/* ═══════════════════════════════════════════════════════════════════
   TWISTY PUZZLE MASTER - Cyberpunk Neon Theme
   ═══════════════════════════════════════════════════════════════════ */

:root {
    --bg-deep: #0a0a0f;
    --bg-dark: #12121a;
    --bg-panel: rgba(18, 18, 26, 0.85);
    --neon-cyan: #00f5ff;
    --neon-magenta: #ff00aa;
    --neon-yellow: #f0ff00;
    --neon-green: #00ff88;
    --text-primary: #e8e8ff;
    --text-secondary: #8888aa;
    --border-glow: rgba(0, 245, 255, 0.3);
    --shadow-neon: 0 0 20px rgba(0, 245, 255, 0.4);
}

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

body {
    font-family: 'Exo 2', sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    overflow: hidden;
    min-height: 100vh;
}

/* ═══════════════════════════════════════════════════════════════════
   LOADING SCREEN
   ═══════════════════════════════════════════════════════════════════ */

#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-deep);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

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

.loader {
    perspective: 200px;
}

.cube-loader {
    width: 60px;
    height: 60px;
    position: relative;
    transform-style: preserve-3d;
    animation: rotateCube 2s infinite linear;
}

.cube-loader .face {
    position: absolute;
    width: 60px;
    height: 60px;
    border: 2px solid var(--neon-cyan);
    background: rgba(0, 245, 255, 0.1);
    box-shadow: inset 0 0 20px rgba(0, 245, 255, 0.3);
}

.cube-loader .front { transform: translateZ(30px); }
.cube-loader .back { transform: rotateY(180deg) translateZ(30px); }
.cube-loader .right { transform: rotateY(90deg) translateZ(30px); }
.cube-loader .left { transform: rotateY(-90deg) translateZ(30px); }
.cube-loader .top { transform: rotateX(90deg) translateZ(30px); }
.cube-loader .bottom { transform: rotateX(-90deg) translateZ(30px); }

@keyframes rotateCube {
    0% { transform: rotateX(0deg) rotateY(0deg); }
    100% { transform: rotateX(360deg) rotateY(360deg); }
}

.loading-text {
    margin-top: 30px;
    font-family: 'Orbitron', monospace;
    font-size: 1.2rem;
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-cyan);
    animation: pulse 1.5s infinite;
}

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

/* ═══════════════════════════════════════════════════════════════════
   MAIN CONTAINER
   ═══════════════════════════════════════════════════════════════════ */

#game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    background: 
        radial-gradient(ellipse at 20% 80%, rgba(0, 245, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(255, 0, 170, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(18, 18, 26, 1) 0%, var(--bg-deep) 100%);
}

#puzzle-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* ═══════════════════════════════════════════════════════════════════
   TOP BAR
   ═══════════════════════════════════════════════════════════════════ */

#top-bar {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 40px;
    padding: 15px 40px;
    background: var(--bg-panel);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glow);
    border-top: none;
    border-radius: 0 0 20px 20px;
    box-shadow: var(--shadow-neon);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 1.8rem;
    color: var(--neon-cyan);
    text-shadow: 0 0 15px var(--neon-cyan);
    animation: logoGlow 2s infinite alternate;
}

@keyframes logoGlow {
    0% { text-shadow: 0 0 10px var(--neon-cyan); }
    100% { text-shadow: 0 0 25px var(--neon-cyan), 0 0 40px var(--neon-cyan); }
}

.logo-text {
    font-family: 'Orbitron', monospace;
    font-weight: 900;
    font-size: 1.3rem;
    letter-spacing: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.timer-display, .moves-display {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.timer-label, .moves-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
}

#timer, #moves {
    font-family: 'Orbitron', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neon-yellow);
    text-shadow: 0 0 10px var(--neon-yellow);
}

/* ═══════════════════════════════════════════════════════════════════
   SIDE PANELS
   ═══════════════════════════════════════════════════════════════════ */

#puzzle-selector, #controls-panel {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    padding: 25px;
    background: var(--bg-panel);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glow);
    box-shadow: var(--shadow-neon);
}

#puzzle-selector {
    left: 20px;
    border-radius: 0 20px 20px 0;
    border-left: 3px solid var(--neon-cyan);
    width: 220px;
}

#controls-panel {
    right: 20px;
    border-radius: 20px 0 0 20px;
    border-right: 3px solid var(--neon-magenta);
    width: 220px;
}

#puzzle-selector h2, #controls-panel h2 {
    font-family: 'Orbitron', monospace;
    font-size: 0.9rem;
    letter-spacing: 3px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-glow);
    color: var(--neon-cyan);
}

#controls-panel h2 {
    color: var(--neon-magenta);
}

.category {
    margin-bottom: 25px;
}

.category h3 {
    font-size: 0.75rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
    margin-bottom: 12px;
}



#cube-size-label {
    display: block;
    margin-top: 8px;
    font-family: 'Orbitron', monospace;
    font-size: 1rem;
    color: var(--neon-cyan);
    text-shadow: 0 0 8px var(--neon-cyan);
}

/* Puzzle Buttons */
.puzzle-btn {
    width: 100%;
    padding: 12px 15px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid transparent;
    border-radius: 10px;
    color: var(--text-primary);
    font-family: 'Exo 2', sans-serif;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.puzzle-btn:hover {
    background: rgba(0, 245, 255, 0.1);
    border-color: var(--neon-cyan);
    transform: translateX(5px);
}

.puzzle-btn.active {
    background: rgba(0, 245, 255, 0.15);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 15px rgba(0, 245, 255, 0.3);
}

.btn-icon {
    width: 30px;
    height: 30px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cube-icon {
    background: linear-gradient(135deg, #ff6b35 25%, #fff 25%, #fff 50%, #009ddc 50%, #009ddc 75%, #fff 75%);
    background-size: 15px 15px;
    border: 2px solid var(--text-secondary);
}

.pyramid-icon {
    width: 0;
    height: 0;
    border-left: 15px solid transparent;
    border-right: 15px solid transparent;
    border-bottom: 26px solid var(--neon-green);
    background: none;
}

.dodeca-icon {
    background: var(--neon-magenta);
    clip-path: polygon(50% 0%, 100% 38%, 82% 100%, 18% 100%, 0% 38%);
}

/* ═══════════════════════════════════════════════════════════════════
   ACTION BUTTONS
   ═══════════════════════════════════════════════════════════════════ */

.control-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 25px;
}

.action-btn {
    position: relative;
    padding: 12px 20px;
    background: transparent;
    border: 2px solid var(--neon-magenta);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: 'Orbitron', monospace;
    font-size: 0.8rem;
    letter-spacing: 1px;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.3s ease;
}

.action-btn .btn-glow {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 0, 170, 0.3), transparent);
    transition: left 0.5s ease;
}

.action-btn:hover .btn-glow {
    left: 100%;
}

.action-btn:hover {
    background: rgba(255, 0, 170, 0.15);
    box-shadow: 0 0 20px rgba(255, 0, 170, 0.4);
    transform: scale(1.02);
}

.action-btn .btn-content {
    position: relative;
    z-index: 1;
}

.action-btn.large {
    padding: 18px 40px;
    font-size: 1rem;
}

/* ═══════════════════════════════════════════════════════════════════
   INSTRUCTIONS & KEYBOARD SHORTCUTS
   ═══════════════════════════════════════════════════════════════════ */

.instructions, .keyboard-shortcuts {
    margin-bottom: 20px;
}

.instructions h3, .keyboard-shortcuts h3 {
    font-size: 0.75rem;
    color: var(--neon-magenta);
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.instructions ul {
    list-style: none;
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.instructions li strong {
    color: var(--text-primary);
}

.key-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 10px;
}

.key-item {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

kbd {
    display: inline-block;
    padding: 3px 8px;
    margin-right: 5px;
    background: var(--bg-dark);
    border: 1px solid var(--border-glow);
    border-radius: 4px;
    font-family: 'Orbitron', monospace;
    font-size: 0.7rem;
    color: var(--neon-cyan);
}

.key-hint {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* ═══════════════════════════════════════════════════════════════════
   SOLVED MODAL
   ═══════════════════════════════════════════════════════════════════ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.hidden {
    opacity: 0;
    visibility: hidden;
}

.modal-content {
    position: relative;
    padding: 50px 60px;
    background: var(--bg-panel);
    border: 2px solid var(--neon-cyan);
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 0 50px rgba(0, 245, 255, 0.5);
    animation: modalPop 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes modalPop {
    0% { transform: scale(0.5); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.modal-content h2 {
    font-family: 'Orbitron', monospace;
    font-size: 2.5rem;
    margin-bottom: 30px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta), var(--neon-yellow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: rainbow 2s linear infinite;
}

@keyframes rainbow {
    0% { filter: hue-rotate(0deg); }
    100% { filter: hue-rotate(360deg); }
}

.stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 30px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
}

.stat-value {
    font-family: 'Orbitron', monospace;
    font-size: 2rem;
    font-weight: 700;
    color: var(--neon-yellow);
    text-shadow: 0 0 15px var(--neon-yellow);
}

/* Confetti */
.confetti {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

/* ═══════════════════════════════════════════════════════════════════
   GRID BACKGROUND EFFECT
   ═══════════════════════════════════════════════════════════════════ */

#game-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 245, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 245, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

/* ═══════════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════════ */

@media (max-width: 1200px) {
    #puzzle-selector, #controls-panel {
        width: 180px;
        padding: 20px;
    }
}

@media (max-width: 900px) {
    #puzzle-selector {
        left: 10px;
        width: 160px;
        padding: 15px;
    }
    
    #controls-panel {
        right: 10px;
        width: 160px;
        padding: 15px;
    }
    
    #top-bar {
        gap: 20px;
        padding: 10px 20px;
    }
}

@media (max-width: 600px) {
    #puzzle-selector, #controls-panel {
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        transform: none;
        width: 100%;
        border-radius: 20px 20px 0 0;
        border: none;
        border-top: 2px solid var(--neon-cyan);
        max-height: 40vh;
        overflow-y: auto;
    }
    
    #controls-panel {
        display: none;
    }
}