:root{--bg: #0f1115;--surface: #171a21;--surface-2: #1e222b;--border: #2a2f3a;--text: #e6e8ec;--muted: #9aa3b2;--primary: #4f8cff;--green: #2ecc71;--yellow: #f1c40f;--orange: #e67e22;--red: #e74c3c;--radius: 12px}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,system-ui,Arial,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;overflow-x:hidden}.app{max-width:760px;margin:0 auto;padding:24px 16px 64px}header.top{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap;margin-bottom:18px}header.top h1{font-size:20px;margin:0;letter-spacing:-.3px}.tts-badge{font-size:12px;padding:4px 10px;border-radius:999px;border:1px solid var(--border);color:var(--muted);white-space:nowrap;flex-shrink:0}.tts-badge.on{color:var(--green);border-color:#1f4d36;background:#11271c}.tts-badge.off{color:var(--orange);border-color:#4d3a1f;background:#271f11}nav.tabs{display:flex;gap:6px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:6px;margin-bottom:20px}nav.tabs button{flex:1;min-width:0;background:transparent;border:none;color:var(--muted);padding:10px 6px;border-radius:8px;cursor:pointer;font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}nav.tabs button.active{background:var(--surface-2);color:var(--text)}.card-face{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:40px 28px;min-height:180px;display:flex;flex-direction:column;gap:16px;justify-content:center;align-items:center;text-align:center}.card-face .front{font-size:26px;font-weight:600}.card-face .divider{width:60%;height:1px;background:var(--border)}.card-face .back{font-size:24px;color:var(--primary);font-weight:600}.card-face .notes{font-size:14px;color:var(--muted);max-width:90%}.card-face .empty{color:var(--muted);font-size:16px}.controls{display:flex;gap:8px;justify-content:center;margin-top:18px;flex-wrap:wrap}button.btn{border:none;border-radius:8px;padding:12px 18px;font-size:15px;font-weight:600;cursor:pointer;color:#fff;background:var(--surface-2);transition:opacity .15s,transform .05s}button.btn:hover{opacity:.9}button.btn:active{transform:translateY(1px)}button.btn:disabled{opacity:.45;cursor:not-allowed}button.btn.primary{background:var(--primary)}button.btn.ghost{background:transparent;border:1px solid var(--border);color:var(--text)}button.btn.icon{padding:12px 14px}.grade-row{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:18px}.grade{display:flex;flex-direction:column;align-items:center;gap:4px;padding:12px 6px;border-radius:8px;border:none;color:#fff;cursor:pointer;font-weight:700}.grade small{font-weight:500;opacity:.85;font-size:11px}.grade.again{background:var(--red)}.grade.hard{background:var(--orange)}.grade.good{background:var(--green)}.grade.easy{background:var(--primary)}.grade:active{transform:translateY(1px)}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.row.between{justify-content:space-between}.stat-pill{font-size:13px;color:var(--muted)}.stat-pill b{color:var(--text)}input,textarea,select{width:100%;background:var(--surface-2);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:11px 12px;font-size:14px;font-family:inherit}textarea{resize:vertical;min-height:64px}label{display:block;font-size:13px;color:var(--muted);margin:14px 0 6px}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;margin-bottom:16px}.panel h3{margin:0 0 4px;font-size:16px}.panel .sub{color:var(--muted);font-size:13px;margin:0 0 12px}.list{display:flex;flex-direction:column;gap:8px}.item{display:flex;align-items:center;justify-content:space-between;gap:10px;background:var(--surface-2);border:1px solid var(--border);border-radius:8px;padding:10px 12px}.item .texts{overflow:hidden}.item .q{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.item .a{color:var(--muted);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.item .actions{display:flex;gap:6px;flex-shrink:0}.item .actions button{background:transparent;border:1px solid var(--border);color:var(--text);border-radius:6px;padding:6px 9px;cursor:pointer;font-size:13px}.item .actions button.danger{color:var(--red);border-color:#4d2222}.deck-chip{display:inline-flex;align-items:center;gap:8px;background:var(--surface-2);border:1px solid var(--border);border-radius:999px;padding:7px 14px;cursor:pointer;font-size:14px;color:var(--text)}.deck-chip.active{border-color:var(--primary);color:var(--primary)}.deck-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.stat-box{background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:16px}.stat-box .num{font-size:28px;font-weight:700}.stat-box .lbl{color:var(--muted);font-size:13px}.kbd-hint{text-align:center;color:var(--muted);font-size:12px;margin-top:14px}kbd{background:var(--surface-2);border:1px solid var(--border);border-bottom-width:2px;border-radius:5px;padding:1px 6px;font-family:ui-monospace,monospace;font-size:11px;color:var(--text)}.voice-select{width:auto;padding:5px 8px;font-size:12px;border-radius:999px}.voice-select:disabled{opacity:.55;cursor:not-allowed}.voice-chip{background:var(--surface-2);border:1px solid var(--border);color:var(--text);border-radius:999px;padding:6px 12px;font-size:12px;cursor:pointer;white-space:nowrap}.voice-chip:hover{border-color:var(--primary)}span.voice-chip{cursor:default;opacity:.8}.voice-pop{position:relative}.voice-pop-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:20}.voice-pop-panel{position:absolute;right:0;top:calc(100% + 8px);z-index:21;width:320px;max-width:84vw;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:12px;box-shadow:0 14px 40px #0000008c}.voice-pop-panel .voice-picker{margin-top:0}.voice-picker{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:6px}.voice-option{display:flex;align-items:center;gap:10px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:10px 12px;cursor:pointer;transition:border-color .15s,background .15s}.voice-option:hover{border-color:#3a4150}.voice-option.selected{border-color:var(--primary);background:#16203a}.vo-play{flex-shrink:0;width:34px;height:34px;border-radius:50%;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;font-size:13px;display:flex;align-items:center;justify-content:center}.vo-play:hover{border-color:var(--primary);color:var(--primary)}.vo-play:disabled{opacity:.5;cursor:wait}.vo-info{display:flex;flex-direction:column;overflow:hidden}.vo-name{font-weight:600;font-size:14px}.vo-hint{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.vo-check{margin-left:auto;color:var(--primary);font-weight:700}@media(max-width:480px){.voice-picker{grid-template-columns:1fr}}@media(max-width:560px){.app{padding:18px 12px 56px}nav.tabs{gap:3px;padding:4px}nav.tabs button{padding:9px 4px;font-size:13px}.card-face{padding:32px 18px}.card-face .front{font-size:22px}.card-face .back{font-size:21px}.grade-row{gap:5px}.grade{padding:11px 3px;font-size:14px}.grade small{font-size:10px}}.chat{display:flex;flex-direction:column;gap:12px}.chat-log{display:flex;flex-direction:column;gap:10px;max-height:60vh;overflow-y:auto;padding:4px}.bubble{max-width:88%;padding:12px 14px;border-radius:14px;font-size:15px;line-height:1.5;white-space:pre-wrap;word-break:break-word}.bubble.user{align-self:flex-end;background:var(--primary);color:#fff;border-bottom-right-radius:4px}.bubble.assistant{align-self:flex-start;background:var(--surface);border:1px solid var(--border);border-bottom-left-radius:4px}.bubble.typing{color:var(--muted);font-style:italic}.bubble-row{display:flex;gap:8px;align-items:flex-start}.msg-text{flex:1}.speak{flex-shrink:0;background:transparent;border:1px solid var(--border);border-radius:8px;padding:4px 8px;cursor:pointer;font-size:13px}.speak:hover{border-color:var(--primary)}.chat-card{margin-top:10px;background:var(--surface-2);border:1px solid var(--border);border-left:3px solid var(--green);border-radius:10px;padding:10px 12px;display:flex;gap:10px;align-items:center;justify-content:space-between}.cc-texts{overflow:hidden}.cc-front{font-size:13px;color:var(--muted)}.cc-back{font-size:15px;font-weight:600;color:var(--green)}.cc-actions{display:flex;gap:6px;flex-shrink:0;align-items:center}.cc-add{padding:8px 12px;font-size:13px}.chat-input{display:flex;gap:8px;align-items:flex-end}.chat-input textarea{flex:1;min-height:44px}.chat-actions{display:flex;flex-direction:column;gap:6px}.hint{color:var(--muted);font-size:13px;line-height:1.5}.error{color:var(--red);font-size:13px;margin-top:8px}.range-val{color:var(--text);font-weight:600}.spacer{flex:1}.grow{flex:1;min-width:140px}