:root{--bg-primary: #0a0a0f;--bg-secondary: #12121a;--bg-tertiary: #1a1a2e;--bg-card: rgba(26, 26, 46, .6);--text-primary: #ffffff;--text-secondary: #a0a0b0;--text-muted: #6b6b7b;--accent-cyan: #00d4ff;--accent-magenta: #ff00ff;--accent-purple: #8b5cf6;--accent-green: #00ff88;--accent-red: #ff3366;--accent-yellow: #ffeb3b;--accent-orange: #ff9800;--glow-cyan: 0 0 10px rgba(0, 212, 255, .5), 0 0 20px rgba(0, 212, 255, .3);--glow-magenta: 0 0 10px rgba(255, 0, 255, .5), 0 0 20px rgba(255, 0, 255, .3);--glow-red: 0 0 10px rgba(255, 51, 102, .5), 0 0 20px rgba(255, 51, 102, .3);--glow-green: 0 0 10px rgba(0, 255, 136, .5), 0 0 20px rgba(0, 255, 136, .3);--border-color: rgba(255, 255, 255, .1);--border-hover: rgba(0, 212, 255, .5);--shadow-sm: 0 2px 4px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .5);--shadow-glow: 0 0 30px rgba(0, 212, 255, .1);--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .35s ease;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--font-ui: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", "SF Mono", Consolas, monospace}[data-theme=light]{--bg-primary: #f8f9fa;--bg-secondary: #ffffff;--bg-tertiary: #e9ecef;--bg-card: rgba(255, 255, 255, .8);--text-primary: #1a1a2e;--text-secondary: #4a5568;--text-muted: #718096;--accent-cyan: #0891b2;--accent-magenta: #c026d3;--accent-purple: #7c3aed;--accent-green: #059669;--accent-red: #dc2626;--accent-yellow: #ca8a04;--accent-orange: #ea580c;--glow-cyan: 0 0 8px rgba(8, 145, 178, .3);--glow-magenta: 0 0 8px rgba(192, 38, 211, .3);--glow-red: 0 0 8px rgba(220, 38, 38, .3);--glow-green: 0 0 8px rgba(5, 150, 105, .3);--border-color: rgba(0, 0, 0, .1);--border-hover: rgba(8, 145, 178, .5);--shadow-sm: 0 2px 4px rgba(0, 0, 0, .05);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .12);--shadow-glow: 0 0 20px rgba(8, 145, 178, .08)}*{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-ui);background:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.5;transition:background-color var(--transition-base);background-image:radial-gradient(circle at 20% 50%,rgba(0,212,255,.03) 0%,transparent 50%),radial-gradient(circle at 80% 80%,rgba(255,0,255,.03) 0%,transparent 50%)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb:hover{background:var(--accent-cyan)}::selection{background:var(--accent-cyan);color:var(--bg-primary)}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse-glow{0%,to{box-shadow:var(--glow-cyan)}50%{box-shadow:0 0 20px #00d4ffcc,0 0 40px #00d4ff66}}@keyframes explode{0%{transform:scale(1)}50%{transform:scale(1.2)}to{transform:scale(1)}}@keyframes flag-wave{0%,to{transform:rotate(0)}25%{transform:rotate(-5deg)}75%{transform:rotate(5deg)}}@keyframes slideIn{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}@media(max-width:768px){html{font-size:14px}}.theme-toggle{position:fixed;top:20px;right:20px;z-index:1000;background:var(--bg-card);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:10px 16px;cursor:pointer;display:flex;align-items:center;gap:8px;font-family:var(--font-ui);font-size:.875rem;color:var(--text-secondary);transition:all var(--transition-base);box-shadow:var(--shadow-md)}.theme-toggle:hover{border-color:var(--border-hover);box-shadow:var(--glow-cyan),var(--shadow-md);color:var(--text-primary)}.theme-toggle__icon{font-size:1.125rem;transition:transform var(--transition-base)}.theme-toggle:hover .theme-toggle__icon{transform:rotate(180deg)}.game-header{text-align:center;margin-bottom:2rem;animation:fadeIn var(--transition-slow)}.game-title{font-size:2.5rem;font-weight:700;background:linear-gradient(135deg,var(--accent-cyan),var(--accent-magenta));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem;letter-spacing:-.02em}.game-subtitle{color:var(--text-secondary);font-size:.875rem}.game-menu{margin-bottom:1.5rem;animation:slideIn var(--transition-slow)}.level-selector{display:flex;justify-content:center;gap:.75rem;list-style:none;padding:0;flex-wrap:wrap}.level-button{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:.625rem 1.5rem;color:var(--text-secondary);font-family:var(--font-ui);font-size:.875rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast);position:relative;overflow:hidden}.level-button:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.1),transparent);transition:left var(--transition-slow)}.level-button:hover{border-color:var(--accent-cyan);color:var(--accent-cyan);transform:translateY(-2px);box-shadow:var(--glow-cyan)}.level-button:hover:before{left:100%}.level-button:active{transform:translateY(0)}.level-button.active{background:#00d4ff26;border-color:var(--accent-cyan);color:var(--accent-cyan);box-shadow:var(--glow-cyan)}.level-button.active:before{left:100%}.game-board-container{background:var(--bg-card);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:2rem;box-shadow:var(--shadow-lg),var(--shadow-glow);animation:fadeIn var(--transition-slow) .1s both}.status-dashboard{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-bottom:1.5rem;padding:1rem;background:var(--bg-tertiary);border-radius:var(--radius-lg);border:1px solid var(--border-color)}.status-item{display:flex;flex-direction:column;align-items:center;gap:.25rem}.status-label{font-size:.625rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);font-weight:600}.status-value{font-family:var(--font-mono);font-size:1.25rem;font-weight:700;color:var(--text-primary)}.status-value--timer{color:var(--accent-cyan);text-shadow:0 0 10px rgba(0,212,255,.3)}.status-value--bombs{color:var(--accent-magenta)}.status-value--completed{color:var(--accent-green)}.status-value--completed:not(.completed){color:var(--text-muted)}.game-board{display:inline-flex;flex-direction:column;gap:1px;background:var(--bg-tertiary);padding:1px;border-radius:var(--radius-md);overflow:hidden}.board-row{display:flex;gap:1px}.mine-square{width:40px;height:40px;background:var(--bg-secondary);border:none;display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:1rem;font-weight:700;cursor:pointer;transition:all var(--transition-fast);position:relative;overflow:hidden;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}.mine-square[aria-disabled=true]{cursor:not-allowed;opacity:.7}.mine-square:hover:not(.revealed):not(.exploded){background:var(--bg-tertiary);box-shadow:inset 0 0 10px #00d4ff33}.mine-square:focus-visible{outline:2px solid var(--accent-cyan);outline-offset:-2px}.mine-square.revealed{background:var(--bg-tertiary);cursor:default}.mine-square.flagged{animation:flag-wave .5s ease}.mine-square.exploded{background:var(--accent-red);animation:explode .3s ease;box-shadow:var(--glow-red)}.mine-square.exploded .fa-bomb{color:#fff;filter:drop-shadow(0 0 4px rgba(255,255,255,.8))}.mine-count-1{color:var(--accent-cyan)}.mine-count-2{color:var(--accent-green)}.mine-count-3{color:var(--accent-red)}.mine-count-4{color:var(--accent-purple)}.mine-count-5{color:var(--accent-magenta)}.mine-count-6{color:var(--accent-yellow)}.mine-count-7{color:#ff6b6b}.mine-count-8{color:#4ecdc4}.mine-square .fa-flag{color:var(--accent-magenta);filter:drop-shadow(0 0 4px rgba(255,0,255,.5))}.mine-square .fa-bomb{color:var(--accent-red);filter:drop-shadow(0 0 4px rgba(255,51,102,.5))}.game-status{margin-top:1.5rem;padding:1rem;text-align:center;border-radius:var(--radius-md);font-weight:600;animation:fadeIn var(--transition-base)}.game-status.win{background:#00ff881a;border:1px solid var(--accent-green);color:var(--accent-green);box-shadow:var(--glow-green)}.game-status.lose{background:#ff33661a;border:1px solid var(--accent-red);color:var(--accent-red);box-shadow:var(--glow-red)}.instructions{margin-top:2rem;padding:1.5rem;background:var(--bg-card);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border-color);border-radius:var(--radius-lg);max-width:500px;animation:fadeIn var(--transition-slow) .2s both}.instructions h3{font-size:.875rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);margin-bottom:.75rem}.instructions ol{padding-left:1.25rem;color:var(--text-secondary);font-size:.875rem}.instructions li{margin-bottom:.5rem;line-height:1.6}.instructions li::marker{color:var(--accent-cyan)}.game-container{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:2rem 1rem}@media(max-width:768px){.game-board-container{padding:1rem}.mine-square{width:32px;height:32px;font-size:.875rem}.status-dashboard{grid-template-columns:1fr;gap:.75rem}.game-title{font-size:2rem}.level-selector{gap:.5rem}.level-button{padding:.5rem 1rem;font-size:.8125rem}}@media(max-width:480px){.mine-square{width:28px;height:28px;font-size:.75rem}}