:root{--color-bg: #0b1120;--color-surface: #1e293b;--color-surface-alt: #2f3f58;--color-border: #475569;--color-text: #f8fafc;--color-text-dim: #cbd5e1;--color-primary: #38bdf8;--color-primary-text: #0f172a;--color-danger: #f87171;--color-good: #4ade80;--safe-bottom: env(safe-area-inset-bottom, 0px);--safe-top: env(safe-area-inset-top, 0px);--nav-height: 60px}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--color-bg);color:var(--color-text);font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-tap-highlight-color:transparent}#app{min-height:100vh}button{font-family:inherit;color:inherit}a{color:inherit;text-decoration:none}.app-shell{max-width:480px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column;background:var(--color-bg)}.page{flex:1;width:100%;padding:calc(16px + var(--safe-top)) 16px calc(var(--nav-height) + 24px + var(--safe-bottom))}.page--no-nav{padding-bottom:calc(16px + var(--safe-bottom))}h1{font-size:1.4rem;margin:0 0 16px}h2{font-size:1.1rem;margin:0 0 12px}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:14px;padding:16px;margin-bottom:12px}.btn{display:inline-flex;align-items:center;justify-content:center;width:100%;min-height:48px;border-radius:12px;border:none;font-size:1rem;font-weight:600;background:var(--color-primary);color:var(--color-primary-text);cursor:pointer}.btn:active{opacity:.85}.btn--secondary{background:var(--color-surface-alt);color:var(--color-text);border:1px solid var(--color-border)}.btn--ghost{background:transparent;color:var(--color-primary);border:1px solid var(--color-primary)}.field{margin-bottom:14px}.field label{display:block;font-size:.85rem;color:var(--color-text-dim);margin-bottom:6px}.field input,.field textarea{width:100%;min-height:48px;padding:10px 14px;border-radius:10px;border:1px solid var(--color-border);background:var(--color-surface-alt);color:var(--color-text);font-size:1rem}.error-text{color:var(--color-danger);font-size:.9rem;margin:-6px 0 14px}.list-row{display:flex;align-items:center;justify-content:space-between;width:100%;min-height:56px;padding:12px 14px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;margin-bottom:10px}.list-row:active{background:var(--color-surface-alt)}.pill{display:inline-block;font-size:.75rem;padding:3px 10px;border-radius:999px;background:#38bdf829;border:1px solid rgba(56,189,248,.4);color:#7dd3fc;font-weight:600}.bottom-nav{position:fixed;left:0;right:0;bottom:0;height:calc(var(--nav-height) + var(--safe-bottom));padding-bottom:var(--safe-bottom);max-width:480px;margin:0 auto;display:flex;background:var(--color-surface);border-top:1px solid var(--color-border)}.bottom-nav a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:.7rem;color:var(--color-text-dim)}.bottom-nav a.router-link-active{color:var(--color-primary)}.bottom-nav .icon{font-size:1.25rem;line-height:1}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:flex-end;justify-content:center;z-index:50}.modal-sheet{width:100%;max-width:480px;background:var(--color-surface);border-radius:20px 20px 0 0;padding:20px 20px calc(24px + var(--safe-bottom));max-height:80vh;overflow-y:auto}.flashcard{min-height:260px;border-radius:20px;background:var(--color-surface);border:1px solid var(--color-border);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px;margin-bottom:20px}.review-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:999px;border:1px solid var(--color-border);background:var(--color-surface-alt);color:var(--color-text);font-size:1.05rem;cursor:pointer;flex-shrink:0}.icon-btn:active{background:var(--color-border)}.empty-state{text-align:center;color:var(--color-text-dim);padding:40px 16px}.clickable-word{cursor:pointer;border-bottom:1px dashed var(--color-primary);border-radius:2px}.clickable-word:active{background:#38bdf833}.lookup-loading{color:var(--color-text-dim);font-size:.85rem;margin-top:6px}.badge-ai{display:inline-flex;align-items:center;font-size:.7rem;font-weight:700;padding:2px 8px;border-radius:999px;background:#c084fc2e;border:1px solid rgba(192,132,252,.5);color:#d8b4fe;white-space:nowrap}.status-pill{display:inline-flex;align-items:center;gap:4px;font-size:.7rem;font-weight:600;padding:2px 8px;border-radius:999px;white-space:nowrap}.status-pill--new{background:var(--color-surface-alt);color:var(--color-text-dim)}.status-pill--learning{background:#38bdf829;color:#7dd3fc}.status-pill--mastered{background:#4ade8029;color:#86efac}