:root{--ink:#17201d;--muted:#6e7772;--paper:#f4f1e8;--card:#fffdf8;--green:#18392f;--green2:#2e6756;--mint:#d9ebe2;--gold:#f2c96d;--coral:#e86f51;--line:#dcdcd2;--shadow:0 18px 50px rgba(27,46,39,.09);--sidebar-width:242px;font-family:Inter,"Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:var(--paper);color-scheme:light}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;background:radial-gradient(circle at 86% 0,#e1eee8 0,transparent 27rem),var(--paper)}button,input,textarea,select{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(232,111,81,.35);outline-offset:2px}
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.word-comparison{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0}.word-comparison span{padding:5px 8px;border-radius:8px;font:700 .8rem Georgia,serif}.word-comparison .hit{background:#d9eee1;color:#245b3e}.word-comparison .miss{background:#f8ddd6;color:#9b402e;text-decoration:underline dotted}.feedback-metrics{display:flex;gap:8px;flex-wrap:wrap;margin:9px 0}.feedback-metrics span{padding:6px 8px;border:1px solid var(--line);border-radius:9px;color:var(--muted);font-size:.72rem}.feedback-metrics b{color:var(--ink)}.missing-words{color:#9b402e!important;font-weight:700}
.feedback-actions{display:flex;justify-content:flex-end;margin-top:10px}.feedback-actions button{padding:9px 12px}.feedback-actions button:disabled{opacity:.72}
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.segmented{display:inline-grid;grid-template-columns:repeat(3,1fr);padding:4px;background:#e7e6de;border-radius:14px;margin-bottom:16px}.segmented button{border:0;background:transparent;padding:9px 16px;border-radius:10px;color:var(--muted)}.segmented .active{background:var(--card);color:var(--green);box-shadow:0 2px 8px #0000000c}.library-list{display:grid;gap:10px}.library-item{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px;display:grid;grid-template-columns:1fr auto;gap:14px}.library-item h3{font:700 1.05rem Georgia,serif;margin:0 0 4px}.library-item p{margin:3px 0;color:var(--muted);font-size:.83rem}.library-actions{display:flex;align-items:center;gap:6px}.library-actions button{border:0;background:#edf2ee;color:var(--green);padding:8px 10px;border-radius:9px}.library-actions .delete{color:#a64938;background:#fff0ec}.empty{padding:36px;text-align:center;color:var(--muted);border:1px dashed #bfc5bd;border-radius:18px}.empty strong{display:block;color:var(--ink);margin-bottom:6px}
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.course-card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:20px;position:relative;overflow:hidden}.course-icon{width:50px;height:50px;display:grid;place-items:center;border-radius:15px;font:bold 1.3rem Georgia}.course-card h2{margin:18px 0 4px}.course-card p{color:var(--muted);font-size:.82rem;margin-bottom:18px}.course-card button{border:0;background:transparent;color:var(--green2);padding:0;font-weight:800}.course-card .meter{height:4px;background:#ecece6;margin-top:18px;border-radius:9px;overflow:hidden}.course-card .meter span{display:block;height:100%;background:var(--green2)}.mint{background:#dceee5}.sand{background:#f5e4bd}.blue{background:#dce7f4}.violet{background:#e8e0f2}.coral{background:#f8dcd4}.sky{background:#d9edf0}.olive{background:#e5e8ce}.source-lab{margin-top:24px}.source-lab>p{color:var(--muted);line-height:1.6}.source-form{display:grid;grid-template-columns:1fr 1.3fr;gap:10px}.source-form input,.source-form textarea,.settings-card select{border:1px solid var(--line);border-radius:12px;padding:12px;background:white}.source-form textarea,.source-form button{grid-column:1/-1}.source-queue{display:grid;gap:8px;margin-top:14px}.source-item{padding:12px;background:#f1f3ee;border-radius:12px;display:flex;justify-content:space-between;gap:15px}.source-item strong,.source-item small{display:block}.source-item small{color:var(--muted);margin-top:4px}.source-item button{border:0;background:transparent;color:#a64938}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px}.stats-grid article{background:var(--green);color:white;padding:20px;border-radius:18px}.stats-grid strong{display:block;color:var(--gold);font-size:2rem}.stats-grid span{font-size:.78rem}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.settings-card{box-shadow:none}.settings-card h2{margin-bottom:20px}.settings-card label{display:grid;gap:7px;margin:15px 0;color:var(--muted);font-size:.83rem}.settings-card input[type=range]{width:100%;accent-color:var(--green)}.switch-row{display:flex!important;justify-content:space-between;align-items:center}.button-stack{display:grid;gap:9px}.file-button{text-align:center;cursor:pointer}.file-button input{display:none}.danger-link{border:0;background:transparent;color:#a64938;padding:10px}.integration-card{position:relative}.coming{position:absolute;right:20px;top:20px;padding:5px 8px;border-radius:8px;background:#fff0cc;color:#765f28;font-size:.7rem}.integration-card p{color:var(--muted);line-height:1.6}.integration-card code{display:block;background:#edf1ed;padding:12px;border-radius:10px;color:var(--green2)}
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.bottom-nav{position:fixed;left:50%;bottom:12px;transform:translateX(-50%);width:min(720px,calc(100% - 22px));height:72px;padding:8px;display:grid;grid-template-columns:repeat(5,1fr);gap:2px;background:rgba(24,57,47,.96);border-radius:22px;box-shadow:0 18px 45px rgba(16,37,30,.28);z-index:30;backdrop-filter:blur(14px)}.bottom-nav button{border:0;background:transparent;color:#a9beb6;border-radius:15px;font-size:.68rem}.bottom-nav button span{display:block;font-size:1.22rem;margin-bottom:3px}.bottom-nav button.active{background:#2b5548;color:#fff}.bottom-nav button.active span{color:var(--gold)}
dialog{width:min(480px,calc(100% - 28px));border:0;border-radius:22px;padding:28px;background:var(--card);color:var(--ink);box-shadow:0 30px 100px #15271f55}dialog::backdrop{background:rgba(18,32,27,.62);backdrop-filter:blur(4px)}.dialog-close{position:absolute;right:14px;top:14px;border:0;background:#eef1ed;width:34px;height:34px;border-radius:50%;font-size:1.25rem}.dialog-actions{display:flex;gap:8px;margin-top:20px}.dialog-actions>*{flex:1}.ipa{color:var(--green2);font-family:Georgia,serif}dialog label{display:grid;gap:6px;margin:14px 0;color:var(--muted)}dialog select{padding:11px;border:1px solid var(--line);border-radius:10px}.full{width:100%}.generated-card{margin-top:10px;padding:11px 13px;background:#edf2ee;border-radius:12px}.generated-card p{margin:4px 0}.generated-card small{color:var(--muted)}.generated-start{margin-top:14px}.generated-course-tile{border-style:dashed}.generated-course-tile .course-icon{background:var(--green);color:var(--gold)}#toast{position:fixed;left:50%;bottom:98px;transform:translate(-50%,20px);background:#17201d;color:white;padding:11px 15px;border-radius:10px;opacity:0;pointer-events:none;transition:.25s;z-index:50;font-size:.82rem}#toast.show{opacity:1;transform:translate(-50%,0)}
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@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

@media(max-width:760px){
  body{padding-left:0}.app-sidebar{width:258px;transform:translateX(-105%);box-shadow:18px 0 60px rgba(10,25,20,.3)}.mobile-nav-open .app-sidebar{transform:translateX(0)}.sidebar-collapsed .app-sidebar{width:258px}.sidebar-collapsed .brand-copy,.sidebar-collapsed .side-nav b,.sidebar-collapsed .theme-toggle b,.sidebar-collapsed .sidebar-note,.app-sidebar .brand small{display:block}.sidebar-collapsed .sidebar-collapse{position:static;transform:none}.sidebar-collapsed .sidebar-head{justify-content:space-between}.sidebar-collapsed .side-nav button,.sidebar-collapsed .theme-toggle{justify-content:flex-start;padding:0 14px}.sidebar-collapse{display:none}.sidebar-overlay{display:block;position:fixed;inset:0;border:0;background:rgba(11,24,20,.5);z-index:35;opacity:0;pointer-events:none;transition:opacity .2s}.mobile-nav-open .sidebar-overlay{opacity:1;pointer-events:auto}.app-header{justify-content:space-between}.mobile-header-brand{display:flex}.mobile-header-brand strong{font-family:Georgia,serif}.menu-button{display:grid;place-items:center}
}

[data-theme="dark"]{--ink:#ecf3ef;--muted:#9caaa4;--paper:#0f1815;--card:#18241f;--green:#234e40;--green2:#73b49d;--mint:#244137;--gold:#f0c96e;--coral:#ef856c;--line:#2d3d36;--shadow:0 18px 50px rgba(0,0,0,.25);color-scheme:dark}
[data-theme="dark"] body{background:radial-gradient(circle at 86% 0,#19362d 0,transparent 30rem),var(--paper)}
[data-theme="dark"] .app-sidebar{background:#0b2e25}
[data-theme="dark"] .daily-card,[data-theme="dark"] .stats-grid article{background:#173e32}
[data-theme="dark"] .daily-card .primary{color:#17392f}
[data-theme="dark"] .phrase-actions button,[data-theme="dark"] .library-actions button,[data-theme="dark"] .icon-button,[data-theme="dark"] .example-speak{background:#24352e;color:#a8d2c2}
[data-theme="dark"] .review-preview,[data-theme="dark"] .feedback,[data-theme="dark"] .source-item,[data-theme="dark"] .integration-card code,[data-theme="dark"] .bubble.customer,[data-theme="dark"] .generated-card{background:#202f29;border-color:var(--line)}
[data-theme="dark"] .segmented{background:#101b17}
[data-theme="dark"] .segmented .active,[data-theme="dark"] .choice-list button,[data-theme="dark"] .review-actions button,[data-theme="dark"] .source-form input,[data-theme="dark"] .source-form textarea,[data-theme="dark"] .settings-card select,[data-theme="dark"] dialog select{background:#1e2c26;color:var(--ink);border-color:var(--line)}
[data-theme="dark"] .course-icon{color:#14211d}
[data-theme="dark"] .task-list button{background:#17251f}[data-theme="dark"] .task-list button.done,[data-theme="dark"] .task-list button.current{background:#244137}[data-theme="dark"] .task-icon{background:#2a3c34;color:#a8d2c2}[data-theme="dark"] .word-comparison .hit{background:#244837;color:#9ed9bd}[data-theme="dark"] .word-comparison .miss{background:#4a2d28;color:#ffad9a}
[data-theme="dark"] dialog{background:var(--card);color:var(--ink)}