:root{--primary: #15803d;--primary-hover: #166534;--secondary: #2563eb;--secondary-hover: #1d4ed8;--bg-color: #e2e8f0;--panel-bg: #ffffff;--text-color: #1e293b;--text-muted: #64748b;--border-color: #cbd5e1;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .06);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .08), 0 2px 4px -2px rgba(0, 0, 0, .06);--success: #16a34a;--danger: #dc2626;--warning: #f59e0b;--warning-bg: #fef3c7}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color);display:flex;flex-direction:column;min-height:100vh}.app-header{text-align:center;padding:1.25rem 1.5rem;background-color:var(--panel-bg);color:var(--text-color);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-sm)}.app-header h1{margin:0 0 .25rem;font-size:1.75rem;font-weight:600;letter-spacing:-.02em}.app-header .tagline{color:var(--text-muted);margin:0;font-size:.9375rem}.controls-row{display:flex;gap:.5rem;justify-content:center;flex-wrap:wrap}.btn{padding:.5rem 1rem;border:1px solid var(--border-color);background-color:var(--panel-bg);color:var(--text-color);border-radius:.25rem;cursor:pointer;font-size:1rem;transition:all .2s}.btn:hover{background-color:var(--bg-color)}.btn-primary{background-color:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary:hover{background-color:var(--primary-hover)}.btn-secondary{background-color:var(--secondary);color:#fff;border-color:var(--secondary)}.btn-secondary:hover{background-color:var(--secondary-hover)}.btn.active{background-color:var(--border-color)}.main-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem;padding:2rem;flex:1;max-width:1200px;margin:0 auto;width:100%}.cube-panel{display:flex;flex-direction:column;align-items:center;background-color:var(--panel-bg);padding:1.5rem;border-radius:.5rem;border:1px solid var(--border-color);box-shadow:var(--shadow-md)}.cube-player-wrap{position:relative;width:100%;max-width:400px;aspect-ratio:1}twisty-player{width:100%;height:100%}.scramble-section{width:100%;max-width:400px;margin-top:1rem;padding:.5rem .75rem;background:var(--bg-color);border-radius:.25rem;border:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;gap:.5rem;box-sizing:border-box}.scramble-text{font-family:monospace;font-size:1.05rem;word-break:break-word}.btn-icon{background:none;border:none;cursor:pointer;font-size:1.2rem;padding:.2rem}#btn-copy-scramble{font-size:1.35rem;padding:.4rem .5rem;min-width:2.25rem;min-height:2.25rem;display:inline-flex;align-items:center;justify-content:center;border-radius:.25rem}#btn-copy-scramble .material-symbols-outlined{font-size:1.35rem}#btn-copy-scramble:hover{background:var(--border-color)}#btn-copy-scramble.copied .material-symbols-outlined{color:var(--success)}.info-panel{background-color:var(--panel-bg);border-radius:.5rem;border:1px solid var(--border-color);box-shadow:var(--shadow-md);display:flex;flex-direction:column;overflow:hidden;padding:1.5rem}.parity-banner{background-color:var(--warning-bg);color:var(--warning);padding:1rem;border-radius:.25rem;margin-bottom:1rem;border:1px solid #fcd34d}#solution-section .controls-row{justify-content:flex-start;margin-bottom:1rem}.phase-section{margin-bottom:2rem}.phase-section h2{margin-top:0;font-size:1.2rem;border-bottom:1px solid var(--border-color);padding-bottom:.5rem}.phase-section h2 small{font-weight:400;color:var(--text-muted);font-size:.9rem}.memo-line{display:flex;align-items:center;gap:1rem;margin-bottom:1rem;background:var(--bg-color);padding:.5rem 1rem;border-radius:.25rem}.memo-letters{font-family:monospace;font-size:1.2rem;font-weight:700;letter-spacing:.2em}.memo-letters.hidden{filter:blur(5px);user-select:none}.btn-sm{padding:.25rem .5rem;font-size:.8rem;border:1px solid var(--border-color);background:var(--panel-bg);border-radius:.25rem;cursor:pointer}.app-footer{text-align:center;padding:1rem;color:var(--text-muted);font-size:.9rem;border-top:1px solid var(--border-color);background:var(--panel-bg)}@media(max-width:768px){.main-grid{grid-template-columns:1fr}}