:root{--bg-primary: #f5f5f7;--bg-secondary: #ffffff;--bg-tertiary: #e5e5ea;--bg-surface: rgba(255, 255, 255, .85);--bg-glass: rgba(255, 255, 255, .72);--border-color: rgba(0, 0, 0, .08);--border-subtle: rgba(0, 0, 0, .04);--border-highlight: rgba(0, 0, 0, .16);--text-primary: #1c1c1e;--text-secondary: #636366;--text-tertiary: #8e8e93;--text-inverse: #ffffff;--accent-quartile: #d97706;--accent-quartile-gradient: linear-gradient(135deg, #f59e0b, #d97706);--accent-quartile-glow: rgba(245, 158, 11, .35);--accent-submit: #10b981;--accent-submit-gradient: linear-gradient(135deg, #34d399, #059669);--accent-submit-glow: rgba(16, 185, 129, .3);--accent-blue: #0284c7;--accent-blue-gradient: linear-gradient(135deg, #38bdf8, #0284c7);--accent-purple: #6366f1;--accent-danger: #ef4444;--tile-bg: #ffffff;--tile-bg-hover: #fcfcfd;--tile-bg-active: #ebebed;--tile-text: #1d1d1f;--tile-border: #d2d2d7;--tile-shadow: 0 2px 4px rgba(0, 0, 0, .06), 0 1px 2px rgba(0, 0, 0, .04);--tile-shadow-hover: 0 4px 8px rgba(0, 0, 0, .08), 0 2px 4px rgba(0, 0, 0, .04);--tile-shadow-selected: inset 0 2px 4px rgba(0, 0, 0, .06);--radius-xs: 6px;--radius-sm: 10px;--radius-md: 14px;--radius-lg: 18px;--radius-full: 9999px;--ease-spring: cubic-bezier(.175, .885, .32, 1.275);--ease-smooth: cubic-bezier(.16, 1, .3, 1);--transition-fast: .15s ease;--transition-normal: .25s var(--ease-smooth)}[data-theme=dark]{--bg-primary: #000000;--bg-secondary: #1c1c1e;--bg-tertiary: #2c2c2e;--bg-surface: rgba(28, 28, 30, .88);--bg-glass: rgba(28, 28, 30, .75);--border-color: rgba(255, 255, 255, .12);--border-subtle: rgba(255, 255, 255, .06);--border-highlight: rgba(255, 255, 255, .24);--text-primary: #f5f5f7;--text-secondary: #a1a1a6;--text-tertiary: #6e6e73;--text-inverse: #000000;--tile-bg: #2c2c2e;--tile-bg-hover: #3a3a3c;--tile-bg-active: #1c1c1e;--tile-text: #f5f5f7;--tile-border: rgba(255, 255, 255, .14);--tile-shadow: 0 3px 6px rgba(0, 0, 0, .4);--tile-shadow-hover: 0 6px 14px rgba(0, 0, 0, .55);--tile-shadow-selected: inset 0 2px 4px rgba(0, 0, 0, .5);--accent-quartile: #f59e0b;--accent-quartile-glow: rgba(245, 158, 11, .45)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}body{font-family:-apple-system,BlinkMacSystemFont,Inter,SF Pro Text,SF Pro Icons,Helvetica Neue,Helvetica,Arial,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.45;letter-spacing:-.01em;min-height:100vh;overflow-x:hidden;transition:background-color var(--transition-normal),color var(--transition-normal);display:flex;flex-direction:column}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;outline:none}.app-container{display:flex;flex-direction:column;width:100%;max-width:480px;margin:0 auto;min-height:100vh;padding:6px 14px 16px;position:relative;justify-content:flex-start}@media(min-width:768px){.app-container{max-width:480px;padding:10px 16px 20px}}.word-builder-wrapper{margin:6px 0 10px;position:relative;z-index:10}.word-builder{min-height:52px;background:var(--bg-surface);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border:1.5px solid var(--border-color);border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:space-between;padding:4px 8px;box-shadow:0 4px 16px #0000000a;transition:all var(--transition-normal)}.word-builder.has-tiles{border-color:var(--border-highlight);box-shadow:0 6px 20px #00000014}.word-builder.invalid-shake{animation:shake .45s cubic-bezier(.36,.07,.19,.97) both;border-color:var(--accent-danger)}@keyframes shake{10%,90%{transform:translate3d(-2px,0,0)}20%,80%{transform:translate3d(4px,0,0)}30%,50%,70%{transform:translate3d(-6px,0,0)}40%,60%{transform:translate3d(6px,0,0)}}.active-tiles-container{display:flex;align-items:center;gap:5px;flex:1;min-width:0;min-height:44px;overflow:visible;padding:2px}.builder-placeholder{color:var(--text-tertiary);font-size:.9rem;font-weight:500;letter-spacing:-.01em;padding-left:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.active-tile-chip{display:inline-flex;align-items:center;justify-content:center;padding:6px 10px;background:var(--tile-bg);color:var(--text-primary);border:1.5px solid var(--tile-border);border-radius:var(--radius-md);font-size:1.02rem;font-weight:700;letter-spacing:.02em;box-shadow:var(--tile-shadow);cursor:grab;position:relative;transition:transform var(--transition-fast),background var(--transition-fast),border-color var(--transition-fast);animation:chipInsert .22s var(--ease-spring);flex:0 1 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var(--transition-fast)}.btn-primary-modal:hover{transform:translateY(-1px)}