*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#f7f5f0;
  --surface:#ffffff;
  --surface2:#f0ede6;
  --border:rgba(0,0,0,0.08);
  --border2:rgba(0,0,0,0.14);
  --text:#1c1917;
  --text2:#57534e;
  --text3:#a8a29e;
  --red:#c8403a;
  --red-light:rgba(200,64,58,0.08);
  --red-border:rgba(200,64,58,0.25);
  --green:#2d7a50;
  --green-light:rgba(45,122,80,0.08);
  --green-border:rgba(45,122,80,0.25);
  --gold:#b8860b;
  --blue:#3c64c8;
  --shadow-sm:0 1px 3px rgba(0,0,0,0.06),0 1px 2px rgba(0,0,0,0.04);
  --shadow:0 4px 16px rgba(0,0,0,0.08),0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:0 12px 40px rgba(0,0,0,0.12),0 4px 8px rgba(0,0,0,0.06);
  --radius:6px;
  --radius-lg:10px;
}
body{background:var(--bg);color:var(--text);font-family:'DM Sans',sans-serif;min-height:100vh;line-height:1.6}
button{cursor:pointer;transition:all 0.15s;font-family:'DM Sans',sans-serif}
button:disabled{opacity:0.45;cursor:not-allowed}
input{font-family:'DM Sans',sans-serif}
input:focus{outline:none}
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:var(--surface2)}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:2px}

/* ── LAYOUT ── */
.app{display:flex;flex-direction:column;min-height:100vh}
.topbar{background:#123524;padding:0 24px;height:52px;display:flex;align-items:center;gap:16px;position:sticky;top:0;z-index:100;box-shadow:0 2px 8px rgba(18,53,36,0.3)}
.topbar-logo{font-family:'Fraunces',serif;font-size:16px;font-weight:600;color:#fff;letter-spacing:0.3px;text-decoration:none}
.topbar-sep{width:1px;height:18px;background:rgba(255,255,255,0.25)}
.topbar-course{font-size:12px;font-weight:500;color:rgba(255,255,255,0.8);letter-spacing:0.5px}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.back-btn{background:rgba(255,255,255,0.15);border:1px solid rgba(255,255,255,0.25);color:#fff;font-size:11px;font-weight:600;letter-spacing:1px;padding:5px 14px;border-radius:20px;text-transform:uppercase}
.back-btn:hover{background:rgba(255,255,255,0.25)}

/* ── MODULE MAP ── */
.map-container{max-width:860px;margin:0 auto;padding:40px 20px 80px;width:100%}
.map-hero{margin-bottom:48px}
.map-hero h1{font-family:'Fraunces',serif;font-size:clamp(36px,5vw,56px);font-weight:300;font-style:italic;color:var(--text);line-height:1.1;margin-bottom:10px}
.map-hero p{font-size:15px;color:var(--text2);max-width:520px;line-height:1.65}
.module-block{margin-bottom:32px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm)}
.module-header{padding:18px 22px;display:flex;align-items:center;gap:14px;border-bottom:1px solid var(--border);cursor:pointer;user-select:none}
.module-header:hover{background:var(--surface2)}
.module-badge{width:44px;height:44px;border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.module-badge-inner{font-family:'Fraunces',serif;font-size:13px;font-weight:600;color:#fff}
.module-info{flex:1}
.module-title{font-family:'Fraunces',serif;font-size:17px;font-weight:600;color:var(--text);margin-bottom:2px}
.module-sub{font-size:12px;color:var(--text3);letter-spacing:0.5px;text-transform:uppercase;font-weight:500}
.module-cefr{font-family:'DM Mono',monospace;font-size:11px;padding:3px 9px;border-radius:12px;border:1px solid;font-weight:500;flex-shrink:0}
.module-chevron{color:var(--text3);font-size:14px;transition:transform 0.2s;flex-shrink:0}
.module-chevron.open{transform:rotate(180deg)}
.unit-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1px;background:var(--border)}
.unit-card{background:var(--surface);padding:16px 18px;cursor:pointer;transition:background 0.15s;position:relative;overflow:hidden}
.unit-card:hover:not(.locked){background:#faf8f5}
.unit-card.locked{cursor:default;opacity:0.55}
.unit-card.available{border-color:var(--gold);background:#fffdf6}
.unit-card.complete::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--green)}
.section-card.assessment-card{border-color:rgba(60,100,200,0.3);background:rgba(60,100,200,0.02)}
.unit-card.in-progress::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--gold)}
.unit-week{font-family:'DM Mono',monospace;font-size:9px;font-weight:500;letter-spacing:1.5px;color:var(--text3);text-transform:uppercase;margin-bottom:5px}
.unit-title{font-family:'Fraunces',serif;font-size:14px;font-weight:600;color:var(--text);margin-bottom:3px;line-height:1.3}
.unit-theme{font-size:11px;color:var(--text3);line-height:1.4}
.unit-status{display:flex;align-items:center;gap:4px;margin-top:8px}
.unit-status-dot{width:6px;height:6px;border-radius:50%}
.unit-status-label{font-size:10px;font-weight:500;letter-spacing:0.5px;text-transform:uppercase}
.lock-icon{position:absolute;top:14px;right:14px;font-size:13px;opacity:0.4}
.progress-ring{position:absolute;top:12px;right:12px}

/* ── UNIT VIEW ── */
.unit-container{max-width:760px;margin:0 auto;padding:32px 20px 80px;width:100%}
.unit-header{margin-bottom:32px}
.unit-header-meta{display:flex;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.unit-header-module{font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--text3)}
.unit-header-sep{color:var(--text3);font-size:11px}
.unit-header-cefr{font-family:'DM Mono',monospace;font-size:10px;padding:2px 8px;border-radius:8px;border:1px solid var(--border2);color:var(--text2)}
.unit-title-big{font-family:'Fraunces',serif;font-size:clamp(28px,4vw,40px);font-weight:400;font-style:italic;color:var(--text);margin-bottom:6px;line-height:1.1}
.unit-theme-big{font-size:14px;color:var(--text2);margin-bottom:20px}
.unit-progress-bar{height:4px;background:var(--surface2);border-radius:2px;overflow:hidden;margin-bottom:8px}
.unit-progress-fill{height:100%;background:var(--red);border-radius:2px;transition:width 0.5s ease}
.unit-progress-label{font-size:11px;color:var(--text3);text-align:right}

/* ── SECTION TABS ── */
.section-tabs{display:flex;gap:4px;flex-wrap:wrap;margin-bottom:28px;padding-bottom:16px;border-bottom:1px solid var(--border)}
.section-tab{font-size:11px;font-weight:500;padding:6px 14px;border-radius:20px;border:1px solid var(--border);background:transparent;color:var(--text2);letter-spacing:0.3px;white-space:nowrap}
.section-tab:hover{background:var(--surface2)}
.section-tab.active{background:var(--red);border-color:var(--red);color:#fff}
.section-tab.complete{border-color:var(--green-border);color:var(--green)}
.section-tab.complete.active{background:var(--green);border-color:var(--green);color:#fff}

/* ── SECTION CARD ── */
.section-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);margin-bottom:16px}
.section-header{padding:18px 22px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:12px}
.section-type-badge{font-family:'DM Mono',monospace;font-size:9px;font-weight:500;letter-spacing:1.5px;padding:3px 9px;border-radius:10px;background:var(--surface2);color:var(--text3);text-transform:uppercase;flex-shrink:0}
.section-title{font-family:'Fraunces',serif;font-size:16px;font-weight:600;color:var(--text);flex:1}
.section-score-badge{font-size:11px;font-weight:600;padding:3px 10px;border-radius:12px;flex-shrink:0}
.section-body{padding:22px}
.section-instruction{font-size:13px;color:var(--text2);margin-bottom:18px;font-style:italic;line-height:1.5}

/* ── VOCAB INTRO ── */
.vocab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:8px}
.vocab-card{padding:12px 14px;background:var(--surface2);border-radius:var(--radius);border:1px solid var(--border)}
.vocab-da{font-family:'Fraunces',serif;font-size:17px;font-weight:600;color:var(--text);margin-bottom:2px}
.vocab-en{font-size:12px;color:var(--text2);margin-bottom:6px}
.vocab-example{font-size:11px;color:var(--text3);font-style:italic;line-height:1.4;border-top:1px solid var(--border);padding-top:6px;margin-top:4px}

/* ── MATCHING ── */
.matching-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px 16px}
.match-col-header{font-size:9px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--text3);padding-bottom:6px;border-bottom:1px solid var(--border);text-align:center}
.match-tile{padding:10px 14px;border:1.5px solid var(--border);border-radius:var(--radius);background:var(--surface);text-align:center;user-select:none;min-height:44px;display:flex;align-items:center;justify-content:center;font-size:14px;transition:all 0.15s}
.match-tile.selectable:hover{border-color:var(--red);background:var(--red-light);cursor:pointer}
.match-tile.selected{border-color:var(--red);background:var(--red-light);color:var(--red);font-weight:600}
.match-tile.wrong{border-color:var(--red);background:var(--red-light);animation:shake 0.4s ease}
.match-tile.matched{opacity:0.45;text-decoration:line-through;cursor:default}
.match-tile.da-tile{font-family:'Fraunces',serif;font-size:15px;font-weight:600}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}

/* ── MULTIPLE CHOICE ── */
.mc-question{margin-bottom:22px;padding-bottom:22px;border-bottom:1px solid var(--border)}
.mc-question:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.mc-prompt{font-size:14px;font-weight:500;color:var(--text);margin-bottom:12px;line-height:1.5}
.mc-options{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.mc-option{padding:9px 14px;border:1.5px solid var(--border);border-radius:var(--radius);background:var(--surface);font-size:13px;color:var(--text);text-align:left;transition:all 0.15s}
.mc-option:hover:not(:disabled){border-color:var(--red);background:var(--red-light)}
.mc-option.selected{border-color:var(--red);background:var(--red-light);color:var(--red);font-weight:500}
.mc-option.correct{border-color:var(--green);background:var(--green-light);color:var(--green);font-weight:500}
.mc-option.wrong{border-color:var(--red);background:var(--red-light);color:var(--red);font-weight:500}

/* ── FILL BLANK ── */
.fill-item{display:flex;align-items:baseline;flex-wrap:wrap;gap:6px;margin-bottom:16px;padding:14px 16px;background:var(--surface2);border-radius:var(--radius);font-size:15px;border:1px solid var(--border)}
.fill-item:last-child{margin-bottom:0}
.fill-text{font-family:'Fraunces',serif;font-size:16px;color:var(--text)}
.fill-input{font-family:'Fraunces',serif;font-size:16px;width:120px;padding:2px 8px;border-bottom:2px solid var(--border2);background:transparent;color:var(--text);border-top:none;border-left:none;border-right:none;border-radius:0;text-align:center}
.fill-input:focus{border-bottom-color:var(--red)}
.fill-input.correct{border-bottom-color:var(--green);color:var(--green)}
.fill-input.wrong{border-bottom-color:var(--red);color:var(--red)}
.fill-hint{font-size:10px;color:var(--text3);font-style:italic;margin-left:4px}
.fill-correction{font-size:11px;color:var(--green);margin-left:6px;font-weight:500}

/* ── SENTENCE CONSTRUCTION (DRAG) ── */
.sc-item{margin-bottom:20px;padding:16px;background:var(--surface2);border-radius:var(--radius);border:1px solid var(--border)}
.sc-item:last-child{margin-bottom:0}
.sc-translation{font-size:11px;color:var(--text3);font-style:italic;margin-bottom:12px}
.sc-drop-zone{min-height:48px;border:2px dashed var(--border2);border-radius:var(--radius);padding:8px 10px;display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-bottom:10px;background:var(--surface);transition:border-color 0.15s}
.sc-drop-zone.correct{border-color:var(--green);border-style:solid;background:var(--green-light)}
.sc-drop-zone.wrong{border-color:var(--red);border-style:solid}
.sc-tiles{display:flex;flex-wrap:wrap;gap:6px}
.sc-tile{font-family:'Fraunces',serif;font-size:15px;font-weight:500;padding:5px 12px;background:var(--surface);border:1.5px solid var(--border2);border-radius:20px;cursor:grab;user-select:none;transition:all 0.15s;color:var(--text)}
.sc-tile:hover{border-color:var(--red);background:var(--red-light);color:var(--red)}
.sc-tile.placed{background:var(--red);border-color:var(--red);color:#fff;cursor:pointer}
.sc-tile.placed:hover{background:#a83330}
.sc-tile.punct{opacity:0.7;font-style:italic}

/* ── GRAMMAR TABLE ── */
.grammar-explanation{font-size:13px;color:var(--text2);margin-bottom:18px;line-height:1.6;padding:12px 16px;background:var(--surface2);border-radius:var(--radius);border-left:3px solid var(--red)}
.grammar-table{width:100%;border-collapse:collapse;font-size:14px}
.grammar-table th{font-family:'DM Mono',monospace;font-size:9px;letter-spacing:1.5px;text-transform:uppercase;color:var(--text3);padding:8px 12px;border-bottom:1px solid var(--border);text-align:center;background:var(--surface2)}
.grammar-table th:first-child{text-align:left}
.grammar-table td{padding:6px 8px;border-bottom:1px solid var(--border);text-align:center;vertical-align:middle}
.grammar-table td:first-child{font-size:12px;color:var(--text2);font-style:italic;text-align:left;padding-left:12px;white-space:nowrap}
.grammar-table tr:last-child td{border-bottom:none}
.grammar-input{width:100%;max-width:100px;text-align:center;padding:5px 8px;font-family:'Fraunces',serif;font-size:15px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);color:var(--text)}
.grammar-input:focus{border-color:var(--red);box-shadow:0 0 0 2px var(--red-light)}
.grammar-input.correct{border-color:var(--green);background:var(--green-light);color:var(--green)}
.grammar-input.wrong{border-color:var(--red);background:var(--red-light);color:var(--red)}
.grammar-correction{font-size:11px;color:var(--green);display:block;margin-top:2px}
.grammar-given{background:var(--surface2);color:var(--text2);font-size:13px;font-style:italic;text-align:center;padding:6px 10px}
.grammar-given span{display:block}
.grammar-label{font-size:12px;color:var(--text2);font-style:italic;text-align:left;padding-left:12px;white-space:nowrap}
.grammar-display-note{font-size:11px;color:var(--text3);font-style:italic;margin-top:10px;text-align:center}

/* ── GRAMMAR EXPLANATION CARD ── */
.grammar-exp-card{background:var(--surface2);border-radius:var(--radius);border:1px solid var(--border);border-left:4px solid var(--red);padding:20px 22px;margin-bottom:4px}
.grammar-exp-badge{display:inline-block;font-family:'DM Mono',monospace;font-size:9px;letter-spacing:1.5px;text-transform:uppercase;color:var(--red);background:var(--red-light);border-radius:4px;padding:3px 8px;margin-bottom:14px}
.grammar-exp-content{color:var(--text2);font-size:13.5px;line-height:1.75}
.grammar-exp-para{margin:0 0 12px}
.grammar-exp-para:last-child{margin-bottom:0}
.grammar-exp-examples{margin-top:20px;border-top:1px solid var(--border);padding-top:16px}
.grammar-exp-examples-heading{font-family:'DM Mono',monospace;font-size:9px;letter-spacing:1.5px;text-transform:uppercase;color:var(--text3);margin-bottom:10px}
.grammar-exp-row{display:grid;grid-template-columns:1fr 1fr;gap:4px 16px;padding:9px 0;border-bottom:1px solid var(--border);align-items:baseline}
.grammar-exp-row:last-child{border-bottom:none}
.grammar-exp-da{font-family:'Fraunces',serif;font-size:15px;color:var(--text);grid-column:1}
.grammar-exp-en{font-size:13px;color:var(--text2);grid-column:2;align-self:center}
.grammar-exp-note{font-size:11.5px;color:var(--text3);font-style:italic;grid-column:1/-1;margin-top:1px}
.grammar-highlight{background:var(--red-light);color:var(--red);border-radius:3px;padding:0 2px;font-style:normal;font-weight:600}

/* ── TRANSLATION ── */
.translation-item{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:start;margin-bottom:12px;padding:14px;background:var(--surface2);border-radius:var(--radius);border:1px solid var(--border)}
.translation-item:last-child{margin-bottom:0}
.translation-prompt{font-family:'Fraunces',serif;font-size:15px;color:var(--text);font-style:italic;padding-right:8px;line-height:1.4}
.translation-input{width:100%;padding:8px 12px;font-family:'Fraunces',serif;font-size:15px;border:1.5px solid var(--border2);border-radius:var(--radius);background:var(--surface);color:var(--text)}
.translation-input:focus{border-color:var(--red);box-shadow:0 0 0 2px var(--red-light)}
.translation-input.correct{border-color:var(--green);background:var(--green-light)}
.translation-input.wrong{border-color:var(--red);background:var(--red-light)}
.translation-correction{font-size:11px;color:var(--green);margin-top:4px;display:block}

/* ── READING ── */
.reading-text{font-family:'Fraunces',serif;font-size:17px;line-height:1.9;color:var(--text);margin-bottom:20px;padding:20px;background:var(--surface2);border-radius:var(--radius);border-left:3px solid var(--red)}
.glossary{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px}
.gloss-item{font-size:11px;padding:3px 10px;background:var(--surface);border:1px solid var(--border);border-radius:12px;color:var(--text2)}
.gloss-da{font-weight:600;color:var(--text)}
.gloss-highlight{border-bottom:1.5px solid var(--red);padding:0 1px;cursor:pointer;position:relative;display:inline}
.gloss-highlight::after{content:attr(data-gloss);position:absolute;bottom:calc(100% + 7px);left:50%;transform:translateX(-50%);background:var(--text);color:var(--surface);border-radius:5px;padding:3px 10px;font-family:'DM Sans',sans-serif;font-size:12px;font-weight:500;white-space:nowrap;pointer-events:none;opacity:0;transition:opacity 0.15s;z-index:20}
.gloss-highlight:hover::after{opacity:1}
.gloss-audio-btn{background:none;border:none;cursor:pointer;font-size:11px;padding:0 1px;opacity:0.45;transition:opacity 0.15s;line-height:1;vertical-align:middle;color:var(--red);pointer-events:auto}
.gloss-audio-btn:hover{opacity:1}

/* ── CULTURAL NOTE ── */
.cultural-card{background:linear-gradient(135deg,#fdf6ec,#fef9f0);border:1px solid #e8d5a0;border-radius:var(--radius-lg);padding:24px}
.dialect-card{background:linear-gradient(135deg,rgba(92,107,192,0.06),rgba(92,107,192,0.02));border:1px solid rgba(92,107,192,0.25);border-left:4px solid #5c6bc0;border-radius:var(--radius-lg);padding:20px 22px;margin-top:4px}
.dialect-flag{font-size:22px;margin-bottom:8px}
.dialect-heading{font-family:'Fraunces',serif;font-size:15px;font-weight:600;color:#3949ab;margin-bottom:8px}
.dialect-text{font-size:14px;color:var(--text2);line-height:1.7}
.cultural-flag{font-size:32px;margin-bottom:12px}
.cultural-heading{font-family:'Fraunces',serif;font-size:18px;font-weight:600;color:var(--text);margin-bottom:12px}
.cultural-text{font-size:14px;color:var(--text2);line-height:1.75}

/* ── LISTENING PLACEHOLDER ── */
.listening-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px;text-align:center;gap:12px;background:var(--surface2);border-radius:var(--radius);border:2px dashed var(--border2)}
.listening-icon{font-size:40px;opacity:0.4}
.listening-label{font-family:'Fraunces',serif;font-size:16px;color:var(--text3)}
.listening-sub{font-size:12px;color:var(--text3);max-width:300px;line-height:1.5}

/* ── VOCAB PRACTICE ── */
.practice-container{padding:8px 0 8px}
.practice-header{display:flex;align-items:center;gap:12px;margin-bottom:28px}
.practice-progress-label{font-family:'DM Mono',monospace;font-size:11px;color:var(--text3);white-space:nowrap;min-width:40px}
.practice-progress-bar{flex:1;height:4px;background:var(--surface2);border-radius:2px;overflow:hidden}
.practice-progress-fill{height:100%;background:var(--red);border-radius:2px;transition:width 0.35s ease}
.practice-type-label{font-family:'DM Mono',monospace;font-size:10px;letter-spacing:1.2px;text-transform:uppercase;color:var(--text3);margin-bottom:12px}
.practice-prompt{font-family:'Fraunces',serif;font-size:26px;font-weight:400;font-style:italic;color:var(--text);margin-bottom:8px;line-height:1.35}
.practice-hint{font-size:13px;color:var(--text3);margin-bottom:16px}
.practice-input{width:100%;box-sizing:border-box;font-family:'DM Sans',sans-serif;font-size:16px;padding:10px 14px;border:1.5px solid var(--border2);border-radius:var(--radius);background:var(--surface);color:var(--text);outline:none;transition:border-color 0.15s,background 0.15s}
.practice-input:focus{border-color:var(--red)}
.practice-input-correct{border-color:var(--green)!important;background:var(--green-light)!important}
.practice-input-incorrect{border-color:var(--red)!important;background:var(--red-light)!important}
.practice-feedback{font-size:13px;font-weight:600;margin-top:12px;padding:9px 14px;border-radius:var(--radius)}
.practice-feedback-correct{color:var(--green);background:var(--green-light);border:1px solid var(--green-border)}
.practice-feedback-incorrect{color:var(--red);background:var(--red-light);border:1px solid var(--red-border)}
.practice-complete{max-width:420px;margin:40px auto;text-align:center;padding:20px}
.practice-complete-sub{font-size:15px;color:var(--text2);margin-top:8px;font-family:'DM Mono',monospace}

/* ── UNIT COMPLETE ── */
.complete-screen{max-width:520px;margin:0 auto;padding:60px 20px;text-align:center}
.complete-icon{font-size:56px;margin-bottom:20px}
.complete-title{font-family:'Fraunces',serif;font-size:36px;font-weight:400;font-style:italic;color:var(--text);margin-bottom:8px}
.complete-sub{font-size:14px;color:var(--text2);margin-bottom:32px;line-height:1.6}
.score-breakdown{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;margin-bottom:28px;text-align:left;box-shadow:var(--shadow-sm)}
.score-row{display:flex;align-items:center;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--border);font-size:13px}
.score-row:last-child{border-bottom:none}
.score-label{color:var(--text2)}
.score-val{font-weight:600;font-family:'DM Mono',monospace;font-size:12px}
.score-val.pass{color:var(--green)}
.score-val.fail{color:var(--red)}
.score-overall{padding-top:12px;margin-top:4px;border-top:2px solid var(--border);font-size:15px;font-weight:600}
.complete-actions{display:flex;gap:10px;justify-content:center}

/* ── BUTTONS ── */
.btn{font-family:'DM Sans',sans-serif;font-weight:600;font-size:12px;letter-spacing:0.8px;padding:9px 22px;border-radius:4px;border:none;text-transform:uppercase}
.btn-primary{background:var(--red);color:#fff}
.btn-primary:hover:not(:disabled){background:#a83330}
.btn-secondary{background:transparent;color:var(--text2);border:1.5px solid var(--border2)}
.btn-secondary:hover:not(:disabled){background:var(--surface2)}
.btn-success{background:var(--green);color:#fff}
.btn-success:hover:not(:disabled){background:#235f3e}
.check-bar{display:flex;justify-content:flex-end;gap:8px;margin-top:18px;padding-top:16px;border-top:1px solid var(--border)}

/* ── ANIMATIONS ── */
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.fade-up{animation:fadeUp 0.35s ease both}
@keyframes pop{0%{transform:scale(0.95)}60%{transform:scale(1.03)}100%{transform:scale(1)}}
.pop{animation:pop 0.25s ease both}

/* ── MODE TABBAR (German / multi-mode) ── */
.mode-tabbar{background:var(--surface);border-bottom:1px solid var(--border);display:flex;padding:0 24px;position:sticky;top:52px;z-index:99}
.mode-tabbar-btn{font-family:'DM Sans',sans-serif;font-weight:600;font-size:11px;letter-spacing:0.8px;padding:12px 20px;border:none;border-bottom:2px solid transparent;margin-bottom:-1px;background:transparent;color:var(--text3);cursor:pointer;text-transform:uppercase;transition:all 0.15s}
.mode-tabbar-btn:hover{color:var(--text2)}
.mode-tabbar-btn.active{color:var(--red);border-bottom-color:var(--red)}
.btn-pill{font-family:'DM Mono',monospace;font-size:10px;letter-spacing:0.8px;padding:4px 12px;border:1px solid var(--border2);border-radius:20px;background:transparent;color:var(--text2);cursor:pointer;transition:all 0.15s;white-space:nowrap}
.btn-pill:hover{border-color:var(--red);color:var(--red)}

/* ── RESPONSIVE ── */
@media(max-width:560px){
  .mc-options{grid-template-columns:1fr}
  .translation-item{grid-template-columns:1fr}
  .matching-grid{gap:6px 10px}
  .vocab-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  /* Topbar */
  .topbar{padding:0 12px;gap:8px}
  .topbar-right{gap:6px}
  .topbar-course{display:none}
  .topbar-sep{display:none}

  /* Mode tab bar */
  .mode-tabbar{padding:0 12px}
  .mode-tabbar-btn{padding:10px 12px;font-size:10px}

  /* Map / module view */
  .map-container{padding:20px 12px 60px}
  .unit-container{padding:16px 12px 60px}
  .map-hero{margin-bottom:20px}
  .unit-grid{grid-template-columns:1fr}

  /* Exercises */
  .section-body{padding:14px}
  .section-header{padding:14px 16px}
  .fill-input{width:80px}
  .matching-grid{grid-template-columns:1fr}

  /* Small labels — bump 9px fonts to 11px for readability */
  .unit-week{font-size:11px}
  .section-type-badge{font-size:11px}
  .grammar-exp-badge{font-size:11px}
  .grammar-table th{font-size:11px;letter-spacing:0.8px;padding:6px 8px}
  .grammar-table td{padding:5px 6px}
  .disc-unseen-pill{font-size:11px}

  /* Instructor dashboard */
  .inst-wrap{padding:16px 12px 60px}
  .inst-unit-grid{grid-template-columns:1fr}
  .inst-student-row{grid-template-columns:1fr auto auto 28px}
}
/* ── Instructor Dashboard ─────────────────────────────────────────────────── */

.inst-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 32px 20px 80px;
  width: 100%;
}

.inst-loading, .inst-error, .inst-empty {
  text-align: center;
  padding: 60px 20px;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  color: var(--text3);
}

.inst-error {
  background: var(--red-light);
  border: 1px solid var(--red-border);
  border-radius: var(--radius);
  color: var(--red);
  text-align: left;
  padding: 16px 20px;
  margin-top: 20px;
}

.inst-spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--border);
  border-top: 3px solid var(--red);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}

/* ── Header ── */
.inst-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 12px;
  flex-wrap: wrap;
}

.inst-title {
  font-family: 'Fraunces', serif;
  font-size: 26px;
  font-weight: 300;
  font-style: italic;
  color: var(--text);
  margin-bottom: 4px;
}

.inst-sub {
  font-size: 13px;
  color: var(--text3);
}

.inst-refresh-btn {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: 7px 16px;
  border-radius: 4px;
  border: 1.5px solid var(--border2);
  background: transparent;
  color: var(--text2);
  cursor: pointer;
  font-family: 'DM Mono', monospace;
  transition: all 0.15s;
}
.inst-refresh-btn:hover { background: var(--surface2); }

/* ── Roster table ── */
.inst-roster {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.inst-roster-head {
  display: grid;
  grid-template-columns: 1fr 140px 80px 110px 32px;
  padding: 9px 20px;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  font-family: 'DM Mono', monospace;
  font-size: 9px;
  letter-spacing: 1.5px;
  color: var(--text3);
  text-transform: uppercase;
}

.inst-student-block { border-bottom: 1px solid var(--border); }
.inst-student-block:last-child { border-bottom: none; }

.inst-student-row {
  display: grid;
  grid-template-columns: 1fr 140px 80px 110px 32px;
  padding: 13px 20px;
  align-items: center;
  cursor: pointer;
  transition: background 0.12s;
  user-select: none;
}
.inst-student-row:hover { background: #faf8f5; }
.inst-student-block.open .inst-student-row { background: #faf8f5; }

/* ── Columns ── */
.inst-col-name   { display: flex; align-items: center; gap: 10px; }
.inst-col-units  { display: flex; align-items: center; gap: 8px; }
.inst-col-score  { display: flex; align-items: center; }
.inst-col-date   { font-family: 'DM Mono', monospace; font-size: 11px; color: var(--text3); }
.inst-col-action { display: flex; align-items: center; justify-content: flex-end; }

.inst-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--surface2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Fraunces', serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--text2);
  flex-shrink: 0;
}

.inst-name  { font-size: 13px; font-weight: 500; color: var(--text); line-height: 1.3; }
.inst-email { font-size: 11px; color: var(--text3); font-family: 'DM Mono', monospace; }

.inst-progress-mini {
  height: 4px;
  width: 60px;
  background: var(--surface2);
  border-radius: 2px;
  overflow: hidden;
  flex-shrink: 0;
}
.inst-progress-mini-fill {
  height: 100%;
  background: var(--red);
  border-radius: 2px;
  transition: width 0.5s ease;
}

.inst-units-label {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--text2);
  white-space: nowrap;
}

/* ── Score pills ── */
.inst-pill {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 10px;
  border: 1px solid;
  white-space: nowrap;
}
.inst-pill-pass    { background: var(--green-light); color: var(--green); border-color: var(--green-border); }
.inst-pill-mid     { background: rgba(180,140,20,0.10); color: #7a6010; border-color: rgba(180,140,20,0.35); }
.inst-pill-fail    { background: var(--red-light); color: var(--red); border-color: var(--red-border); }
.inst-pill-neutral { background: var(--surface2); color: var(--text3); border-color: var(--border); }

.inst-chevron { color: var(--text3); font-size: 13px; transition: transform 0.2s; }
.inst-chevron.open { transform: rotate(180deg); }

/* ── Detail panel ── */
.inst-detail {
  padding: 16px 20px 20px;
  background: #faf8f5;
  border-top: 1px solid var(--border);
}

.inst-detail-loading {
  font-size: 12px;
  color: var(--text3);
  text-align: center;
  padding: 16px;
}

.inst-detail-title {
  font-family: 'DM Mono', monospace;
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 12px;
}

/* ── Sortable roster header buttons ── */
.inst-sort-btn{background:none;border:none;cursor:pointer;font-family:'DM Mono',monospace;font-size:9px;letter-spacing:1.5px;text-transform:uppercase;color:var(--text3);padding:0;display:flex;align-items:center;gap:3px;transition:color 0.12s;white-space:nowrap}
.inst-sort-btn:hover{color:var(--text2)}
.inst-sort-btn.active{color:var(--red)}
.inst-sort-ind{font-size:8px;opacity:0.8}

/* ── Unit grid ── */
.inst-unit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 6px;
  margin-bottom: 4px;
}

.inst-unit-cell {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 12px;
  opacity: 0.55;
  transition: opacity 0.15s;
}
.inst-unit-cell.done { opacity: 1; border-color: var(--green-border); }
.inst-unit-cell.clickable { cursor: pointer; }
.inst-unit-cell.clickable:hover { border-color: var(--red-border, rgba(200,64,58,0.35)); background: var(--surface2); }
.inst-unit-cell.expanded { border-color: var(--red) !important; box-shadow: 0 0 0 1px rgba(200,64,58,0.15); }

/* ── Section drill-down panel ── */
.inst-section-panel { background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; margin-top: 10px; margin-bottom: 4px; }
.inst-section-panel-title { font-family: 'DM Mono', monospace; font-size: 9px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text3); margin-bottom: 12px; }
.inst-section-row { display: grid; grid-template-columns: 160px 1fr 38px 50px; gap: 8px; align-items: center; margin-bottom: 7px; }
.inst-section-row:last-child { margin-bottom: 0; }
.inst-section-label { font-family: 'DM Mono', monospace; font-size: 10px; color: var(--text2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.inst-section-bar-track { height: 7px; background: var(--border); border-radius: 4px; overflow: hidden; }
.inst-section-bar-fill { height: 100%; border-radius: 4px; transition: width 0.45s ease; }
.inst-section-pct { font-family: 'DM Mono', monospace; font-size: 10px; color: var(--text); text-align: right; font-weight: 500; }
.inst-section-frac { font-family: 'DM Mono', monospace; font-size: 9px; color: var(--text3); text-align: right; white-space: nowrap; }

/* ── Stale student indicator ── */
.inst-stale-date { color: #b87c20; }
.inst-stale-dot { display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: #b87c20; margin-left: 5px; vertical-align: middle; flex-shrink: 0; }
.inst-never-label { color: var(--text3); font-style: italic; }

/* ── Class archiving ── */
.inst-archived-toggle { background: none; border: none; font-family: 'DM Mono', monospace; font-size: 9px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--text3); cursor: pointer; padding: 2px 0; margin-bottom: 10px; transition: color 0.12s; display: block; }
.inst-archived-toggle:hover { color: var(--text2); }
.inst-archived-list { background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius); padding: 4px 10px; margin-bottom: 14px; }
.inst-archived-row { display: flex; align-items: center; gap: 8px; padding: 7px 2px; border-bottom: 1px solid var(--border); }
.inst-archived-row:last-child { border-bottom: none; }
.inst-archived-name { flex: 1; font-size: 12px; color: var(--text2); }

.inst-unit-cell-id {
  font-family: 'DM Mono', monospace;
  font-size: 8px;
  letter-spacing: 1px;
  color: var(--text3);
  margin-bottom: 3px;
  text-transform: uppercase;
}

.inst-unit-cell-title {
  font-size: 11px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 6px;
}

.inst-unit-cell-bottom {
  display: flex;
  align-items: center;
  gap: 6px;
}

.inst-unit-date {
  font-family: 'DM Mono', monospace;
  font-size: 9px;
  color: var(--text3);
}

/* ── Class stats panel ── */
.inst-stats-panel{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:18px 20px;margin-bottom:16px}
.inst-stats-kpi-row{display:flex;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;margin-bottom:18px}
.inst-stats-kpi{flex:1;padding:11px 14px;border-right:1px solid var(--border)}
.inst-stats-kpi:last-child{border-right:none}
.inst-stats-kpi-label{font-family:'DM Mono',monospace;font-size:9px;letter-spacing:1.2px;text-transform:uppercase;color:var(--text3);margin-bottom:4px}
.inst-stats-kpi-value{font-family:'Fraunces',serif;font-size:20px;font-weight:600;color:var(--text);line-height:1.1}
.inst-stats-kpi-value.green{color:var(--green)}
.inst-stats-kpi-value.amber{color:#b87c20}
.inst-stats-kpi-value.red{color:var(--red)}
.inst-stats-section-h{font-family:'DM Mono',monospace;font-size:9px;letter-spacing:1.5px;text-transform:uppercase;color:var(--text3);margin-bottom:8px}
.inst-stats-cols{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.inst-stats-dist-row{display:grid;grid-template-columns:52px 1fr 22px;gap:7px;align-items:center;margin-bottom:5px}
.inst-stats-dist-row:last-child{margin-bottom:0}
.inst-stats-dist-label{font-family:'DM Mono',monospace;font-size:9px;color:var(--text2);white-space:nowrap}
.inst-stats-dist-track{height:7px;background:var(--border);border-radius:4px;overflow:hidden}
.inst-stats-dist-fill{height:100%;border-radius:4px;transition:width 0.5s ease}
.inst-stats-dist-count{font-family:'DM Mono',monospace;font-size:9px;color:var(--text3);text-align:right}
.inst-stats-mod-table{margin-top:14px}
.inst-stats-mod-head{display:grid;grid-template-columns:1fr 44px 60px 90px;gap:6px;font-family:'DM Mono',monospace;font-size:9px;letter-spacing:1px;text-transform:uppercase;color:var(--text3);padding:0 6px;margin-bottom:5px}
.inst-stats-mod-row{display:grid;grid-template-columns:1fr 44px 60px 90px;gap:6px;align-items:center;padding:6px 6px;border-radius:var(--radius)}
.inst-stats-mod-row:hover{background:var(--surface)}
.inst-stats-mod-name{font-size:11px;font-weight:500;color:var(--text);line-height:1.2}
.inst-stats-mod-cefr{font-family:'DM Mono',monospace;font-size:9px;font-weight:700;text-align:center;padding:2px 4px;border-radius:3px;border:1px solid currentColor}
.inst-stats-mod-avg{text-align:center}
.inst-stats-mod-prog{display:flex;align-items:center;gap:5px;font-family:'DM Mono',monospace;font-size:9px;color:var(--text2)}
@media(max-width:600px){.inst-stats-cols{grid-template-columns:1fr}.inst-stats-mod-head{display:none}.inst-stats-mod-row{grid-template-columns:1fr auto auto}}

/* ── Module summary ── */
.inst-module-row-head {
  display: grid;
  grid-template-columns: 1fr 60px 140px 70px;
  padding: 7px 10px;
  font-family: 'DM Mono', monospace;
  font-size: 9px;
  letter-spacing: 1.5px;
  color: var(--text3);
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

.inst-module-row {
  display: grid;
  grid-template-columns: 1fr 60px 140px 70px;
  align-items: center;
  padding: 8px 10px;
  border-radius: var(--radius);
  gap: 8px;
  font-size: 12px;
}
.inst-module-row:hover { background: var(--surface); }

.inst-mod-title { color: var(--text); font-weight: 500; }
.inst-mod-cefr  {
  font-family: 'DM Mono', monospace;
  font-size: 9px;
  padding: 2px 7px;
  border-radius: 8px;
  border: 1px solid;
  width: fit-content;
}
.inst-mod-progress {
  display: flex;
  align-items: center;
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--text2);
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .inst-roster-head { display: none; }
  .inst-student-row {
    grid-template-columns: 1fr auto auto 28px;
    grid-template-rows: auto auto;
  }
  .inst-col-date { display: none; }
  .inst-unit-grid { grid-template-columns: 1fr 1fr; }
  .inst-module-row-head { display: none; }
  .inst-module-row { grid-template-columns: 1fr auto auto; }
  .inst-mod-progress { display: none; }
}


/* ── Class management panel ── */
.inst-class-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}
.inst-class-header {
  padding: 14px 20px;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.inst-class-header-left { display: flex; flex-direction: column; gap: 2px; }
.inst-class-name { font-family: 'Fraunces', serif; font-size: 17px; font-weight: 600; color: var(--text); }
.inst-class-lang { font-family: 'DM Mono', monospace; font-size: 9px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text3); }
.inst-class-header-right { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.inst-code-box {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--surface);
  border: 1.5px solid var(--border2);
  border-radius: var(--radius);
}
.inst-code-val {
  font-family: 'DM Mono', monospace;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--text);
}
.inst-code-label { font-size: 9px; color: var(--text3); letter-spacing: 1px; text-transform: uppercase; display: block; margin-bottom: 1px; }
.inst-code-copied { font-size: 10px; color: var(--green); font-weight: 600; }
.btn-icon-sm {
  background: transparent;
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 5px 10px;
  font-size: 11px;
  color: var(--text2);
  cursor: pointer;
  font-family: 'DM Mono', monospace;
  letter-spacing: 0.5px;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-icon-sm:hover { background: var(--surface2); }
.btn-icon-sm:disabled { opacity: 0.4; cursor: not-allowed; }

/* Create class form */
.inst-create-form {
  padding: 24px;
}
.inst-create-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--text2);
  margin-bottom: 6px;
  display: block;
}
.inst-create-input {
  width: 100%;
  padding: 10px 14px;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  border: 1.5px solid var(--border2);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  margin-bottom: 16px;
}
.inst-create-input:focus { outline: none; border-color: var(--red); }
.btn-create-class {
  padding: 9px 22px;
  background: var(--red);
  color: #fff;
  border: none;
  border-radius: 4px;
  font-family: 'DM Sans', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-create-class:hover:not(:disabled) { background: #a83330; }
.btn-create-class:disabled { opacity: 0.5; cursor: not-allowed; }

/* Remove student button */
.inst-remove-btn {
  background: transparent;
  border: none;
  color: var(--text3);
  font-size: 13px;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
  transition: all 0.15s;
  line-height: 1;
}
.inst-remove-btn:hover { color: var(--red); background: var(--red-light); }
.inst-share-hint { font-size: 11px; color: var(--text3); padding: 10px 20px 14px; border-top: 1px solid var(--border); }
.inst-share-hint a { color: var(--red); text-decoration: none; }
.inst-share-hint a:hover { text-decoration: underline; }
.inst-class-loading { font-size: 12px; color: var(--text3); text-align: center; padding: 20px; }

/* ── DISCUSSION PANEL (student, fixed bottom) ─────────────────────────────── */
.disc-panel{position:fixed;bottom:0;left:0;right:0;z-index:80;max-width:900px;margin:0 auto;background:var(--surface);border:1px solid var(--border);border-bottom:none;border-radius:10px 10px 0 0;box-shadow:0 -4px 24px rgba(0,0,0,0.10)}
.disc-panel-bar{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;cursor:pointer;user-select:none;border-radius:10px 10px 0 0;transition:background 0.15s}
.disc-panel-bar:hover{background:var(--surface2)}
.disc-panel-label{font-family:'DM Sans',sans-serif;font-size:13px;font-weight:600;color:var(--text);display:flex;align-items:center;gap:8px}
.disc-unseen-pill{background:var(--red);color:#fff;font-size:9px;font-weight:700;letter-spacing:0.5px;padding:2px 7px;border-radius:20px}
.disc-panel-chevron{font-size:11px;color:var(--text3)}
.disc-panel-posts{max-height:55vh;overflow-y:auto;border-top:1px solid var(--border);padding:12px 16px;display:flex;flex-direction:column;gap:10px}
.disc-panel-posts::-webkit-scrollbar{width:4px}
.disc-panel-posts::-webkit-scrollbar-thumb{background:var(--border2);border-radius:2px}
/* Post card */
.disc-post-card{background:var(--surface2);border:1px solid var(--border);border-radius:8px;overflow:hidden;transition:border-color 0.15s}
.disc-post-card:hover{border-color:var(--border2)}
.disc-post-unseen{border-left:3px solid var(--red)}
.disc-post-card-header{display:flex;align-items:flex-start;justify-content:space-between;padding:12px 14px;cursor:pointer;gap:8px}
.disc-post-card-body{flex:1;min-width:0}
.disc-post-card-title{font-family:'Fraunces',serif;font-size:14px;font-weight:600;color:var(--text);margin-bottom:3px}
.disc-post-card-prompt{font-size:13px;color:var(--text2);line-height:1.5;margin-bottom:6px}
.disc-post-card-row{display:flex;align-items:center;flex-wrap:wrap;gap:8px}
.disc-lang-req{font-family:'DM Mono',monospace;font-size:9px;letter-spacing:1px;text-transform:uppercase;background:var(--red-light);color:var(--red);border:1px solid var(--red-border);padding:2px 7px;border-radius:10px}
.disc-expiry-label{font-size:11px;color:var(--text3)}
.disc-rcount{font-size:11px;color:var(--text3)}
.disc-new-dot{width:7px;height:7px;border-radius:50%;background:var(--red);display:inline-block}
.disc-toggle-arrow{font-size:11px;color:var(--text3);flex-shrink:0;margin-top:2px}
/* Thread */
.disc-thread{padding:0 14px 14px;border-top:1px solid var(--border);background:var(--surface)}
.disc-thread-msg{font-size:12px;color:var(--text3);padding:10px 0;text-align:center}
.disc-reply{padding:10px 0;border-bottom:1px solid var(--border)}
.disc-reply:last-of-type{border-bottom:none}
.disc-reply-pinned{background:rgba(200,64,58,0.04);margin:0 -14px;padding:10px 14px;border-left:3px solid var(--red)}
.disc-pin-label{font-size:10px;font-weight:600;color:var(--red);margin-bottom:4px;letter-spacing:0.3px}
.disc-reply-content{font-size:13px;color:var(--text);line-height:1.55;white-space:pre-wrap}
.disc-reply-time{font-size:10px;color:var(--text3);margin-top:4px}
.disc-reply-form{padding-top:12px}
.disc-reply-input{width:100%;padding:9px 12px;border:1.5px solid var(--border2);border-radius:6px;font-family:'DM Sans',sans-serif;font-size:13px;color:var(--text);background:var(--surface);resize:vertical;min-height:72px;line-height:1.5}
.disc-reply-input:focus{outline:none;border-color:var(--red);box-shadow:0 0 0 3px var(--red-light)}
.disc-err{font-size:11px;color:var(--red);margin-top:4px}
.disc-submit-btn{margin-top:8px;padding:8px 18px;background:var(--red);color:#fff;border:none;border-radius:6px;font-family:'DM Sans',sans-serif;font-size:12px;font-weight:600;cursor:pointer;transition:background 0.15s}
.disc-submit-btn:hover:not(:disabled){background:#b33430}
.disc-submit-btn:disabled{opacity:0.5;cursor:not-allowed}
/* Extra bottom padding so fixed panel doesn't overlap page content */
.app > *:last-child { padding-bottom: 56px; }

/* ── INSTRUCTOR DISCUSSION SECTION ────────────────────────────────────────── */
.disc-inst-section{background:var(--surface2);border:1px solid var(--border);border-radius:10px;margin-bottom:20px;overflow:hidden}
.disc-inst-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px}
.disc-inst-title{font-family:'Fraunces',serif;font-size:16px;font-weight:600;color:var(--text)}
.disc-inst-sub{font-size:12px;color:var(--text3);margin-top:2px}
.disc-new-btn{padding:6px 14px;background:var(--red);color:#fff;border:none;border-radius:6px;font-family:'DM Sans',sans-serif;font-size:11px;font-weight:600;cursor:pointer;transition:background 0.15s}
.disc-new-btn:hover{background:#b33430}
.disc-comp-form{padding:0 20px 20px;border-top:1px solid var(--border)}
.disc-comp-row{display:flex;flex-direction:column;gap:4px;margin-top:12px}
.disc-comp-row-inline{flex-direction:row;align-items:flex-end;gap:16px}
.disc-comp-label{font-size:11px;font-weight:600;color:var(--text2);letter-spacing:0.3px}
.disc-comp-input{padding:8px 10px;border:1.5px solid var(--border2);border-radius:6px;font-family:'DM Sans',sans-serif;font-size:13px;color:var(--text);background:var(--surface)}
.disc-comp-input:focus{outline:none;border-color:var(--red)}
.disc-comp-select{padding:8px 10px;border:1.5px solid var(--border2);border-radius:6px;font-family:'DM Sans',sans-serif;font-size:13px;color:var(--text);background:var(--surface)}
.disc-comp-textarea{padding:8px 10px;border:1.5px solid var(--border2);border-radius:6px;font-family:'DM Sans',sans-serif;font-size:13px;color:var(--text);background:var(--surface);resize:vertical;line-height:1.5}
.disc-comp-textarea:focus,.disc-comp-input:focus,.disc-comp-select:focus{outline:none;border-color:var(--red)}
.disc-comp-check-label{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text2);cursor:pointer;white-space:nowrap;padding-bottom:8px}
.disc-comp-btn{margin-top:14px;padding:9px 20px;background:var(--red);color:#fff;border:none;border-radius:6px;font-family:'DM Sans',sans-serif;font-size:13px;font-weight:600;cursor:pointer;transition:background 0.15s}
.disc-comp-btn:hover:not(:disabled){background:#b33430}
.disc-comp-btn:disabled{opacity:0.5;cursor:not-allowed}
.disc-inst-loading,.disc-inst-empty{font-size:12px;color:var(--text3);padding:16px 20px;text-align:center}
.disc-posts-list{border-top:1px solid var(--border)}
.disc-post-item{border-bottom:1px solid var(--border)}
.disc-post-item:last-child{border-bottom:none}
.disc-post-item-header{display:flex;align-items:flex-start;justify-content:space-between;padding:12px 16px;cursor:pointer;gap:8px;transition:background 0.1s}
.disc-post-item-header:hover{background:rgba(0,0,0,0.02)}
.disc-post-item-left{flex:1;min-width:0}
.disc-post-item-badges{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:5px}
.disc-badge-live{background:rgba(45,122,80,0.1);color:#2d7a50;border:1px solid rgba(45,122,80,0.25);font-family:'DM Mono',monospace;font-size:9px;letter-spacing:1px;text-transform:uppercase;padding:2px 7px;border-radius:10px}
.disc-badge-closed{background:rgba(200,64,58,0.08);color:var(--red);border:1px solid var(--red-border);font-family:'DM Mono',monospace;font-size:9px;letter-spacing:1px;text-transform:uppercase;padding:2px 7px;border-radius:10px}
.disc-badge-expired{background:var(--surface2);color:var(--text3);border:1px solid var(--border);font-family:'DM Mono',monospace;font-size:9px;letter-spacing:1px;text-transform:uppercase;padding:2px 7px;border-radius:10px}
.disc-badge-da{font-family:'DM Mono',monospace;font-size:9px;letter-spacing:1px;padding:2px 7px;border-radius:10px;background:rgba(200,64,58,0.06);color:var(--red);border:1px solid var(--red-border)}
.disc-post-item-title{font-family:'Fraunces',serif;font-size:14px;font-weight:600;color:var(--text);margin-bottom:2px}
.disc-post-item-prompt{font-size:12px;color:var(--text2);line-height:1.5;margin-bottom:4px}
.disc-post-item-meta{font-size:10px;color:var(--text3);font-family:'DM Mono',monospace;letter-spacing:0.3px}
.disc-post-item-actions{display:flex;gap:6px;flex-shrink:0}
.disc-inst-btn{padding:5px 10px;font-family:'DM Sans',sans-serif;font-size:11px;font-weight:600;border-radius:6px;border:1.5px solid;cursor:pointer;transition:all 0.15s}
.disc-inst-btn-close{color:var(--text2);border-color:var(--border2);background:var(--surface)}
.disc-inst-btn-close:hover{border-color:var(--text2)}
.disc-inst-btn-delete{color:var(--red);border-color:var(--red-border);background:var(--red-light)}
.disc-inst-btn-delete:hover{background:#fee2e2}
.disc-inst-thread{padding:0 16px 12px;background:var(--surface);border-top:1px solid var(--border)}
.disc-inst-no-replies{font-size:12px;color:var(--text3);padding:10px 0}
.disc-inst-reply{padding:10px 0;border-bottom:1px solid var(--border)}
.disc-inst-reply:last-child{border-bottom:none}
.disc-inst-reply-pinned{background:rgba(200,64,58,0.04);margin:0 -16px;padding:10px 16px;border-left:3px solid var(--red)}
.disc-pin-badge{font-size:10px;font-weight:600;color:var(--red);margin-right:8px}
.disc-inst-reply-top{display:flex;align-items:center;gap:8px;margin-bottom:4px}
.disc-inst-reply-author{font-size:12px;font-weight:600;color:var(--text)}
.disc-inst-reply-time{font-size:10px;color:var(--text3);margin-left:auto}
.disc-inst-reply-content{font-size:12px;color:var(--text2);line-height:1.55;white-space:pre-wrap}
.disc-inst-reply-controls{display:flex;gap:6px;margin-top:6px}
.disc-ctrl-btn{padding:3px 8px;font-family:'DM Sans',sans-serif;font-size:10px;font-weight:600;border:1px solid var(--border2);border-radius:4px;cursor:pointer;background:var(--surface);color:var(--text2);transition:all 0.15s}
.disc-ctrl-btn:hover{border-color:var(--text2)}
.disc-ctrl-del{color:var(--red);border-color:var(--red-border);background:var(--red-light)}
.disc-ctrl-del:hover{background:#fee2e2}

/* ── Language toggle (multi-language instructors) ── */
.inst-lang-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.inst-lang-tab{padding:6px 16px;border:none;border-radius:20px;font-family:'DM Sans',sans-serif;font-size:12px;font-weight:600;cursor:pointer;transition:all 0.15s;background:var(--surface2);color:var(--text2);letter-spacing:0.2px}
.inst-lang-tab:hover{background:var(--border2);color:var(--text)}
.inst-lang-tab.active{background:var(--red);color:#fff;box-shadow:0 2px 8px rgba(200,64,58,0.22)}

/* ── Class selector ── */
.inst-class-tabs{display:flex;gap:6px;flex-wrap:wrap;align-items:center;margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid var(--border)}
.inst-class-tab{display:flex;align-items:center;gap:5px;padding:6px 13px;border:1.5px solid var(--border2);border-radius:20px;background:transparent;color:var(--text2);font-family:'DM Sans',sans-serif;font-size:12px;font-weight:500;cursor:pointer;transition:all 0.15s;white-space:nowrap}
.inst-class-tab:hover{border-color:var(--red);color:var(--text)}
.inst-class-tab.active{border-color:var(--red);background:var(--red-light);color:var(--red)}
.inst-class-tab-lang{font-family:'DM Mono',monospace;font-size:8px;letter-spacing:1px;text-transform:uppercase;opacity:0.6;margin-right:2px}
.inst-new-class-btn{padding:6px 13px;border:1.5px dashed var(--border2);border-radius:20px;background:transparent;color:var(--text3);font-family:'DM Sans',sans-serif;font-size:12px;cursor:pointer;transition:all 0.15s;white-space:nowrap}
.inst-new-class-btn:hover{border-color:var(--red);color:var(--red)}
.inst-create-inline{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;margin-bottom:20px}
.inst-create-inline-row{display:flex;gap:12px;flex-wrap:wrap}
.inst-create-lang-select{width:100%;padding:10px 14px;font-family:'DM Sans',sans-serif;font-size:14px;border:1.5px solid var(--border2);border-radius:var(--radius);background:var(--bg);color:var(--text);margin-bottom:0}
.inst-create-lang-select:focus{outline:none;border-color:var(--red)}
.inst-class-info-bar{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg) var(--radius-lg) 0 0;padding:14px 20px;margin-bottom:0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.inst-class-info-left{display:flex;flex-direction:column;gap:2px}
.inst-class-desc-inline{font-size:11px;color:var(--text3);font-style:italic;margin-top:2px}
.inst-class-info-right{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.inst-share-hint-bar{font-size:11px;color:var(--text3);padding:8px 20px 12px;background:var(--surface);border:1px solid var(--border);border-top:none;border-radius:0 0 var(--radius-lg) var(--radius-lg);margin-bottom:20px}
.inst-share-hint-bar a{color:var(--red);text-decoration:none}
.inst-share-hint-bar a:hover{text-decoration:underline}

/* ── Hover Video Widget ──────────────────────────────────────────────────── */
/* Used in: LanguageIntro (map), CulturalNote (animation), and anywhere else  */
/* a hover-to-play animated clip is needed.                                    */
.hover-video-widget{position:relative;width:100%;max-width:540px;aspect-ratio:16/9;overflow:hidden;border-radius:10px;cursor:pointer;margin:0 auto 28px;background:var(--surface2);border:1px solid var(--border);box-shadow:0 4px 18px rgba(0,0,0,0.08)}
.hover-video-el{width:100%;height:100%;object-fit:cover;display:block}

/* Hint: fades out on hover */
.hover-video-hint{position:absolute;bottom:10px;right:12px;font-size:11px;color:rgba(255,255,255,0.92);background:rgba(0,0,0,0.40);padding:3px 9px;border-radius:4px;z-index:10;pointer-events:none;font-family:'DM Mono',monospace;transition:opacity 0.25s}
.hover-video-hint--idle{opacity:1}
.hover-video-widget:hover .hover-video-hint--idle{opacity:0}

/* Caption: bottom-left label */
.hover-video-caption{position:absolute;bottom:10px;left:12px;font-size:11px;color:rgba(255,255,255,0.92);background:rgba(0,0,0,0.40);padding:3px 9px;border-radius:4px;z-index:10;pointer-events:none;font-family:'DM Mono',monospace}

/* Placeholder when file is missing or errored */
.hover-video-placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;background:var(--surface2);color:var(--text3);font-size:13px;text-align:center;padding:24px;border:2px dashed var(--border2);border-radius:10px}
.hover-video-placeholder-hint{font-size:11px;color:var(--text3)}
.hover-video-placeholder code{font-family:'DM Mono',monospace;font-size:10px;background:var(--surface);padding:2px 6px;border-radius:3px;border:1px solid var(--border);color:var(--text2)}

/* When embedded inside a cultural-card, tighten the margin */
.cultural-card .hover-video-widget{max-width:100%;margin-bottom:16px}

/* ── POS (Part-of-Speech) Highlights ─────────────────────────────────────── */
.pos-key{display:flex;flex-wrap:wrap;gap:10px;margin:10px 0 16px;padding:10px 14px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}
.pos-key-item{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text2)}
.pos-key-swatch{width:20px;height:10px;border-radius:3px;display:inline-block;flex-shrink:0}
.pos-ex-row{font-size:17px;line-height:2.4;margin:4px 0}

/* ── Sentence Writing ─────────────────────────────────────────────────────── */
.sw-verb-box{margin:14px 0 12px;padding:14px 18px;background:var(--surface2);border-radius:8px;border-left:3px solid #c8403a}
.sw-verb-text{font-size:22px;font-weight:700;color:var(--text)}
.sw-verb-meaning{font-size:13px;color:var(--text3);margin-top:2px}
.sw-verb-hint{font-size:11px;color:var(--text3);font-style:italic;margin-top:8px;padding-top:8px;border-top:1px solid var(--border)}
.sw-feedback{margin-top:10px;display:flex;flex-direction:column;gap:8px}
.sw-feedback-correct{padding:8px 14px;background:rgba(45,122,80,0.08);border:1px solid rgba(45,122,80,0.25);border-radius:6px;color:var(--green);font-size:13px}
.sw-feedback-error{padding:8px 14px;background:rgba(200,64,58,0.06);border:1px solid rgba(200,64,58,0.2);border-radius:6px;color:#c8403a;font-size:13px}
.sw-feedback-spelling{padding:10px 14px;background:rgba(200,64,58,0.04);border:1px solid rgba(200,64,58,0.2);border-radius:6px}
.sw-feedback-grammar{padding:10px 14px;background:rgba(180,120,10,0.05);border:1px solid rgba(180,120,10,0.25);border-radius:6px}
.sw-feedback-label{font-family:'DM Mono',monospace;font-size:9px;letter-spacing:1px;margin-bottom:6px;text-transform:uppercase}
.sw-feedback-item{font-size:12px;color:var(--text2);margin-bottom:4px;line-height:1.5}

/* ── Language Intro section ──────────────────────────────────────────────── */
.lang-intro{max-width:640px;margin:0 auto}
.lang-intro-heading{font-family:'Fraunces',serif;font-size:20px;font-weight:600;color:var(--text);margin:0 0 12px}
.lang-intro-subheading{font-size:14px;font-weight:600;color:var(--text);margin:20px 0 5px}
.lang-intro-text{font-size:14px;color:var(--text2);line-height:1.75;margin:0 0 16px}
.lang-intro-facts{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:10px;margin:0 0 24px}
.lang-intro-fact{background:var(--surface2);border-radius:var(--radius);padding:10px 14px;display:flex;flex-direction:column;gap:3px;border:1px solid var(--border)}
.lang-intro-fact-label{font-size:10px;font-family:'DM Mono',monospace;color:var(--text3);text-transform:uppercase;letter-spacing:0.06em}
.lang-intro-fact-value{font-size:13px;font-weight:600;color:var(--text)}