*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#f5f5f0;--surface:#fff;--border:#e0e0d8;--primary:#2d6a4f;--primary-light:#52b788;--danger:#d62828;--danger-light:#f08080;--text:#1a1a1a;--muted:#6b7280;--radius:12px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}body{background:var(--bg);color:var(--text);min-height:100vh}.app{flex-direction:column;max-width:640px;min-height:100vh;margin:0 auto;padding:0 16px;display:flex}.app-header{border-bottom:1px solid var(--border);padding:24px 0 16px}.app-header h1{color:var(--primary);margin-bottom:12px;font-size:1.5rem;font-weight:700}.mode-nav{gap:8px;display:flex}.mode-nav button{border:2px solid var(--border);background:var(--surface);color:var(--muted);cursor:pointer;border-radius:20px;padding:8px 16px;font-size:.85rem;transition:all .15s}.mode-nav button.active{background:var(--primary);border-color:var(--primary);color:#fff}.mode-nav button:hover:not(.active){border-color:var(--primary-light);color:var(--primary)}.app-main{flex-direction:column;flex:1;align-items:center;padding:32px 0;display:flex}.progress{color:var(--muted);align-self:flex-end;margin-bottom:24px;font-size:.85rem}.flashcard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;align-items:center;gap:20px;width:100%;padding:36px 28px;display:flex;box-shadow:0 2px 8px #0000000f}.card-label{color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-size:.85rem}.card-prompt.english-prompt{color:var(--text);text-align:center;font-size:2.5rem;font-weight:700}.card-hint{color:var(--muted);font-size:.9rem}.synonyms{color:var(--muted);font-size:.8rem;font-style:italic}@keyframes flash-correct{0%{border-color:var(--border);background:#fff}25%{border-color:var(--primary-light);background:#d8f3dc}to{border-color:var(--primary-light);background:#d8f3dc}}@keyframes flash-incorrect{0%{border-color:var(--border);background:#fff}20%{border-color:var(--danger-light);background:#ffe5e5}to{border-color:var(--danger-light);background:#ffe5e5}}.flashcard.flash-correct{animation:1.2s ease-out forwards flash-correct}.flashcard.flash-incorrect{animation:2.5s ease-out forwards flash-incorrect}.answer-actions{align-items:center;gap:10px;display:flex}.dont-know-btn{border:2px solid var(--danger-light);width:48px;height:48px;color:var(--danger);cursor:pointer;background:#fff;border-radius:50%;flex-shrink:0;font-size:1.3rem;font-weight:700;transition:all .15s}.dont-know-btn:hover{background:var(--danger);border-color:var(--danger);color:#fff}.record-btn{border:2px solid var(--primary);color:var(--primary);cursor:pointer;-webkit-user-select:none;user-select:none;background:#fff;border-radius:50px;align-items:center;gap:10px;padding:14px 28px;font-size:1rem;font-weight:600;transition:all .15s;display:flex}.record-btn:hover:not(:disabled){background:var(--primary);color:#fff}.record-btn.recording{background:var(--danger);border-color:var(--danger);color:#fff;animation:1s ease-in-out infinite pulse}.record-btn:disabled{opacity:.4;cursor:not-allowed}.mic-icon{font-size:1.2rem}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.03)}}.play-btn{border:2px solid var(--primary-light);color:var(--primary);cursor:pointer;background:#fff;border-radius:50px;padding:12px 24px;font-size:1rem;font-weight:600;transition:all .15s}.play-btn:hover,.play-btn.playing{background:var(--primary-light);color:#fff}.feedback{border-radius:var(--radius);text-align:center;width:100%;padding:16px 20px;font-size:1rem;font-weight:600}.feedback.correct{color:#1b4332;background:#d8f3dc;border:1.5px solid #b7e4c7}.feedback.incorrect{color:#7f1d1d;background:#ffe5e5;border:1.5px solid #fca5a5}.answer-shown{margin-top:6px;font-size:1.4rem;display:block}.next-btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:50px;padding:12px 28px;font-size:1rem;font-weight:600;transition:background .15s}.next-btn:hover{background:#1b5e3f}.loading{color:var(--muted);flex-direction:column;align-items:center;gap:16px;padding:48px 0;display:flex}.spinner{border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;width:40px;height:40px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.loading-sub{color:var(--muted);font-size:.8rem}.error-msg{color:var(--danger);border:1px solid var(--danger-light);border-radius:var(--radius);text-align:center;background:#ffe5e5;max-width:400px;padding:12px 16px;font-size:.9rem}.header-top{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.header-actions{align-items:center;gap:6px;display:flex}.nav-tab{border:1.5px solid var(--border);color:var(--muted);cursor:pointer;background:0 0;border-radius:20px;padding:5px 14px;font-size:.82rem;font-weight:500;transition:all .15s}.nav-tab.active{background:var(--primary);border-color:var(--primary);color:#fff}.nav-tab:hover:not(.active){border-color:var(--primary-light);color:var(--primary)}.reset-btn{border:1.5px solid var(--border);color:var(--muted);cursor:pointer;background:0 0;border-radius:20px;padding:4px 12px;font-size:.75rem;transition:all .15s}.reset-btn:hover{border-color:var(--danger-light);color:var(--danger)}.profile-page{flex-direction:column;gap:24px;width:100%;display:flex}.summary-grid{flex-wrap:wrap;gap:10px;display:flex}.summary-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;flex:80px;align-items:center;gap:4px;min-width:72px;padding:14px 16px;display:flex}.summary-value{font-size:1.6rem;font-weight:700;line-height:1}.summary-label{color:var(--muted);text-align:center;text-transform:uppercase;letter-spacing:.04em;font-size:.72rem}.summary-overdue{background:#fff5f5;border-color:#fca5a5}.summary-overdue .summary-value{color:var(--danger)}.summary-learning{background:#eff6ff;border-color:#93c5fd}.summary-learning .summary-value{color:#1d4ed8}.summary-mastered{background:#f0fdf4;border-color:#86efac}.summary-mastered .summary-value{color:#15803d}.profile-tabs{flex-wrap:wrap;gap:6px;display:flex}.profile-tab{border:1.5px solid var(--border);color:var(--muted);cursor:pointer;background:#fff;border-radius:20px;align-items:center;gap:5px;padding:6px 14px;font-size:.82rem;font-weight:500;transition:all .15s;display:flex}.profile-tab.active,.profile-tab:hover{border-color:var(--primary);color:var(--primary);background:#f0fdf4}.profile-tab.active{font-weight:700}.profile-tab.tab-overdue.active,.profile-tab.tab-overdue:hover{border-color:var(--danger);color:var(--danger);background:#fff5f5}.profile-tab.tab-mastered.active,.profile-tab.tab-mastered:hover{color:#7c3aed;background:#faf5ff;border-color:#7c3aed}.tab-count{background:var(--border);border-radius:20px;padding:1px 7px;font-size:.72rem;font-weight:700}.profile-tab.active .tab-count{color:#fff;background:currentColor}.word-table{flex-direction:column;gap:6px;display:flex}.word-row{background:var(--surface);border:1px solid var(--border);border-radius:10px;align-items:center;gap:12px;padding:12px 16px;transition:border-color .15s;display:flex}.word-row:hover{border-color:var(--primary-light)}.word-row.status-overdue{border-left:3px solid var(--danger)}.word-row.status-mastered{border-left:3px solid #7c3aed}.word-row.status-learning{border-left:3px solid #3b82f6}.word-row.status-new{border-left:3px solid var(--border)}.word-kana{min-width:80px;font-size:1.1rem;font-weight:600}.word-english{color:var(--muted);flex:1;font-size:.9rem}.word-meta{flex-shrink:0;align-items:center;gap:8px;display:flex}.status-badge{letter-spacing:.05em;text-transform:uppercase;border-radius:20px;padding:2px 8px;font-size:.7rem;font-weight:700}.badge-learning{color:#1e40af;background:#dbeafe}.badge-overdue{color:#991b1b;background:#fee2e2}.badge-mastered{color:#6b21a8;background:#f3e8ff}.word-due{color:var(--muted);text-align:right;min-width:42px;font-size:.75rem}.word-interval{color:var(--muted);text-align:right;min-width:28px;font-size:.72rem}.session-stats{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:20px;display:flex}.stats-pill{border-radius:20px;align-items:baseline;gap:4px;padding:4px 10px;font-size:.8rem;font-weight:600;display:inline-flex}.pill-val{font-size:.95rem}.pill-lbl{opacity:.75;font-weight:400}.pill-due{color:#7f1d1d;background:#ffe5e5}.pill-new{color:#1e3a5f;background:#dbeafe}.pill-session{color:#14532d;background:#f0fdf4}.pill-zero{background:var(--border);color:var(--muted)}.caught-up-badge{color:var(--primary);background:#d8f3dc;border-radius:20px;padding:4px 10px;font-size:.78rem}.card-type-badge{letter-spacing:.06em;text-transform:uppercase;border-radius:20px;padding:3px 10px;font-size:.72rem;font-weight:700}.badge-due{color:#7f1d1d;background:#ffe5e5}.badge-new{color:#1e3a5f;background:#dbeafe}.badge-extra{color:#78350f;background:#fef3c7}.rating-buttons{flex-direction:column;align-items:center;gap:10px;width:100%;display:flex}.rating-label{color:var(--muted);font-size:.82rem}.rating-row{gap:8px;display:flex}.rating-btn{cursor:pointer;background:#fff;border:2px solid;border-radius:50px;padding:10px 22px;font-size:.9rem;font-weight:600;transition:all .15s}.rating-hard{color:#c2410c;border-color:#f97316}.rating-hard:hover{color:#fff;background:#f97316}.rating-good{border-color:var(--primary);color:var(--primary)}.rating-good:hover{background:var(--primary);color:#fff}.rating-easy{color:#7c3aed;border-color:#7c3aed}.rating-easy:hover{color:#fff;background:#7c3aed}.app-footer{text-align:center;color:var(--muted);border-top:1px solid var(--border);padding:16px 0;font-size:.75rem}