 200px;
    height: 3px;
    background: var(--bg-glass);
    border-radius: 3px;
    overflow: hidden;
    margin: 0 auto;
}

.loader-bar-fill {
    width: 0%;
    height: 100%;
    background: var(--gradient-main);
    border-radius: 3px;
    animation: loadProgress 2s ease forwards;
}

@keyframes loadProgress {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

/* ============================================
   START OVERLAY
   ============================================ */

#start-overlay {
    position: fixed;
    inset: 0;
    z-index: 9000;
    background: radial-gradient(ellipse at center, rgba(99,102,241,0.08) 0%, var(--bg-primary) 70%);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

#start-overlay.fade-out {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.start-content {
    text-align: center;
    max-width: 480px;
    padding: 0 24px;
}

.start-icon-ring {
    margin-bottom: 32px;
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { filter: drop-shadow(0 0 15px rgba(99,102,241,0.35)); transform: scale(1); }
    50% { filter: drop-shadow(0 0 32px rgba(34,211,238,0.4)); transform: scale(1.05); }
}

.start-title {
    font-size: 48px;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
    letter-spacing: -1px;
}

.start-desc {
    font-size: 11px;
    color: var(--accent-2);
    margin-bottom: 12px;
    font-weight: 600;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 3px;
    opacity: 0.9;
}

.start-instruction {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 36px;
    line-height: 1.6;
}

.btn-gradient {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 40px;
    background: var(--gradient-main);
    color: white;
    border: none;
    border-radius: 50px;
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 4px 32px rgba(99, 102, 241, 0.35), 0 2px 8px rgba(34,211,238,0.15);
    letter-spacing: 0.2px;
}

.btn-gradient:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 8px 48px rgba(99, 102, 241, 0.5), 0 4px 20px rgba(34,211,238,0.25);
}

.btn-gradient:active {
    transform: translateY(0) scale(0.98);
}

.start-note {
    margin-top: 20px;
    font-size: 11px;
    color: var(--text-muted);
}

/* ============================================
   TOP BAR
   ============================================ */

#top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    background: rgba(8, 8, 16, 0.9);
    backdrop-filter: blur(24px) saturate(1.5);
    -webkit-backdrop-filter: blur(24px) saturate(1.5);
    border-bottom: 1px solid var(--border-glass);
    box-shadow: 0 1px 0 rgba(255,255,255,0.04), 0 4px 24px rgba(0,0,0,0.4);
}

.top-bar-left, .top-bar-center, .top-bar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--gradient-main);
    box-shadow: 0 0 10px rgba(34,211,238,0.6), 0 0 4px rgba(99,102,241,0.4);
}

.brand-name {
    font-size: 15px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.brand-badge {
    font-size: 9px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    letter-spacing: 1px;
    animation: badge-pulse 2s ease-in-out infinite;
}

@keyframes badge-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.now-playing {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 14px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(34,211,238,0.15);
    border-radius: 20px;
    box-shadow: 0 0 20px rgba(34,211,238,0.06);
}

.np-bars {
    display: flex;
    align-items: flex-end;
    gap: 2px;
    height: 14px;
}

.np-bars span {
    display: block;
    width: 3px;
    background: var(--accent-2);
    border-radius: 2px;
    animation: bar-dance 0.8s ease-in-out infinite alternate;
}

.np-bars span:nth-child(1) { height: 4px; animation-delay: 0s; }
.np-bars span:nth-child(2) { height: 8px; animation-delay: 0.15s; }
.np-bars span:nth-child(3) { height: 12px; animation-delay: 0.3s; }
.np-bars span:nth-child(4) { height: 6px; animation-delay: 0.45s; }
.np-bars span:nth-child(5) { height: 10px; animation-delay: 0.6s; }

@keyframes bar-dance {
    0% { height: 3px; }
    100% { height: 14px; }
}

.np-bars.paused span {
    animation-play-state: paused;
    height: 3px !important;
}

.np-text {
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 500;
}

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--bg-glass);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.icon-btn:hover {
    background: rgba(255,255,255,0.08);
    color: var(--text-primary);
}

.icon-btn svg, .icon-btn i {
    width: 16px;
    height: 16px;
}

/* ============================================
   CANVAS CONTAINER
   ============================================ */

#canvas-container {
    position: fixed;
    top: 48px;
    left: 0;
    right: 0;
    bottom: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--bg-primary);
}

#canvas-container canvas {
    display: block !important;
    border-radius: 0;
}

/* ============================================
   CONTROL PANEL
   ============================================ */

#control-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: 64px;
    background: rgba(8, 8, 16, 0.92);
    backdrop-filter: blur(28px) saturate(1.8);
    -webkit-backdrop-filter: blur(28px) saturate(1.8);
    border-top: 1px solid rgba(255, 255, 255, 0.07);
    box-shadow: var(--shadow-panel);
    display: flex;
    align-items: center;
    padding: 0 16px;
}

.controls-row {
    display: flex;
    align-items: center;
    gap: 16px;
    width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
}

.controls-row::-webkit-scrollbar {
    display: none;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.transport-group {
    gap: 4px;
    padding-right: 12px;
    margin-right: 4px;
    border-right: 1px solid var(--border-glass);
}

.ctrl-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.ctrl-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.ctrl-btn:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
    border-color: rgba(255,255,255,0.15);
    box-shadow: 0 2px 12px rgba(99,102,241,0.15);
}

.ctrl-btn svg, .ctrl-btn i {
    width: 18px;
    height: 18px;
}

.ctrl-btn-primary {
    background: var(--gradient-main);
    border: none;
    color: white;
    box-shadow: 0 2px 12px rgba(99,102,241,0.3);
}

.ctrl-btn-primary:hover {
    color: white;
    box-shadow: 0 4px 20px rgba(99,102,241,0.5);
    transform: scale(1.05);
}

.ctrl-btn-active {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

.ctrl-select {
    height: 32px;
    padding: 0 28px 0 10px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%238080a0' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
}

.ctrl-select:hover {
    border-color: rgba(99,102,241,0.3);
    background-color: rgba(99,102,241,0.06);
}

.ctrl-select:focus {
    outline: none;
    border-color: var(--accent-1);
    box-shadow: 0 0 0 2px rgba(99,102,241,0.18);
}

.ctrl-select option {
    background: #1a1a2e;
    color: var(--text-primary);
}

.ctrl-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 80px;
    height: 4px;
    background: rgba(255,255,255,0.08);
    border-radius: 4px;
    outline: none;
    cursor: pointer;
}

.ctrl-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--gradient-main);
    border: 2px solid var(--bg-primary);
    box-shadow: 0 0 8px rgba(34,211,238,0.4);
    cursor: pointer;
    transition: transform var(--transition);
}

.ctrl-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.ctrl-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--gradient-main);
    border: 2px solid var(--bg-primary);
    box-shadow: 0 0 8px rgba(34,211,238,0.4);
    cursor: pointer;
}

.ctrl-value {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-secondary);
    min-width: 20px;
    text-align: center;
}

/* ============================================
   HELP OVERLAY
   ============================================ */

.overlay {
    position: fixed;
    inset: 0;
    z-index: 500;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

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

.overlay-card {
    background: rgba(10, 10, 22, 0.95);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    max-width: 460px;
    width: 90%;
    box-shadow: 0 0 0 1px rgba(99,102,241,0.08), 0 8px 64px rgba(0,0,0,0.6), var(--shadow-glow);
    backdrop-filter: blur(32px);
    -webkit-backdrop-filter: blur(32px);
}

.overlay-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.overlay-header h3 {
    font-size: 18px;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shortcut-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 0;
}

.shortcut-item kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 26px;
    padding: 0 8px;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border-glass);
    border-radius: 5px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--text-primary);
}

.shortcut-item span {
    font-size: 12px;
    color: var(--text-secondary);
}

.overlay-footer {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border-glass);
    text-align: center;
    font-size: 11px;
    color: var(--text-muted);
}

.overlay-footer a {
    color: var(--accent-1);
    text-decoration: none;
}

.overlay-footer a:hover {
    text-decoration: underline;
}

/* ============================================
   NOTE DISPLAY
   ============================================ */

#note-display {
    position: fixed;
    top: 56px;
    right: 12px;
    z-index: 50;
}

#note-history {
    display: flex;
    flex-direction: column;
    gap: 3px;
    align-items: flex-end;
}

.note-pill {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    color: white;
    background: var(--gradient-main);
    opacity: 1;
    transform: translateX(0);
    animation: noteSlide 1.5s ease forwards;
    box-shadow: 0 2px 12px rgba(34,211,238,0.25), 0 0 24px rgba(99,102,241,0.15);
}

@keyframes noteSlide {
    0% { opacity: 0; transform: translateX(20px); }
    15% { opacity: 1; transform: translateX(0); }
    70% { opacity: 1; }
    100% { opacity: 0; transform: translateX(-10px); }
}

/* ============================================
   FPS COUNTER
   ============================================ */

#fps-counter {
    position: fixed;
    top: 56px;
    left: 12px;
    z-index: 50;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-muted);
    padding: 2px 8px;
    background: rgba(0,0,0,0.5);
    border-radius: 4px;
}

/* ============================================
   SCREENSHOT FLASH
   ============================================ */

.screenshot-flash {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: white;
    animation: flash 0.3s ease forwards;
    pointer-events: none;
}

@keyframes flash {
    0% { opacity: 0.8; }
    100% { opacity: 0; }
}

/* ============================================
   SCROLLBAR
   ============================================ */

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 900px) {
    .controls-row {
        gap: 10px;
    }
    .ctrl-slider {
        width: 60px;
    }
    .shortcut-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .start-title {
        font-size: 36px;
    }
    #control-panel {
        height: 56px;
    }
    .ctrl-select {
        max-width: 90px;
    }
    .ctrl-slider {
        width: 50px;
    }
}