:root{color-scheme:dark;--bg: #0f0f10;--fg: #f2f2f0;--muted: #9a9a96;--accent: #1d9e75;--accent-live: #d85a30;--card: #1a1a1c}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;background:var(--bg);color:var(--fg)}.app{max-width:520px;margin:0 auto;padding:48px 24px;text-align:center}h1{font-weight:600;font-size:28px;margin:0 0 4px}.hint{color:var(--muted);margin:0 0 40px;font-size:15px}.mic{width:240px;height:240px;border-radius:50%;border:none;font-size:18px;font-weight:500;color:#fff;background:var(--accent);cursor:pointer;transition:transform .1s ease,background .2s ease;padding:16px}.mic:active{transform:scale(.97)}.mic:disabled{cursor:default;opacity:.85}.mic--listening{background:var(--accent-live);animation:pulse 1.4s ease-in-out infinite}.mic--thinking{background:#444}.mic--speaking{background:#185fa5}@keyframes pulse{0%,to{box-shadow:0 0 #d85a3073}50%{box-shadow:0 0 0 22px #d85a3000}}.lines{margin-top:40px;text-align:left}.line{background:var(--card);border-radius:12px;padding:14px 16px;margin:10px 0;font-size:18px;line-height:1.6}.who{display:inline-block;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-right:10px}.who--tutor{color:var(--accent)}.error{color:#e24b4a;font-size:15px;margin-top:16px}.tabs{display:flex;gap:8px;justify-content:center;margin-bottom:24px}.tab-btn{flex:1;max-width:160px;padding:10px 0;border:1px solid #333;border-radius:8px;background:transparent;color:var(--muted);font-size:15px;font-weight:500;cursor:pointer;transition:background .15s,color .15s}.tab-btn--active{background:var(--accent);color:#fff;border-color:var(--accent)}.lessons-list{text-align:left}.lesson-section{margin-bottom:24px}.section-header{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 8px;padding-bottom:6px;border-bottom:1px solid #2a2a2c}.lesson-row{display:flex;align-items:baseline;gap:10px;width:100%;background:transparent;border:none;border-radius:8px;padding:10px 8px;color:var(--fg);cursor:pointer;text-align:left;font-size:15px;transition:background .1s}.lesson-row:active{background:var(--card)}.lesson-row-num{font-size:12px;color:var(--muted);min-width:28px;flex-shrink:0}.lesson-row-title{flex:1}.lesson-detail{text-align:left}.back-btn{background:transparent;border:none;color:var(--accent);font-size:15px;padding:0;cursor:pointer;margin-bottom:16px}.lesson-title{font-size:20px;font-weight:600;margin:0 0 4px}.lesson-num{color:var(--muted);font-size:13px;margin:0 0 20px}.lesson-explanation{font-size:15px;line-height:1.7;white-space:pre-wrap;margin:0 0 24px}.examples-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}.examples-table{width:100%;border-collapse:collapse;font-size:14px}.examples-table th{text-align:left;color:var(--muted);font-weight:500;font-size:12px;text-transform:uppercase;letter-spacing:.04em;padding:8px 10px;border-bottom:1px solid #2a2a2c}.examples-table td{padding:10px;border-bottom:1px solid #1e1e20;vertical-align:top;line-height:1.5}.ex-jp{font-size:16px;white-space:nowrap}.ex-note{color:var(--muted);font-size:13px}.practise-btn{display:block;width:100%;padding:12px;margin-bottom:24px;background:var(--accent);color:#fff;border:none;border-radius:10px;font-size:16px;font-weight:500;cursor:pointer}.lesson-banner{display:flex;align-items:center;justify-content:space-between;background:var(--card);border-radius:8px;padding:10px 14px;margin-bottom:20px;font-size:14px;color:var(--accent)}.lesson-banner-clear{background:transparent;border:none;color:var(--muted);font-size:13px;cursor:pointer;padding:0}.app-header{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:4px}.user-bar{display:flex;align-items:center;gap:10px}.user-email{font-size:12px;color:var(--muted)}.logout-btn{background:transparent;border:1px solid #333;border-radius:6px;color:var(--muted);font-size:12px;padding:3px 10px;cursor:pointer}.logout-btn:hover{color:var(--fg);border-color:#555}.auth-screen{max-width:360px;margin:0 auto;padding:80px 24px;text-align:center}.auth-form{display:flex;flex-direction:column;gap:12px;margin-top:40px}.auth-form input{padding:12px 14px;background:var(--card);border:1px solid #333;border-radius:8px;color:var(--fg);font-size:15px}.auth-form input:focus{outline:none;border-color:var(--accent)}.auth-error{color:#e24b4a;font-size:14px;margin:0}.auth-buttons{display:flex;gap:10px}.auth-buttons button{flex:1;padding:12px;border:none;border-radius:8px;background:var(--accent);color:#fff;font-size:15px;font-weight:500;cursor:pointer}.auth-signup{background:transparent!important;border:1px solid #444!important;color:var(--muted)!important}.cards-view{text-align:left}.card-form{display:flex;flex-direction:column;gap:8px;margin-bottom:24px}.card-input{padding:10px 12px;background:var(--card);border:1px solid #333;border-radius:8px;color:var(--fg);font-size:15px}.card-input:focus{outline:none;border-color:var(--accent)}.card-add-btn{padding:10px;background:var(--accent);color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:500;cursor:pointer}.card-add-btn:disabled{opacity:.5;cursor:default}.card-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}.card-group{list-style:none;display:flex;flex-direction:column}.card-item{display:flex;align-items:center;justify-content:space-between;background:var(--card);border-radius:10px;padding:16px 14px;gap:12px;cursor:pointer;-webkit-user-select:none;user-select:none;min-height:64px;transition:background .15s}.card-item:active{background:#222224}.card-item--flipped{background:#1c2a25;border:1px solid var(--accent)}.card-item-text{display:flex;flex-direction:column;gap:4px;flex:1;min-width:0}.card-jp{font-size:22px}.card-reading{font-size:13px;color:var(--muted)}.card-en{font-size:15px}.card-example-jp{font-size:13px;color:var(--muted);margin-top:4px}.card-example-en{font-size:13px;color:var(--muted);font-style:italic}.card-delete-btn{background:transparent;border:none;color:var(--muted);font-size:20px;line-height:1;cursor:pointer;padding:0 4px;flex-shrink:0}.card-delete-btn:hover{color:#e24b4a}.card-actions{display:flex;flex-direction:column;align-items:center;gap:6px;flex-shrink:0}.card-speak-btn{background:transparent;border:none;font-size:16px;cursor:pointer;padding:0 4px;opacity:.5;line-height:1}.card-speak-btn:hover{opacity:1}.card-speak-inline{background:transparent;border:none;font-size:12px;cursor:pointer;padding:0 4px;opacity:.4;vertical-align:middle}.card-speak-inline:hover{opacity:1}.gen-label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}.gen-textarea{resize:vertical;font-family:inherit;line-height:1.5}.gen-btn{padding:10px 16px;background:#2a5a8a;color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:500;cursor:pointer}.gen-btn:disabled{opacity:.5;cursor:default}.preview-panel{background:var(--card);border:1px solid var(--accent);border-radius:10px;padding:16px;margin-bottom:16px;display:flex;flex-direction:column;gap:10px}.preview-label{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--accent);margin:0}.preview-field{display:flex;flex-direction:column;gap:3px}.preview-field-label{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.preview-actions{display:flex;gap:8px;margin-top:4px}.preview-discard-btn{flex:1;padding:10px;background:transparent;border:1px solid #444;border-radius:8px;color:var(--muted);font-size:15px;cursor:pointer}.card-form-divider{text-align:center;font-size:12px;color:var(--muted);margin:16px 0 12px;position:relative}.card-form-divider:before,.card-form-divider:after{content:"";position:absolute;top:50%;width:35%;height:1px;background:#2a2a2c}.card-form-divider:before{left:0}.card-form-divider:after{right:0}.kana-view{text-align:left}.kana-script-toggle{display:flex;gap:8px;margin-bottom:16px}.kana-script-toggle .tab-btn{flex:1}.kana-group-picker{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px}.kana-group-btn{padding:5px 12px;border:1px solid #333;border-radius:6px;background:transparent;color:var(--muted);font-size:13px;cursor:pointer;transition:background .12s,color .12s}.kana-group-btn--active{background:var(--accent);color:#fff;border-color:var(--accent)}.kana-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(78px,1fr));gap:8px}.kana-card{flex-direction:column;justify-content:center;align-items:center;min-height:88px;padding:10px 6px;gap:4px}.kana-card .card-item-text{flex:none;text-align:center}.kana-char{font-size:28px;display:block;text-align:center}.kana-romaji{font-size:16px;display:block;text-align:center}.kana-card .card-speak-btn{font-size:13px}.card-breakdown-btn{background:transparent;border:none;font-size:14px;cursor:pointer;padding:0 4px;opacity:.45;line-height:1;color:var(--fg)}.card-breakdown-btn:hover{opacity:1}.card-breakdown-btn--active{opacity:1;color:var(--accent)}.breakdown-panel{background:#0d0d0f;border:1px solid #2a2a2c;border-top:1px solid #1a1a1c;border-radius:0 0 10px 10px;padding:16px}.kanji-entry{padding:14px 0;border-bottom:1px solid #1e1e20}.kanji-entry:first-child{padding-top:0}.kanji-entry:last-child{border-bottom:none;padding-bottom:0}.kanji-entry-header{display:flex;align-items:flex-start;gap:14px;margin-bottom:10px}.kanji-entry-char{font-size:42px;line-height:1;flex-shrink:0}.kanji-entry-info{display:flex;flex-direction:column;gap:3px;padding-top:6px}.kanji-entry-meanings{font-size:14px;font-weight:500}.kanji-entry-readings{font-size:13px;color:var(--muted)}.kanji-entry-components{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}.kanji-comp{display:flex;align-items:center;gap:5px;background:#1a1a1c;border-radius:6px;padding:4px 9px}.kanji-comp-char{font-size:16px}.kanji-comp-kw{font-size:12px;color:var(--muted)}.kanji-mnemonic-wrap{display:flex;flex-direction:column;gap:8px}.kanji-mnemonic-ta{resize:vertical;font-family:inherit;font-size:14px;line-height:1.5;min-height:72px}.kanji-save-btn{align-self:flex-end;padding:7px 18px;background:var(--accent);color:#fff;border:none;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer}.kanji-save-btn:disabled{opacity:.5;cursor:default}.review-idle{text-align:center;padding-top:40px}.review-counts{display:flex;justify-content:center;align-items:center;gap:28px;margin-bottom:36px}.review-count-item{display:flex;flex-direction:column;align-items:center;gap:6px}.review-count-num{font-size:52px;font-weight:700;line-height:1;color:var(--accent)}.review-count-label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.07em}.review-count-sep{font-size:28px;color:var(--muted);padding-bottom:20px}.review-start-btn{width:100%;padding:16px;background:var(--accent);color:#fff;border:none;border-radius:12px;font-size:18px;font-weight:600;cursor:pointer;transition:opacity .15s}.review-start-btn:hover{opacity:.88}.review-session{display:flex;flex-direction:column;gap:16px}.review-progress{display:flex;align-items:center;justify-content:space-between}.review-progress-frac{font-size:14px;color:var(--muted)}.review-new-badge{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;background:var(--accent);color:#fff;padding:3px 9px;border-radius:10px}.review-card{min-height:160px;cursor:pointer;justify-content:center;align-items:center}.review-card-jp{font-size:52px;text-align:center;display:block}.review-hint{text-align:center;color:var(--muted);font-size:14px;margin:0}.review-grade-btns{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.review-grade-btn{padding:14px 0;border:none;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;transition:opacity .1s}.review-grade-btn:disabled{opacity:.45;cursor:default}.review-grade-btn:not(:disabled):active{opacity:.75}.grade-again{background:#3d1515;color:#ff9090}.grade-hard{background:#3a2e0a;color:#ffd080}.grade-good{background:#133325;color:#6ed4a4}.grade-easy{background:#102440;color:#80c4ff}.review-done{text-align:center;padding-top:56px}.review-done-check{font-size:60px;color:var(--accent);margin-bottom:12px;line-height:1}.review-done-title{font-size:22px;font-weight:600;margin:0 0 8px}