@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=IBM+Plex+Mono:wght@400;500&display=swap";/**
* Copyright (c) 2014 The xterm.js authors. All rights reserved.
* Copyright (c) 2012-2013, Christopher Jeffrey (MIT License)
* https://github.com/chjj/term.js
* @license MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* Originally forked from (with the author's permission):
*   Fabrice Bellard's javascript vt100 for jslinux:
*   http://bellard.org/jslinux/
*   Copyright (c) 2011 Fabrice Bellard
*   The original design remains. The terminal itself
*   has been extended to include xterm CSI codes, among
*   other features.
*/.xterm{cursor:text;position:relative;user-select:none;-ms-user-select:none;-webkit-user-select:none}.xterm.focus,.xterm:focus{outline:none}.xterm .xterm-helpers{position:absolute;top:0;z-index:5}.xterm .xterm-helper-textarea{padding:0;border:0;margin:0;position:absolute;opacity:0;left:-9999em;top:0;width:0;height:0;z-index:-5;white-space:nowrap;overflow:hidden;resize:none}.xterm .composition-view{background:#000;color:#fff;display:none;position:absolute;white-space:nowrap;z-index:1}.xterm .composition-view.active{display:block}.xterm .xterm-viewport{background-color:#000;overflow-y:scroll;cursor:default;position:absolute;right:0;left:0;top:0;bottom:0}.xterm .xterm-screen{position:relative}.xterm .xterm-screen canvas{position:absolute;left:0;top:0}.xterm-char-measure-element{display:inline-block;visibility:hidden;position:absolute;top:0;left:-9999em;line-height:normal}.xterm.enable-mouse-events{cursor:default}.xterm.xterm-cursor-pointer,.xterm .xterm-cursor-pointer{cursor:pointer}.xterm.column-select.focus{cursor:crosshair}.xterm .xterm-accessibility:not(.debug),.xterm .xterm-message{position:absolute;left:0;top:0;bottom:0;right:0;z-index:10;color:transparent;pointer-events:none}.xterm .xterm-accessibility-tree:not(.debug) *::selection{color:transparent}.xterm .xterm-accessibility-tree{font-family:monospace;-webkit-user-select:text;user-select:text;white-space:pre}.xterm .xterm-accessibility-tree>div{transform-origin:left;width:fit-content}.xterm .live-region{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}.xterm-dim{opacity:1!important}.xterm-underline-1{text-decoration:underline}.xterm-underline-2{text-decoration:double underline}.xterm-underline-3{text-decoration:wavy underline}.xterm-underline-4{text-decoration:dotted underline}.xterm-underline-5{text-decoration:dashed underline}.xterm-overline{text-decoration:overline}.xterm-overline.xterm-underline-1{text-decoration:overline underline}.xterm-overline.xterm-underline-2{text-decoration:overline double underline}.xterm-overline.xterm-underline-3{text-decoration:overline wavy underline}.xterm-overline.xterm-underline-4{text-decoration:overline dotted underline}.xterm-overline.xterm-underline-5{text-decoration:overline dashed underline}.xterm-strikethrough{text-decoration:line-through}.xterm-screen .xterm-decoration-container .xterm-decoration{z-index:6;position:absolute}.xterm-screen .xterm-decoration-container .xterm-decoration.xterm-decoration-top-layer{z-index:7}.xterm-decoration-overview-ruler{z-index:8;position:absolute;top:0;right:0;pointer-events:none}.xterm-decoration-top{z-index:2;position:relative}.xterm .xterm-scrollable-element>.scrollbar{cursor:default}.xterm .xterm-scrollable-element>.scrollbar>.scra{cursor:pointer;font-size:11px!important}.xterm .xterm-scrollable-element>.visible{opacity:1;background:#0000;transition:opacity .1s linear;z-index:11}.xterm .xterm-scrollable-element>.invisible{opacity:0;pointer-events:none}.xterm .xterm-scrollable-element>.invisible.fade{transition:opacity .8s linear}.xterm .xterm-scrollable-element>.shadow{position:absolute;display:none}.xterm .xterm-scrollable-element>.shadow.top{display:block;top:0;left:3px;height:3px;width:100%;box-shadow:var(--vscode-scrollbar-shadow, #000) 0 6px 6px -6px inset}.xterm .xterm-scrollable-element>.shadow.left{display:block;top:3px;left:0;height:100%;width:3px;box-shadow:var(--vscode-scrollbar-shadow, #000) 6px 0 6px -6px inset}.xterm .xterm-scrollable-element>.shadow.top-left-corner{display:block;top:0;left:0;height:3px;width:3px}.xterm .xterm-scrollable-element>.shadow.top.left{box-shadow:var(--vscode-scrollbar-shadow, #000) 6px 0 6px -6px inset}.mastery-container{max-width:960px;margin:0 auto;padding:20px 16px}.mastery-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:20px}.mastery-header h2{margin:0;font-size:1.4rem}.mastery-subtitle{color:var(--text-muted);font-size:.8rem;margin-top:2px}.mastery-badge{padding:4px 12px;border-radius:20px;font-size:11px;font-weight:700;background:#60a5fa26;color:#93c5fd}.mastery-empty{text-align:center;padding:60px 20px;color:var(--text-muted)}.mastery-loading{text-align:center;padding:40px;color:var(--text-muted)}.mastery-stats-bar{display:flex;gap:12px;padding:14px 16px;background:#ffffff08;border:1px solid var(--border);border-radius:12px;margin-bottom:20px;flex-wrap:wrap;align-items:center}.stat-item{display:flex;align-items:center;gap:6px;font-size:13px}.stat-item span{font-weight:700;font-size:18px}.stat-item small{color:var(--text-muted);font-size:11px}.stat-due span{color:#f59e0b}.stat-mastered span{color:#10b981}.review-start-btn{margin-left:auto}.mastery-filters{display:flex;flex-direction:column;gap:10px;margin-bottom:20px}.filter-group{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.filter-group label{font-size:12px;font-weight:600;color:var(--text-muted);min-width:40px}.filter-pills{display:flex;gap:4px;flex-wrap:wrap}.pill{padding:5px 12px;border-radius:20px;font-size:12px;font-weight:600;border:1px solid var(--border);background:transparent;color:var(--text-muted);cursor:pointer;transition:all .2s}.pill:hover{background:#ffffff0f}.pill.active{background:var(--accent, #6366f1);color:#fff;border-color:var(--accent, #6366f1)}.topic-grid{display:grid;grid-template-columns:1fr;gap:10px}.topic-card{display:flex;align-items:center;gap:14px;padding:16px;background:#ffffff08;border:1px solid var(--border);border-radius:12px;cursor:pointer;transition:all .2s}.topic-card:hover{border-color:var(--accent);background:#6366f10f;transform:translateY(-1px)}.topic-icon{font-size:28px;min-width:40px;text-align:center}.topic-info h3{margin:0;font-size:14px}.topic-info p{margin:2px 0 6px;font-size:12px;color:var(--text-muted)}.topic-meta{display:flex;gap:8px;font-size:11px}.topic-level{padding:2px 8px;border-radius:10px;font-weight:700;font-size:10px;background:#6366f126;color:#a5b4fc}.topic-level[data-level=A1]{background:#22c55e26;color:#86efac}.topic-level[data-level=A2]{background:#3b82f626;color:#93c5fd}.topic-level[data-level=B1]{background:#a855f726;color:#d8b4fe}.topic-level[data-level=B2]{background:#f59e0b26;color:#fcd34d}.topic-level[data-level=C1]{background:#ef444426;color:#fca5a5}.topic-mode,.topic-count{color:var(--text-muted)}.topic-arrow{color:var(--text-muted);margin-left:auto;flex-shrink:0}.word-grid{display:grid;grid-template-columns:1fr;gap:12px}.word-card{padding:16px;background:#ffffff08;border:1px solid var(--border);border-radius:12px;transition:border-color .2s}.word-card:hover{border-color:var(--accent)}.word-card-top{display:flex;align-items:center;gap:8px}.word-text{font-size:18px;font-weight:700;color:#93c5fd}.word-pos{font-size:11px;color:var(--text-muted);font-style:italic}.word-ipa{font-size:13px;color:#a5b4fc;margin:2px 0 8px}.word-meaning{font-size:14px;font-weight:600;margin-bottom:2px}.word-meaning-en{font-size:12px;color:var(--text-muted);margin-bottom:8px}.word-example{font-size:12px;color:var(--text-dim);font-style:italic}.word-example-vi{font-size:11px;color:var(--text-muted);margin-bottom:6px}.word-synonyms{font-size:11px;color:#a5b4fc}.word-progress-badge{display:inline-block;padding:2px 10px;border-radius:10px;font-size:10px;font-weight:600;margin-top:6px;background:#f59e0b26;color:#fcd34d}.word-progress-badge[data-mastered=true]{background:#22c55e26;color:#86efac}.btn-icon{background:none;border:none;color:var(--text-muted);cursor:pointer;padding:4px;border-radius:6px;transition:all .2s}.btn-icon:hover{color:var(--accent);background:#6366f11a}.btn-sm{font-size:11px;padding:4px 10px}.story-panel{margin-top:20px;padding:16px;background:#6366f10f;border:1px solid rgba(99,102,241,.2);border-radius:12px;animation:fadeIn .3s ease}.story-panel h4{margin:0 0 8px;font-size:13px}.story-panel p{font-size:14px;line-height:1.6;margin:0 0 10px}.mastery-review-card{max-width:500px;margin:30px auto;padding:40px 30px;background:linear-gradient(135deg,#6366f114,#a855f70f);border:1px solid rgba(99,102,241,.2);border-radius:20px;text-align:center;cursor:pointer;transition:transform .2s;min-height:250px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}.mastery-review-card:hover{transform:scale(1.01)}.review-word{font-size:32px;font-weight:800;color:#93c5fd}.review-ipa{font-size:16px;color:#a5b4fc}.review-hint{color:var(--text-muted);font-size:13px;margin-top:20px}.review-answer{margin-top:16px}.review-meaning{font-size:20px;font-weight:700;color:#fbbf24}.review-meaning-en{font-size:14px;color:var(--text-muted);margin-top:4px}.review-example{font-size:13px;color:var(--text-dim);font-style:italic;margin-top:10px}.review-grades{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;max-width:500px;margin:20px auto}.grade-btn{display:flex;align-items:center;justify-content:center;gap:6px;padding:14px 8px;border:2px solid var(--border);border-radius:12px;font-size:13px;font-weight:700;cursor:pointer;transition:all .2s;background:transparent;color:var(--text-primary)}.grade-btn:hover{transform:translateY(-2px)}.grade-again{border-color:#ef4444;color:#ef4444}.grade-again:hover{background:#ef44441a}.grade-hard{border-color:#f59e0b;color:#f59e0b}.grade-hard:hover{background:#f59e0b1a}.grade-good{border-color:#10b981;color:#10b981}.grade-good:hover{background:#10b9811a}.grade-easy{border-color:#6366f1;color:#6366f1}.grade-easy:hover{background:#6366f11a}.lesson-grid{display:grid;grid-template-columns:1fr;gap:10px}.lesson-card{display:flex;align-items:center;gap:14px;padding:16px;background:#ffffff08;border:1px solid var(--border);border-radius:12px;cursor:pointer;transition:all .2s}.lesson-card:hover{border-color:var(--accent);background:#6366f10f}.lesson-level{padding:6px 10px;border-radius:10px;font-weight:800;font-size:12px;min-width:36px;text-align:center}.lesson-level[data-level=A1]{background:#22c55e26;color:#86efac}.lesson-level[data-level=A2]{background:#3b82f626;color:#93c5fd}.lesson-level[data-level=B1]{background:#a855f726;color:#d8b4fe}.lesson-level[data-level=B2]{background:#f59e0b26;color:#fcd34d}.lesson-level[data-level=C1]{background:#ef444426;color:#fca5a5}.lesson-info h3{margin:0;font-size:14px}.lesson-info p{margin:2px 0 4px;font-size:12px;color:var(--text-muted)}.lesson-cat{font-size:11px;color:#a5b4fc}.grammar-theory{padding:20px;background:#ffffff08;border:1px solid var(--border);border-radius:12px;margin:16px 0;line-height:1.7;font-size:14px}.grammar-theory h3{color:#93c5fd;margin:16px 0 8px}.grammar-theory h4{color:#a5b4fc;margin:12px 0 6px}.grammar-theory strong{color:#fbbf24}.grammar-theory li{margin-left:20px}.grammar-examples{margin:16px 0}.grammar-examples h4{margin-bottom:10px}.grammar-example-item{padding:10px 14px;background:#6366f10f;border-radius:10px;margin-bottom:8px}.example-en{font-size:14px;font-weight:600}.example-vi{font-size:12px;color:var(--text-muted);margin-top:2px}.grammar-actions{display:flex;gap:10px;margin:20px 0}.quiz-list{display:flex;flex-direction:column;gap:16px}.quiz-item{padding:16px;background:#ffffff08;border:1px solid var(--border);border-radius:12px;transition:border-color .3s}.quiz-item.correct{border-color:#10b98166}.quiz-item.wrong{border-color:#ef444466}.quiz-number{font-size:11px;font-weight:700;color:var(--text-muted);margin-bottom:6px}.quiz-question{font-size:14px;font-weight:600;margin-bottom:12px;line-height:1.5}.quiz-options{display:grid;grid-template-columns:1fr;gap:8px}.quiz-option{padding:10px 14px;border:1px solid var(--border);border-radius:10px;font-size:13px;cursor:pointer;background:transparent;color:var(--text-primary);text-align:left;transition:all .2s}.quiz-option:hover:not(:disabled){border-color:var(--accent);background:#6366f10f}.quiz-option.selected-correct{border-color:#10b981;background:#10b9811a;color:#10b981}.quiz-option.selected-wrong{border-color:#ef4444;background:#ef44441a;color:#ef4444}.quiz-option.correct-answer{border-color:#10b981}.quiz-input-wrap{display:flex;gap:8px}.quiz-input{flex:1;padding:10px 14px;border:1px solid var(--border);border-radius:10px;font-size:13px;background:transparent;color:var(--text-primary)}.quiz-result{display:flex;align-items:flex-start;gap:8px;margin-top:10px;padding:10px;border-radius:8px;font-size:13px;animation:fadeIn .3s ease}.quiz-result.correct{background:#10b9811a;color:#10b981}.quiz-result.wrong{background:#ef44441a;color:#ef4444}.quiz-explain{margin-top:4px;font-size:12px;color:var(--text-muted)}.journal-list{display:flex;flex-direction:column;gap:10px}.journal-item{padding:14px;background:#ffffff08;border:1px solid var(--border);border-radius:12px}.journal-topic{font-size:11px;font-weight:700;color:#a5b4fc;text-transform:uppercase;margin-bottom:6px}.journal-error{font-size:13px;color:#fca5a5;margin-bottom:4px}.journal-correction{font-size:13px;color:#86efac;margin-bottom:4px}.journal-explain{font-size:12px;color:var(--text-muted);margin-bottom:4px}.journal-date{font-size:10px;color:var(--text-dim)}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media (min-width: 640px){.topic-grid,.word-grid,.lesson-grid,.quiz-options{grid-template-columns:repeat(2,1fr)}}@media (min-width: 960px){.mastery-container{padding:24px}.word-grid{grid-template-columns:repeat(3,1fr)}}@media (max-width: 480px){.mastery-header{flex-direction:column;align-items:flex-start}.mastery-stats-bar{flex-direction:column}.review-grades{grid-template-columns:repeat(2,1fr)}.review-word{font-size:26px}.grade-btn{padding:10px 6px;font-size:12px}}.topic-level[data-level=C2],.lesson-level[data-level=C2]{background:#dc262633;color:#fca5a5}.text-context-menu{background:#1e293b;border:1px solid rgba(255,255,255,.12);border-radius:12px;box-shadow:0 8px 32px #00000080;min-width:220px;max-width:320px;overflow:hidden;animation:fadeIn .15s ease}.tcm-header{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border-bottom:1px solid rgba(255,255,255,.08)}.tcm-selected{font-size:12px;color:#93c5fd;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:240px}.tcm-close{background:none;border:none;color:#64748b;cursor:pointer;padding:2px}.tcm-close:hover{color:#e2e8f0}.tcm-actions{display:flex;gap:4px;padding:8px}.tcm-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:8px;border-radius:8px;border:1px solid rgba(255,255,255,.08);background:#ffffff0a;color:#e2e8f0;cursor:pointer;font-size:12px;font-weight:600;transition:all .15s}.tcm-btn:hover{background:#6366f126;border-color:#6366f14d}.tcm-btn:disabled{opacity:.5;cursor:not-allowed}.tcm-ipa{padding:8px 12px 12px;border-top:1px solid rgba(255,255,255,.06)}.tcm-ipa-result{font-size:14px;color:#a5b4fc;font-weight:600;line-height:1.6}.nav-more-dropdown{position:relative;z-index:9999}.nav-more-dropdown:hover .nav-more-menu{display:block!important}.nav-more-menu{z-index:9999!important}.nav-more-menu a:hover{background:#6366f11f!important;color:#a5b4fc!important}:root{color-scheme:dark;--bg: #0c0f1a;--bg-strong: #131729;--surface: rgba(22, 28, 50, .75);--surface-strong: rgba(30, 38, 68, .85);--surface-hover: rgba(38, 48, 82, .9);--text: #e8eaf0;--text-muted: #8890a8;--text-dim: #5a6180;--border: rgba(100, 120, 180, .15);--border-active: rgba(100, 160, 255, .3);--accent: #3b82f6;--accent-strong: #2563eb;--accent-glow: rgba(59, 130, 246, .2);--accent-soft: rgba(59, 130, 246, .1);--success: #10b981;--success-soft: rgba(16, 185, 129, .12);--warning: #f59e0b;--warning-soft: rgba(245, 158, 11, .12);--danger: #ef4444;--danger-soft: rgba(239, 68, 68, .12);--shadow: 0 8px 32px rgba(0, 0, 0, .4);--shadow-lg: 0 20px 60px rgba(0, 0, 0, .5);--glow: 0 0 20px rgba(59, 130, 246, .15);--blur: blur(16px);--radius: 16px;--radius-sm: 10px;--radius-full: 999px;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;font-size:15px;line-height:1.6}*{box-sizing:border-box;margin:0;padding:0}::selection{background:var(--accent);color:#fff}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-dim)}body{min-width:320px;min-height:100vh;color:var(--text);background:var(--bg);background-image:radial-gradient(ellipse at 15% 5%,rgba(59,130,246,.08),transparent 50%),radial-gradient(ellipse at 85% 10%,rgba(139,92,246,.06),transparent 45%),radial-gradient(ellipse at 50% 90%,rgba(16,185,129,.04),transparent 40%);background-attachment:fixed}a{color:var(--accent);text-decoration:none;transition:color .2s}a:hover{color:var(--accent-strong)}#root{min-height:100vh}.app-shell{width:min(1360px,calc(100% - 32px));margin:0 auto;padding:20px 0 60px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:16px 24px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);backdrop-filter:var(--blur);-webkit-backdrop-filter:var(--blur);box-shadow:var(--shadow);position:sticky;top:8px;z-index:100;overflow:visible;transition:box-shadow .3s,border-color .3s}.topbar:hover{border-color:var(--border-active);box-shadow:var(--shadow-lg)}.eyebrow{font-family:IBM Plex Mono,monospace;text-transform:uppercase;letter-spacing:.16em;font-size:11px;color:var(--accent);font-weight:500}.brand-link{display:inline-block;margin-top:4px;font-size:24px;font-weight:900;text-decoration:none;color:var(--text);letter-spacing:-.02em;transition:color .2s}.brand-link:hover{color:var(--accent)}.topnav{display:flex;flex-wrap:nowrap;gap:2px;align-items:center}.topnav a{text-decoration:none;color:var(--text-muted);font-weight:600;font-size:12px;padding:5px 8px;border-radius:var(--radius-full);transition:all .2s;white-space:nowrap}.topnav a:hover{color:var(--text);background:var(--accent-soft)}.topbar-row{display:flex;align-items:center;justify-content:space-between;width:100%}.topbar-admin{display:flex;align-items:center;gap:4px}.topbar-admin a{text-decoration:none;color:#f59e0b;font-weight:600;font-size:11px;padding:4px 8px;border-radius:var(--radius-full);transition:all .2s;white-space:nowrap}.topbar-admin a:hover{color:#fbbf24;background:#f59e0b1a}.topbar-lang-learning{display:flex;align-items:center;gap:8px;padding:6px 12px;background:#6366f10f;border:1px solid rgba(99,102,241,.15);border-radius:8px;font-size:12px;color:var(--text-muted);width:100%}.content-shell{margin-top:24px}.page-header{display:flex;justify-content:space-between;align-items:flex-start;gap:18px;margin-bottom:24px}.page-title{margin:0;font-size:clamp(28px,4vw,44px);font-weight:900;line-height:1.05;letter-spacing:-.03em;background:linear-gradient(135deg,var(--text) 0%,var(--accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);backdrop-filter:var(--blur);-webkit-backdrop-filter:var(--blur);box-shadow:var(--shadow);transition:transform .2s,border-color .3s,box-shadow .3s}.card:hover{border-color:var(--border-active);box-shadow:var(--shadow-lg)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:0 18px;border:1px solid var(--border);border-radius:var(--radius-full);background:var(--surface-strong);color:var(--text);font:inherit;font-size:13px;font-weight:700;cursor:pointer;transition:all .2s ease;white-space:nowrap}.btn:hover{transform:translateY(-1px);border-color:var(--border-active);background:var(--surface-hover);box-shadow:var(--glow)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}.btn-primary{border-color:transparent;background:linear-gradient(135deg,var(--accent) 0%,var(--accent-strong) 100%);color:#fff;box-shadow:0 4px 16px #3b82f64d}.btn-primary:hover{background:linear-gradient(135deg,var(--accent-strong) 0%,#1d4ed8 100%);box-shadow:0 6px 24px #3b82f666}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}.stat-card{padding:20px}.stat-label{color:var(--text-muted);font-size:11px;text-transform:uppercase;letter-spacing:.1em;font-weight:600}.stat-value{margin-top:8px;font-size:32px;font-weight:900;letter-spacing:-.02em;background:linear-gradient(135deg,var(--text) 0%,var(--accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.auth-shell{width:min(960px,calc(100% - 32px));margin:0 auto;min-height:100vh;display:flex;align-items:center;padding:28px 0}.auth-panel{width:100%;padding:36px}.field{display:grid;gap:8px}.form-grid{display:grid;gap:14px}.two-columns{grid-template-columns:repeat(2,minmax(0,1fr))}input,select,textarea{width:100%;min-height:44px;padding:12px 16px;border-radius:var(--radius-sm);border:1px solid var(--border);background:#0f142899;color:var(--text);font:inherit;font-size:14px;transition:border-color .2s,box-shadow .2s}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}textarea{min-height:96px;resize:vertical}select option,select optgroup{background-color:#0f1428;color:var(--text)}select option:checked,select option:hover{background-color:#1b2547;color:var(--text)}@media (max-width: 860px){.it-lab-grid{grid-template-columns:1fr!important}}@media (max-width: 520px){.it-bagua-grid{gap:6px!important}.it-bagua-grid>.card{padding:8px 6px!important}.it-bagua-grid h3{font-size:12px!important;line-height:1.2!important}}.coaching-layout{display:grid;grid-template-columns:320px 1fr;gap:20px;height:calc(100vh - 140px);min-height:500px}.coaching-sidebar{display:flex;flex-direction:column;gap:16px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);padding:20px;overflow-y:auto}.coaching-avatar-wrap{width:100%;height:260px;min-height:260px;border-radius:16px;background:linear-gradient(145deg,#0f172acc,#1e293b99);border:1px solid rgba(59,130,246,.15);box-shadow:0 0 20px #3b82f614}.coaching-sidebar-header{display:flex;justify-content:space-between;align-items:center}.coaching-sidebar-header h3{font-size:14px;font-weight:700}.coaching-link{font-size:12px;color:var(--accent)}.coaching-score-ring{display:flex;flex-direction:column;align-items:center;gap:4px;padding:12px 0}.score-svg{width:100px;height:100px}.score-text-svg{font-size:24px;font-weight:900;fill:var(--text);font-family:Inter,sans-serif}.score-label{font-size:12px;color:var(--text-muted);font-weight:600;text-transform:uppercase;letter-spacing:.06em}.llm-badge{display:inline-flex;align-items:center;gap:4px;padding:4px 12px;border-radius:var(--radius-full);background:var(--accent-soft);color:var(--accent);font-size:11px;font-weight:700;letter-spacing:.04em;align-self:center}.coaching-components{display:flex;flex-direction:column;gap:8px}.coaching-component-bar{display:flex;align-items:center;gap:8px}.comp-label{font-size:11px;color:var(--text-muted);width:80px;flex-shrink:0}.comp-bar-track{flex:1;height:6px;background:#ffffff0f;border-radius:3px;overflow:hidden}.comp-bar-fill{height:100%;border-radius:3px;transition:width .8s ease}.comp-score{font-size:11px;font-weight:700;color:var(--text);width:24px;text-align:right}.coaching-quick-actions h4{font-size:12px;color:var(--text-muted);margin-bottom:8px}.quick-action-grid{display:flex;flex-direction:column;gap:6px}.quick-action-btn{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-strong);color:var(--text-muted);font:inherit;font-size:12px;text-align:left;cursor:pointer;transition:all .2s}.quick-action-btn:hover{color:var(--text);border-color:var(--accent);background:var(--accent-soft)}.quick-action-btn:disabled{opacity:.4;cursor:not-allowed}.coaching-main{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);overflow:hidden}.coaching-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding:16px 24px;border-bottom:1px solid var(--border);background:var(--surface-strong)}.coaching-header>div:first-child{min-width:0}.coaching-header h2{font-size:18px;font-weight:800}.coaching-subtitle{font-size:11px;color:var(--text-dim);margin-top:2px;font-family:IBM Plex Mono,monospace;word-break:break-word}.coaching-header-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.coaching-header-actions>div{flex-wrap:wrap}.coaching-messages{flex:1;overflow-y:auto;padding:20px 24px;display:flex;flex-direction:column;gap:16px}.coaching-msg{display:flex;gap:12px;max-width:85%;animation:msgFadeIn .3s ease}@keyframes msgFadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.coaching-msg-user{align-self:flex-end;flex-direction:row-reverse}.coaching-msg-assistant{align-self:flex-start}.coaching-msg-avatar{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;background:var(--bg-strong);border:1px solid var(--border)}.coaching-msg-content{border-radius:var(--radius);padding:12px 16px;border:1px solid var(--border)}.coaching-msg-user .coaching-msg-content{background:var(--accent-soft);border-color:#3b82f633}.coaching-msg-assistant .coaching-msg-content{background:var(--surface-strong)}.coaching-msg-role{font-size:11px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px}.coaching-msg-text p{margin-bottom:6px;font-size:14px;line-height:1.65}.coaching-msg-text p:last-child{margin-bottom:0}.coaching-cursor{display:inline-block;animation:blink .8s step-end infinite;color:var(--accent)}@keyframes blink{50%{opacity:0}}.coaching-typing{display:flex;gap:6px;padding:4px 0}.coaching-typing span{width:8px;height:8px;border-radius:50%;background:var(--text-dim);animation:typingBounce 1.4s infinite ease-in-out}.coaching-typing span:nth-child(2){animation-delay:.2s}.coaching-typing span:nth-child(3){animation-delay:.4s}@keyframes typingBounce{0%,80%,to{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}.coaching-input-area{display:flex;gap:12px;padding:16px 24px;border-top:1px solid var(--border);background:var(--bg-strong)}.coaching-textarea{flex:1;min-height:48px;max-height:120px;resize:none;border-radius:var(--radius-sm)}.coaching-send-btn{min-width:100px}.coaching-mic-btn:hover{background:#ffffff1a!important}.coaching-mic-active{box-shadow:0 0 0 4px #ef444426}@keyframes micPulse{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.08);opacity:.85}}@keyframes fadeIn{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.coaching-empty{text-align:center;padding:80px 20px}.coaching-empty-icon{font-size:64px;margin-bottom:16px}.coaching-empty h2{font-size:28px;font-weight:800;margin-bottom:8px}.coaching-empty p{color:var(--text-muted);margin-bottom:24px}.coaching-welcome{text-align:center;padding:40px 20px;max-width:480px;margin:auto}.coaching-welcome-icon{font-size:48px;margin-bottom:12px}.coaching-welcome h3{font-size:20px;font-weight:800;margin-bottom:8px}.coaching-welcome p{color:var(--text-muted);font-size:14px;line-height:1.7;margin-bottom:8px}.coaching-welcome-hint{color:var(--accent)!important;font-weight:600}.coaching-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px;gap:12px}.coaching-loading-dots{display:flex;gap:6px}.coaching-loading-dots span{width:10px;height:10px;border-radius:50%;background:var(--accent);animation:typingBounce 1.4s infinite ease-in-out}.coaching-loading-dots span:nth-child(2){animation-delay:.15s}.coaching-loading-dots span:nth-child(3){animation-delay:.3s}.coaching-loading p{color:var(--text-muted);font-size:13px}.coaching-context-empty{padding:16px;color:var(--text-dim);font-size:13px}.coaching-context-cards{display:flex;flex-direction:column;gap:12px}.coaching-avatar-wrap{width:100%;height:200px;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--border);background:radial-gradient(ellipse at center,rgba(59,130,246,.06),var(--bg-strong));position:relative}.coaching-avatar-wrap canvas{border-radius:var(--radius-sm)}.avatar-container{width:100%;height:100%}@media (max-width: 1024px){.coaching-layout{grid-template-columns:1fr;height:auto}.coaching-sidebar{flex-direction:row;flex-wrap:wrap;max-height:200px;overflow-y:auto}.quick-action-grid{flex-direction:row;flex-wrap:wrap}.quick-action-btn{width:auto}.coaching-messages{min-height:400px}}.mobile-menu-toggle{display:none;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--border);border-radius:10px;background:var(--surface-strong, rgba(255,255,255,.04));color:var(--text);cursor:pointer;padding:0;transition:background .2s,border-color .2s;flex-shrink:0}.mobile-menu-toggle:hover{background:var(--surface-hover, rgba(255,255,255,.08));border-color:var(--border-active)}.mobile-menu-toggle:active{transform:scale(.95)}@media (max-width: 1024px){.topbar,.page-header{flex-direction:column;align-items:stretch}.topnav{justify-content:flex-start}.mobile-menu-toggle{display:inline-flex;flex-shrink:0}.topbar .topbar-row-1{display:flex;flex-direction:row!important;align-items:center;justify-content:space-between;gap:8px;width:100%;flex-wrap:wrap}.topbar .topbar-brand{flex:1 1 0;min-width:0;overflow:hidden}.topbar .topbar-brand .brand-link{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar .eyebrow,.topbar .topnav,.topbar .topbar-row-2{display:none}.topbar.is-mobile-menu-open .topnav{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));align-items:stretch;flex-basis:100%;gap:4px;margin-top:6px;padding-top:8px;border-top:1px solid rgba(255,255,255,.06)}.topbar.is-mobile-menu-open .topnav>a,.topbar.is-mobile-menu-open .topnav>div>span{padding:10px 12px;font-size:13px;border-radius:10px;background:#ffffff08;border:1px solid rgba(255,255,255,.05);text-align:center;justify-content:center;display:flex;align-items:center}.topbar.is-mobile-menu-open .topnav>a:hover,.topbar.is-mobile-menu-open .topnav>div>span:hover{background:#6366f11f;border-color:#6366f14d}.topbar.is-mobile-menu-open .topnav>div{display:block;position:relative!important}.topbar.is-mobile-menu-open .topnav>div>span{width:100%}.topbar.is-mobile-menu-open .topbar-row-2{display:flex;flex-direction:column;align-items:stretch;flex-basis:100%;gap:10px;padding-top:10px}.topbar.is-mobile-menu-open .topbar-row-2>div{flex-wrap:wrap;justify-content:flex-start}}@media (max-width: 520px){.topbar.is-mobile-menu-open .topnav{grid-template-columns:repeat(2,1fr)}}@media (max-width: 640px){.interp-sep{display:none}.interp-lang-row .interp-lang-select{flex-basis:calc(100% - 60px)}}.piano-flank-row{overflow-x:auto;-webkit-overflow-scrolling:touch}.piano-scroll{flex-shrink:0}@media (max-width: 900px){.piano-flank-row{flex-wrap:wrap;overflow-x:visible;gap:8px;row-gap:10px}.piano-flank-row .piano-scroll{order:-1;flex:0 0 100%;max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}.piano-flank-row .piano-flank-btn{flex:0 0 auto}}@media (max-height: 500px) and (orientation: landscape){.music-practice-page .practice-sheet-wrap{zoom:.44;text-align:center}.music-practice-page .practice-sheet-wrap>svg,.music-practice-page .practice-sheet-wrap>div{margin-left:auto;margin-right:auto}.music-practice-page .piano-flank-row{justify-content:center!important;overflow-x:visible!important;text-align:center}.music-practice-page .piano-flank-row .piano-scroll{margin-left:auto;margin-right:auto}.music-practice-page .piano-flank-row{zoom:.46}}@media (max-height: 500px) and (orientation: landscape) and (min-width: 600px){.music-practice-page .piano-flank-row{zoom:.56}}@media (max-height: 500px) and (orientation: landscape) and (min-width: 700px){.music-practice-page .piano-flank-row{zoom:.65}}@media (max-height: 500px) and (orientation: landscape) and (min-width: 800px){.music-practice-page .piano-flank-row{zoom:.72}}@media (max-height: 500px) and (orientation: landscape) and (min-width: 900px){.music-practice-page .piano-flank-row{zoom:.78}}@media (max-height: 500px) and (orientation: landscape){.music-practice-page{padding:4px 12px!important}.music-practice-page>h1{font-size:16px!important;margin:2px 0!important}.music-practice-page>p{font-size:10px!important;margin:0 0 4px!important}.music-practice-page>a[href*="/music"]:first-of-type{display:none}}@media (max-width: 480px){.music-practice-page .practice-sheet-wrap,.music-practice-page .piano-flank-row{zoom:.82}}@media (min-width: 1025px){.mobile-menu-toggle{display:none!important}}@media (max-width: 640px){.app-shell{width:min(100% - 16px,1360px);padding-top:12px}.auth-shell{width:min(100% - 16px,960px)}.topbar,.card{border-radius:12px}.two-columns,.coaching-layout{grid-template-columns:1fr}.coaching-sidebar{display:none}}.pr-page{max-width:1100px;margin:0 auto;padding:0 16px}.pr-header{text-align:center;margin-bottom:32px}.pr-header h1{font-size:28px;font-weight:800;margin:0 0 6px;background:linear-gradient(135deg,#a5b4fc,#3b82f6);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.pr-header p{color:var(--text-muted);font-size:14px;margin:0}.pr-stepper{display:flex;align-items:center;justify-content:center;gap:0;margin-bottom:36px}.pr-step{display:flex;align-items:center;gap:10px;cursor:pointer;padding:10px 18px;border-radius:12px;transition:all .25s;background:transparent;border:none;color:var(--text-dim);font-weight:600;font-size:13px}.pr-step:hover{color:var(--text-muted)}.pr-step.active{color:var(--accent)}.pr-step.done{color:var(--success)}.pr-step-num{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px;border:2px solid var(--border);background:var(--bg-strong);transition:all .3s}.pr-step.active .pr-step-num{border-color:var(--accent);background:#3b82f626;color:var(--accent);box-shadow:0 0 12px #3b82f64d}.pr-step.done .pr-step-num{border-color:var(--success);background:#10b98126;color:var(--success)}.pr-step-line{width:60px;height:2px;background:var(--border);border-radius:2px}.pr-step-line.active{background:linear-gradient(90deg,var(--accent),var(--border))}.pr-step-line.done{background:var(--success)}.pr-plan-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;padding:12px 16px;border-radius:14px;background:var(--surface);border:1px solid var(--border)}.pr-plan-pills{display:flex;gap:6px}.pr-plan-pill{padding:6px 16px;border-radius:20px;font-size:12px;font-weight:700;border:1px solid var(--border);background:transparent;color:var(--text-muted);cursor:pointer;transition:all .2s}.pr-plan-pill.active{background:#3b82f626;border-color:var(--accent);color:var(--accent)}.pr-filters{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:20px}.pr-filter-chip{padding:6px 14px;border-radius:20px;font-size:11px;font-weight:600;border:1px solid var(--border);background:transparent;color:var(--text-muted);cursor:pointer;transition:all .2s}.pr-filter-chip:hover{border-color:var(--text-dim);color:var(--text)}.pr-filter-chip.active{background:#3b82f61f;border-color:var(--accent);color:var(--accent)}.pr-filter-select{padding:6px 12px;border-radius:10px;font-size:11px;font-weight:600;background:var(--bg-strong);color:var(--text);border:1px solid var(--border);cursor:pointer}.pr-prompts{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px}.pr-prompt-card{padding:20px;border-radius:16px;background:var(--surface);border:1px solid var(--border);transition:all .25s;cursor:pointer;position:relative;overflow:hidden}.pr-prompt-card:hover{border-color:var(--border-active);transform:translateY(-2px);box-shadow:var(--shadow)}.pr-prompt-card.selected{border-color:var(--accent);box-shadow:0 0 20px #3b82f626}.pr-prompt-card.locked{opacity:.6;cursor:not-allowed}.pr-prompt-card .pr-fw-badge{display:inline-block;padding:3px 10px;border-radius:6px;font-size:10px;font-weight:800;letter-spacing:.5px;text-transform:uppercase}.pr-fw-badge.prep{background:#3b82f626;color:#60a5fa}.pr-fw-badge.star{background:#a855f726;color:#c084fc}.pr-prompt-card h4{margin:10px 0 6px;font-size:15px;font-weight:700}.pr-prompt-card .pr-prompt-text{font-size:13px;color:var(--text-muted);line-height:1.6;margin:0 0 12px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.pr-prompt-chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}.pr-prompt-chips span{font-size:10px;padding:3px 8px;border-radius:6px;background:#ffffff0d;color:var(--text-muted)}.pr-prompt-card .pr-rec-badge{position:absolute;top:12px;right:12px;font-size:10px;padding:3px 8px;border-radius:6px;background:#10b98126;color:var(--success);font-weight:700}.pr-prompt-card .pr-lock-badge{position:absolute;top:12px;right:12px;font-size:10px;padding:3px 8px;border-radius:6px;background:#ef44441f;color:var(--danger);font-weight:700}.pr-select-btn{width:100%;padding:10px;border-radius:10px;font-size:13px;font-weight:700;border:none;cursor:pointer;transition:all .2s;background:#3b82f61f;color:var(--accent)}.pr-select-btn:hover{background:#3b82f640}.pr-select-btn:disabled{opacity:.5;cursor:not-allowed}.pr-session-panel{max-width:680px;margin:0 auto}.pr-topic-card{padding:20px;border-radius:16px;border:1px solid var(--accent);background:#3b82f60f;margin-bottom:20px;text-align:center}.pr-topic-card .pr-topic-label{font-size:11px;color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:1px;margin-bottom:6px}.pr-topic-card h3{margin:0 0 8px;font-size:18px}.pr-topic-card p{color:var(--text-muted);font-size:13px;line-height:1.6;margin:0}.pr-consent{display:flex;gap:10px;align-items:flex-start;padding:14px;border-radius:12px;background:var(--surface);border:1px solid var(--border);margin-bottom:20px;font-size:13px;color:var(--text-muted);line-height:1.6}.pr-consent input[type=checkbox]{margin-top:3px;accent-color:var(--accent)}.pr-mode-tabs{display:flex;gap:4px;padding:4px;border-radius:12px;background:var(--bg-strong);margin-bottom:20px}.pr-mode-tab{flex:1;padding:10px;border-radius:10px;font-size:12px;font-weight:700;border:none;cursor:pointer;transition:all .2s;background:transparent;color:var(--text-muted);text-align:center}.pr-mode-tab.active{background:#3b82f626;color:var(--accent)}.pr-mode-tab:hover:not(.active){color:var(--text)}.pr-mic-area{display:flex;flex-direction:column;align-items:center;gap:16px;padding:40px 20px}.pr-mic-btn{width:96px;height:96px;border-radius:50%;border:3px solid var(--border);background:var(--surface);color:var(--text-muted);font-size:36px;cursor:pointer;transition:all .3s;display:flex;align-items:center;justify-content:center}.pr-mic-btn:hover{border-color:var(--accent);color:var(--accent);box-shadow:0 0 24px #3b82f633}.pr-mic-btn.recording{border-color:var(--danger);color:var(--danger);animation:micPulse 1.2s ease infinite;box-shadow:0 0 30px #ef44444d}.pr-mic-btn:disabled{opacity:.4;cursor:not-allowed}.pr-mic-timer{font-size:24px;font-weight:800;font-family:IBM Plex Mono,monospace;color:var(--danger)}.pr-mic-hint{font-size:13px;color:var(--text-muted)}.pr-dropzone{padding:40px 20px;border-radius:16px;border:2px dashed var(--border);background:var(--bg-strong);text-align:center;cursor:pointer;transition:all .2s}.pr-dropzone:hover,.pr-dropzone.drag-active{border-color:var(--accent);background:#3b82f60a}.pr-dropzone h4{margin:0 0 6px;color:var(--text);font-size:14px}.pr-dropzone p{margin:0;font-size:12px;color:var(--text-muted)}.pr-audio-preview{padding:14px;border-radius:12px;background:var(--surface);border:1px solid var(--border);margin-top:16px}.pr-audio-preview audio{width:100%;margin-top:8px}.pr-mock-panel{text-align:center;padding:40px 20px;border-radius:16px;border:1px solid var(--border);background:var(--surface)}.pr-mock-panel .pr-mock-icon{font-size:48px;margin-bottom:12px}.pr-cta{margin-top:20px}.pr-cta-btn{width:100%;padding:14px 24px;border-radius:12px;font-size:15px;font-weight:700;border:none;cursor:pointer;background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;transition:all .25s;box-shadow:0 4px 16px #3b82f64d}.pr-cta-btn:hover{transform:translateY(-1px);box-shadow:0 6px 24px #3b82f666}.pr-cta-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.pr-nav-row{display:flex;gap:10px;margin-top:16px}.pr-nav-row .btn{flex:1;text-align:center;text-decoration:none}@media (max-width: 768px){.pr-prompts{grid-template-columns:1fr}.pr-stepper{gap:0}.pr-step-line{width:30px}.pr-step{padding:8px 10px;font-size:11px}}