@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";:root{--bg-gradient: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);--glass-bg: rgba(255, 255, 255, .85);--glass-border: rgba(148, 163, 184, .3);--text-main: #334155;--text-muted: #94a3b8;--accent: linear-gradient(45deg, #e2e8f0, #cbd5e1);--accent-hover: linear-gradient(45deg, #cbd5e1, #94a3b8);--danger: #ef4444;--success: #10b981}.dark{--bg-gradient: linear-gradient(135deg, #09090b 0%, #18181b 100%);--glass-bg: rgba(255, 255, 255, .05);--glass-border: rgba(148, 163, 184, .2);--text-main: #f8fafc;--text-muted: #94a3b8;--accent: linear-gradient(45deg, #94a3b8, #cbd5e1);--accent-hover: linear-gradient(45deg, #cbd5e1, #f1f5f9);--danger: #ef4444;--success: #10b981}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,sans-serif;background:var(--bg-gradient);color:var(--text-main);min-height:100vh;overflow-x:hidden;display:flex;flex-direction:column}#root{display:flex;flex-direction:column;min-height:100vh}.app-container{display:flex;flex-direction:column;align-items:center;padding:2rem;max-width:1200px;margin:0 auto;width:100%}.header{text-align:center;margin-bottom:2rem}.header h1{font-size:2.5rem;font-weight:700;background:-webkit-linear-gradient(45deg,#818cf8,#c084fc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:.5rem}.theme-toggle-btn{position:absolute;top:1.5rem;right:1.5rem;background:var(--glass-bg);border:1px solid var(--glass-border);color:var(--text-main);padding:.5rem;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.theme-toggle-btn:hover{transform:rotate(15deg);background:#ffffff1a}.glass-panel{background:var(--glass-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:1rem;padding:1.5rem;box-shadow:0 8px 32px #0000005e}.controls-grid{display:grid;grid-template-columns:1fr;gap:1.5rem;width:100%}@media(min-width:768px){.controls-grid{grid-template-columns:1fr 1fr}}.input-section{display:flex;flex-direction:column;gap:1rem}.input-section h2{font-size:1.2rem;font-weight:600;color:var(--text-main);border-bottom:1px solid var(--glass-border);padding-bottom:.5rem;display:flex;align-items:center;gap:.5rem}.size-controls{display:flex;gap:1rem;align-items:center;margin-bottom:1.5rem;justify-content:center}.size-controls label{display:flex;align-items:center;gap:.5rem}.size-controls input{width:60px;background:#0003;border:1px solid var(--glass-border);color:#fff;padding:.5rem;border-radius:.5rem;text-align:center;font-family:inherit}.clue-list{display:flex;flex-direction:column;gap:.5rem;max-height:300px;overflow-y:auto;padding-right:.5rem}.clue-list::-webkit-scrollbar{width:6px}.clue-list::-webkit-scrollbar-track{background:#0000001a;border-radius:3px}.clue-list::-webkit-scrollbar-thumb{background:var(--glass-border);border-radius:3px}.clue-list::-webkit-scrollbar-thumb:hover{background:#fff3}.clue-item{display:flex;align-items:center;gap:.5rem}.clue-item span{width:25px;font-size:.9rem;color:var(--text-muted)}.clue-item input{flex:1;background:#0003;border:1px solid var(--glass-border);color:#fff;padding:.5rem;border-radius:.5rem;font-family:inherit;transition:all .2s}.clue-item input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px #6366f133}.btn{background:var(--accent);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:.5rem;font-weight:600;cursor:pointer;transition:all .2s ease;font-family:inherit;display:flex;align-items:center;justify-content:center;gap:.5rem;font-size:1rem}.btn:hover{background:var(--accent-hover);transform:translateY(-1px)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.solve-action{margin-top:2rem;display:flex;justify-content:center}.solutions-container{margin-top:3rem;width:100%;display:flex;flex-direction:column;align-items:center;gap:2rem}.solutions-header{font-size:1.5rem;font-weight:600;text-align:center}.solution-wrapper{animation:fadeIn .5s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.d3-grid{border:1px solid var(--glass-border);background:#00000080;border-radius:4px}.interactive-grid-container{display:flex;flex-direction:column;align-items:center;gap:1.5rem;width:auto;margin:0 auto}.interactive-size-controls{display:flex;gap:1rem;align-items:center}.interactive-size-controls label{display:flex;align-items:center;gap:.5rem}.interactive-size-controls input{width:60px;background:#0000004d;border:1px solid var(--glass-border);color:#fff;padding:.5rem;border-radius:.5rem;text-align:center;font-family:inherit;font-size:1rem}.times-symbol{color:var(--text-muted);font-size:1.2rem}.interactive-grid{display:grid;background:var(--glass-border);border:2px solid rgba(255,255,255,.2);gap:1px;padding:1px}.grid-corner{background:#0003}.clue-input-cell{background:#ffffff0d;display:flex}.clue-input-cell input,.clue-input-cell textarea{width:100%;height:100%;background:transparent;border:none;color:var(--text-main);font-family:inherit;font-size:.9rem;outline:none;transition:background .2s}.clue-input-cell input:focus,.clue-input-cell textarea:focus{background:#6366f133}.row-clue-cell input{text-align:right;padding-right:.5rem}.col-clue-cell textarea{text-align:center;padding-top:.5rem;resize:none;-ms-overflow-style:none;scrollbar-width:none}.col-clue-cell textarea::-webkit-scrollbar{display:none}.grid-cell{background:#0006;display:flex;align-items:center;justify-content:center;transition:background .2s}.cell-filled{background:var(--accent)}.cell-crossed{background:#0000001a}.cell-x{color:var(--danger);font-size:1.2rem;font-weight:700}.grid-cell.border-bottom{border-bottom:2px solid rgba(255,255,255,.3)}.grid-cell.border-right{border-right:2px solid rgba(255,255,255,.3)}.grid-helper-text{font-size:.85rem;color:var(--text-muted);text-align:center;max-width:400px}