/* ==========================================
   CHROME CUBE - STYLE SHEET
   ========================================== */

/* Design Variables & Themes */
:root {
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.3);
    --shadow-inset: inset 0 2px 4px rgba(255, 255, 255, 0.05);
    
    /* Font Families */
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Share Tech Mono', monospace;
}

/* 1. Neon Cyberpunk Theme */
body.theme-neon {
    --bg-primary: #0a0a16;
    --bg-secondary: #111126;
    --card-bg: rgba(17, 17, 38, 0.65);
    --card-border: rgba(99, 102, 241, 0.15);
    --card-border-hover: rgba(99, 102, 241, 0.4);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent: #6366f1; /* Indigo */
    --accent-glow: rgba(99, 102, 241, 0.4);
    --accent-secondary: #ec4899; /* Pink */
    --accent-secondary-glow: rgba(236, 72, 153, 0.3);
    
    /* Cube face colors */
    --clr-u: #ffffff;
    --clr-d: #ffee00;
    --clr-f: #00ff66;
    --clr-b: #0088ff;
    --clr-r: #ff0055;
    --clr-l: #ff7700;
}

/* 2. Classic Rubik's Theme */
body.theme-classic {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --card-bg: rgba(30, 30, 30, 0.8);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-border-hover: rgba(255, 255, 255, 0.2);
    
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-muted: #737373;
    
    --accent: #2563eb; /* Royal Blue */
    --accent-glow: rgba(37, 99, 235, 0.3);
    --accent-secondary: #16a34a; /* Classic Green */
    --accent-secondary-glow: rgba(22, 163, 74, 0.2);
    
    --clr-u: #ffffff;
    --clr-d: #ffd700;
    --clr-f: #009b48;
    --clr-b: #0046ad;
    --clr-r: #b71234;
    --clr-l: #ff5800;
}

/* 3. Dreamy Pastel Theme */
body.theme-pastel {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(244, 63, 94, 0.15);
    --card-border-hover: rgba(139, 92, 246, 0.4);
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    
    --accent: #c084fc; /* Lavender/Purple */
    --accent-glow: rgba(192, 132, 252, 0.4);
    --accent-secondary: #f472b6; /* Pastel pink */
    --accent-secondary-glow: rgba(244, 114, 182, 0.3);
    
    --clr-u: #f8fafc;
    --clr-d: #fef08a;
    --clr-f: #86efac;
    --clr-b: #93c5fd;
    --clr-r: #fca5a5;
    --clr-l: #fed7aa;
}

/* 4. Carbon & Chrome Theme */
body.theme-carbon {
    --bg-primary: #09090b;
    --bg-secondary: #18181b;
    --card-bg: rgba(24, 24, 27, 0.8);
    --card-border: rgba(255, 255, 255, 0.05);
    --card-border-hover: rgba(255, 255, 255, 0.25);
    
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #52525b;
    
    --accent: #e4e4e7; /* Silver Zinc */
    --accent-glow: rgba(228, 228, 231, 0.2);
    --accent-secondary: #3f3f46;
    --accent-secondary-glow: rgba(63, 63, 70, 0.25);
    
    --clr-u: #f4f4f5;
    --clr-d: #a1a1aa;
    --clr-f: #71717a;
    --clr-b: #3f3f46;
    --clr-r: #27272a;
    --clr-l: #18181b;
}

/* Base Resets & Layout */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color 0.5s ease;
}

/* Background Ambient Glows */
.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    opacity: 0.25;
    pointer-events: none;
    transition: all 0.5s ease;
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    top: -150px;
    left: -100px;
}

.glow-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--accent-secondary) 0%, transparent 70%);
    bottom: -100px;
    right: -100px;
}

/* Main Dashboard Wrapper */
.app-container {
    width: 100vw;
    height: 100vh;
    max-width: 1600px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* Header styling */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 16px;
    box-shadow: var(--shadow-soft), var(--shadow-inset);
    z-index: 10;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 1.8rem;
    color: var(--accent);
    filter: drop-shadow(0 0 8px var(--accent-glow));
    animation: pulse 3s infinite ease-in-out;
}

.logo h1 {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 6px;
}

.logo-badge {
    font-size: 0.7rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    -webkit-text-fill-color: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 6px;
    font-weight: 900;
    letter-spacing: 0.5px;
}

.status-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--accent-secondary);
    box-shadow: 0 0 8px var(--accent-secondary-glow);
    display: inline-block;
    transition: var(--transition-smooth);
}

.status-dot.active {
    background-color: #22c55e;
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.5);
    animation: blink 1.5s infinite;
}

/* Layout Panels */
.main-layout {
    flex: 1;
    display: grid;
    grid-template-columns: 320px 1fr 340px;
    gap: 15px;
    min-height: 0; /* Important to enable internal scrolling on cards */
}

/* Sidebar Panels */
.side-panel {
    display: flex;
    flex-direction: column;
    gap: 15px;
    overflow-y: auto;
    padding-right: 4px; /* for custom scrollbar spacing */
}

/* Scrollbar styles for side panels */
.side-panel::-webkit-scrollbar {
    width: 6px;
}
.side-panel::-webkit-scrollbar-track {
    background: transparent;
}
.side-panel::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}
.side-panel::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Glassmorphism Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 18px;
    padding: 20px;
    box-shadow: var(--shadow-soft), var(--shadow-inset);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: var(--transition-smooth);
}

.card:hover {
    border-color: var(--card-border-hover);
    box-shadow: var(--shadow-soft), 0 0 15px rgba(99, 102, 241, 0.05);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 8px;
}

.card-header i {
    font-size: 1.1rem;
    color: var(--accent);
}

.card-header h2 {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0.3px;
}

/* Speedcubing Timer Card */
.timer-card {
    text-align: center;
    position: relative;
    overflow: hidden;
}

.timer-display {
    font-family: var(--font-mono);
    font-size: 3.2rem;
    font-weight: 400;
    color: var(--text-primary);
    text-shadow: 0 0 15px var(--accent-glow);
    padding: 10px 0;
    margin: 5px 0;
    letter-spacing: -1px;
    transition: var(--transition-smooth);
}

.timer-display.running {
    color: var(--accent-secondary);
    text-shadow: 0 0 15px var(--accent-secondary-glow);
}

.timer-display.inspection {
    color: #eab308; /* Yellow */
    text-shadow: 0 0 15px rgba(234, 179, 8, 0.3);
}

.timer-display.ready {
    color: #22c55e; /* Green */
    text-shadow: 0 0 15px rgba(34, 197, 94, 0.4);
    transform: scale(1.05);
}

.timer-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 15px;
}

.timer-hint span {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    padding: 1px 6px;
    font-family: var(--font-mono);
}

.timer-controls {
    display: flex;
    gap: 10px;
}

/* Buttons */
.btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: 10px;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition-smooth);
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #4f46e5);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(79, 70, 229, 0.5);
    filter: brightness(1.1);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.15);
}

.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn-outline:hover:not(:disabled) {
    background: rgba(99, 102, 241, 0.1);
    box-shadow: 0 0 10px var(--accent-glow);
}

.btn-outline:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.btn-text-danger {
    background: transparent;
    color: #ef4444;
    border: none;
    font-size: 0.8rem;
    padding: 6px;
}

.btn-text-danger:hover {
    background: rgba(239, 68, 68, 0.08);
    text-decoration: underline;
}

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.stat-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 12px;
    padding: 10px 14px;
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.stat-value {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: var(--font-sans);
}

#valTPS, #valBestTime, #valAvg5 {
    font-family: var(--font-mono);
}

/* History List */
.history-section h3 {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 600;
}

.history-list-wrapper {
    max-height: 150px;
    overflow-y: auto;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.history-list-wrapper::-webkit-scrollbar {
    width: 4px;
}
.history-list-wrapper::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 2px;
}

.history-list {
    list-style: none;
}

.history-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    font-size: 0.8rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
}

.history-list li:last-child {
    border-bottom: none;
}

.history-empty {
    color: var(--text-muted);
    text-align: center;
    justify-content: center !important;
    padding: 16px !important;
    font-style: italic;
}

.history-time {
    font-family: var(--font-mono);
    font-weight: bold;
    color: var(--accent);
}

.history-index {
    color: var(--text-muted);
}

.history-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    gap: 8px;
}

.history-meta span {
    font-family: var(--font-mono);
}

/* Center Canvas Container */
.canvas-container {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    background: radial-gradient(circle at center, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-soft), var(--shadow-inset);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

#threeCanvasContainer {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    cursor: grab;
}

#threeCanvasContainer:active {
    cursor: grabbing;
}

/* Canvas Viewport Controls Overlay */
.viewport-controls {
    position: absolute;
    bottom: 20px;
    right: 20px;
    display: flex;
    gap: 8px;
    z-index: 5;
}

.viewport-controls button {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: rgba(17, 17, 38, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    backdrop-filter: blur(8px);
    transition: var(--transition-smooth);
}

.viewport-controls button:hover {
    color: var(--text-primary);
    border-color: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
    transform: translateY(-2px);
}

.viewport-controls button.active {
    color: var(--accent);
    border-color: var(--accent);
}

/* Tip Overlay on Canvas */
.canvas-overlay-tip {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(17, 17, 38, 0.85);
    border: 1px solid var(--card-border);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-soft);
    z-index: 5;
    transition: opacity 0.5s ease, transform 0.5s ease;
    max-width: 90%;
    text-align: center;
}

.canvas-overlay-tip.fade-out {
    opacity: 0;
    transform: translate(-50%, -10px);
    pointer-events: none;
}

.canvas-overlay-tip i {
    color: var(--accent-secondary);
}

.btn-close-tip {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    margin-left: 5px;
    transition: color 0.2s;
}

.btn-close-tip:hover {
    color: var(--text-primary);
}

/* Layer Rotation Controls */
.section-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: -10px;
    margin-bottom: 15px;
    line-height: 1.3;
}

.moves-control-panel {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 18px;
}

.move-group {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.015);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    padding: 6px 10px;
}

.group-label {
    width: 48px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-row {
    flex: 1;
    display: flex;
    gap: 6px;
}

.btn-move {
    flex: 1;
    height: 32px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-move:hover {
    background: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
    transform: translateY(-1px);
}

.btn-move:active {
    transform: translateY(1px);
}

.btn-move.special {
    background: rgba(255, 255, 255, 0.01);
    color: var(--text-secondary);
}

.btn-move.special:hover {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
    color: #ffffff;
    box-shadow: 0 0 8px var(--accent-secondary-glow);
}

.solver-actions {
    display: flex;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 12px;
}

/* Customizations Settings */
.setting-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 12px;
}

.setting-item:last-child {
    margin-bottom: 0;
}

.setting-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.setting-item label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
}

#speedValue {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
}

.form-select {
    width: 100%;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    outline: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.form-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}

.form-select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Range input styling */
.form-range {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
}

.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 8px var(--accent-glow);
    transition: transform 0.1s;
}

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

/* Shortcuts list */
.shortcuts-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.shortcuts-list li {
    display: flex;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.shortcuts-list kbd {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
    padding: 2px 6px;
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-primary);
    margin-right: 4px;
    font-size: 0.7rem;
    box-shadow: 0 1px 0 rgba(0,0,0,0.5);
}

.shortcuts-list span {
    margin-left: auto;
    color: var(--text-muted);
}

/* Keyframes animations */
@keyframes pulse {
    0%, 100% {
        opacity: 0.8;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
        filter: drop-shadow(0 0 12px var(--accent-glow));
    }
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Responsive styles */
@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 280px 1fr;
    }
    .right-panel {
        grid-column: span 2;
        flex-direction: row;
        overflow-y: visible;
    }
    .right-panel .card {
        flex: 1;
    }
}

@media (max-width: 900px) {
    .app-container {
        height: auto;
        overflow-y: auto;
        padding: 10px;
    }
    .main-layout {
        grid-template-columns: 1fr;
        height: auto;
    }
    .side-panel {
        overflow-y: visible;
        height: auto;
    }
    .canvas-container {
        height: 50vh;
        min-height: 350px;
    }
    .right-panel {
        flex-direction: column;
    }
}