/* ─── css/main.css ────────────────────────────────────────────────────────── */

:root {
  --bg:#0e0f0d;--surface:#161714;--surface2:#1e1f1c;
  --border:#2a2b27;--border2:#3a3b36;
  --text:#e8e6df;--text2:#8a887f;--text3:#5a5850;
  --accent:#c8f55a;--accent2:#a8d440;
  --accent-dim:rgba(200,245,90,.12);--accent-dim2:rgba(200,245,90,.06);
  --warn:#f5a623;--danger:#e85d3a;--info:#5ab4f5;
  --radius:12px;--radius-sm:8px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Instrument Sans',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden}
body::before{content:'';position:fixed;inset:0;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");pointer-events:none;z-index:0;opacity:.6}
#app{position:relative;z-index:1;max-width:820px;margin:0 auto;padding:0 24px 80px}
.header{display:flex;align-items:center;justify-content:space-between;padding:24px 0 20px;border-bottom:1px solid var(--border);margin-bottom:40px}
.logo{font-family:'DM Serif Display',serif;font-size:20px;letter-spacing:-.3px}
.logo span{color:var(--accent)}
.header-meta{display:flex;align-items:center;gap:16px}
.timer{font-family:'DM Mono',monospace;font-size:15px;font-weight:500;color:var(--text2);padding:6px 14px;background:var(--surface2);border:1px solid var(--border);border-radius:100px;transition:color .3s,border-color .3s}
.timer.warn{color:var(--warn);border-color:var(--warn)}
.timer.danger{color:var(--danger);border-color:var(--danger);animation:pulse 1s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.6}}
.progress-bar-wrap{height:3px;background:var(--border);border-radius:100px;margin-bottom:36px;overflow:hidden}
.progress-bar-fill{height:100%;background:var(--accent);border-radius:100px;transition:width .6s cubic-bezier(.4,0,.2,1)}
.section-tabs{display:flex;gap:8px;margin-bottom:32px;flex-wrap:wrap}
.tab{font-size:12px;font-weight:500;letter-spacing:.5px;padding:5px 12px;border-radius:100px;border:1px solid var(--border);color:var(--text3);background:transparent;text-transform:uppercase;transition:all .2s}
.tab.active{background:var(--accent-dim);border-color:var(--accent);color:var(--accent)}
.tab.done{background:var(--surface2);border-color:var(--border2);color:var(--text2)}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px;margin-bottom:20px;position:relative;overflow:hidden}
.card::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--border2),transparent)}
.card-label{font-size:11px;font-weight:600;letter-spacing:1.2px;text-transform:uppercase;color:var(--accent);margin-bottom:10px}
.card h2{font-family:'DM Serif Display',serif;font-size:26px;line-height:1.2;color:var(--text);margin-bottom:16px}
.card p{font-size:15px;line-height:1.7;color:var(--text2)}
.passage{background:var(--surface2);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:var(--radius-sm);padding:20px 24px;margin:20px 0;font-size:15px;line-height:1.8;color:var(--text);white-space:pre-wrap}
.mc-options{display:flex;flex-direction:column;gap:10px;margin-top:20px}
.mc-option{display:flex;align-items:flex-start;gap:14px;padding:14px 18px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:all .18s;font-size:14px;line-height:1.5;color:var(--text2);text-align:left;width:100%}
.mc-option:hover{border-color:var(--border2);color:var(--text);background:#222320}
.mc-option.selected{border-color:var(--accent);color:var(--text);background:var(--accent-dim)}
.mc-option.correct{border-color:#4ade80;color:#4ade80;background:rgba(74,222,128,.1)}
.mc-option.wrong{border-color:var(--danger);color:var(--danger);background:rgba(232,93,58,.1)}
.mc-key{font-family:'DM Mono',monospace;font-size:12px;font-weight:500;background:var(--border);color:var(--text2);padding:2px 7px;border-radius:4px;flex-shrink:0;margin-top:1px}
.mc-option.selected .mc-key{background:var(--accent);color:var(--bg)}
.answer-textarea{width:100%;min-height:160px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 18px;font-family:'Instrument Sans',sans-serif;font-size:15px;line-height:1.7;color:var(--text);resize:vertical;transition:border-color .2s;margin-top:16px}
.answer-textarea:focus{outline:none;border-color:var(--accent)}
.answer-textarea::placeholder{color:var(--text3)}
.word-count{font-size:12px;color:var(--text3);margin-top:6px;font-family:'DM Mono',monospace}
.audio-player{display:flex;align-items:center;gap:16px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 20px;margin:16px 0}
.play-btn{width:44px;height:44px;border-radius:50%;background:var(--accent);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:transform .15s,background .15s}
.play-btn:hover{transform:scale(1.06);background:var(--accent2)}
.play-btn:disabled{background:var(--border2);cursor:not-allowed;transform:none}
.play-btn svg{color:var(--bg)}
.audio-info{flex:1}
.audio-title{font-size:14px;font-weight:500;color:var(--text)}
.audio-sub{font-size:12px;color:var(--text2);margin-top:2px}
.listen-count{font-family:'DM Mono',monospace;font-size:12px;color:var(--text3)}
.mic-area{display:flex;flex-direction:column;align-items:center;padding:32px;gap:16px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);margin-top:16px}
.mic-btn{width:72px;height:72px;border-radius:50%;background:var(--surface);border:2px solid var(--border2);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}
.mic-btn.recording{background:rgba(232,93,58,.15);border-color:var(--danger);animation:mic-pulse 1.5s ease-in-out infinite}
@keyframes mic-pulse{0%,100%{box-shadow:0 0 0 0 rgba(232,93,58,.4)}50%{box-shadow:0 0 0 12px rgba(232,93,58,0)}}
.mic-label{font-size:13px;color:var(--text2)}
.rec-timer{font-family:'DM Mono',monospace;font-size:16px;font-weight:600;color:var(--accent);letter-spacing:.5px}
.transcript-box{width:100%;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;font-size:14px;line-height:1.6;color:var(--text2);min-height:60px;font-style:italic}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:var(--radius-sm);font-family:'Instrument Sans',sans-serif;font-size:14px;font-weight:500;cursor:pointer;border:none;transition:all .18s}
.btn-primary{background:var(--accent);color:var(--bg)}
.btn-primary:hover{background:var(--accent2);transform:translateY(-1px)}
.btn-primary:disabled{background:var(--border2);color:var(--text3);cursor:not-allowed;transform:none}
.btn-ghost{background:transparent;color:var(--text2);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--border2);color:var(--text)}
.btn-row{display:flex;gap:12px;margin-top:24px;justify-content:flex-end}
.loading{display:flex;align-items:center;gap:10px;color:var(--text2);font-size:14px;padding:16px 0}
.spinner{width:18px;height:18px;border-radius:50%;border:2px solid var(--border2);border-top-color:var(--accent);animation:spin .8s linear infinite;flex-shrink:0}
@keyframes spin{to{transform:rotate(360deg)}}
.feedback-box{background:var(--accent-dim2);border:1px solid rgba(200,245,90,.25);border-radius:var(--radius-sm);padding:20px 24px;margin-top:20px}
.feedback-box h4{font-size:13px;font-weight:600;letter-spacing:.8px;text-transform:uppercase;color:var(--accent);margin-bottom:10px}
.feedback-box p{font-size:14px;line-height:1.7;color:var(--text2)}
.result-screen{text-align:center;padding:40px 0}
.cefr-badge{display:inline-block;font-family:'DM Serif Display',serif;font-size:80px;line-height:1;color:var(--accent);margin-bottom:8px}
.cefr-name{font-size:18px;color:var(--text2);margin-bottom:32px}
.result-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:32px 0;text-align:left}
.result-cell{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 20px}
.result-cell-label{font-size:11px;text-transform:uppercase;letter-spacing:.8px;color:var(--text3);margin-bottom:6px}
.result-cell-value{font-size:20px;font-weight:600;color:var(--accent)}
.result-cell-sub{font-size:13px;color:var(--text2);margin-top:2px}
.overlay{position:fixed;inset:0;background:rgba(10,10,8,.95);z-index:1000;display:flex;align-items:center;justify-content:center;padding:24px}
.overlay-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:40px;max-width:460px;width:100%;text-align:center}
.overlay-icon{font-size:40px;margin-bottom:16px}
.overlay-card h2{font-family:'DM Serif Display',serif;font-size:24px;margin-bottom:12px}
.overlay-card p{font-size:14px;color:var(--text2);line-height:1.7;margin-bottom:24px}
.warn-count{font-family:'DM Mono',monospace;font-size:32px;color:var(--warn);margin:12px 0}
.intro-section{padding:40px 0}
.intro-section h1{font-family:'DM Serif Display',serif;font-size:48px;line-height:1.1;margin-bottom:16px}
.intro-section h1 em{font-style:italic;color:var(--accent)}
.intro-section>p{font-size:16px;line-height:1.7;color:var(--text2);max-width:560px;margin-bottom:36px}
.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:36px}
.info-cell{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px 20px}
.info-cell-label{font-size:11px;text-transform:uppercase;letter-spacing:.8px;color:var(--text3);margin-bottom:6px}
.info-cell-val{font-size:15px;font-weight:500;color:var(--text)}
.section-list{list-style:none;margin-bottom:32px}
.section-list li{display:flex;align-items:center;gap:14px;padding:12px 0;border-bottom:1px solid var(--border);font-size:14px;color:var(--text2)}
.section-list li:last-child{border-bottom:none}
.section-num{width:28px;height:28px;border-radius:50%;background:var(--surface2);border:1px solid var(--border2);display:flex;align-items:center;justify-content:center;font-family:'DM Mono',monospace;font-size:12px;color:var(--text3);flex-shrink:0}
.notice{background:rgba(245,166,35,.08);border:1px solid rgba(245,166,35,.25);border-radius:var(--radius-sm);padding:14px 18px;font-size:13px;color:var(--warn);margin-bottom:24px;line-height:1.6}
.section-header{margin-bottom:28px}
.section-tag{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:1px;text-transform:uppercase;color:var(--text3);margin-bottom:8px}
.section-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}
.section-header h2{font-family:'DM Serif Display',serif;font-size:28px;line-height:1.2;color:var(--text);margin-bottom:8px}
.section-header p{font-size:14px;color:var(--text2);line-height:1.6}
.gen-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 24px;text-align:center}
.gen-ring{width:56px;height:56px;border-radius:50%;border:3px solid var(--border2);border-top-color:var(--accent);animation:spin .9s linear infinite;margin-bottom:28px}
.gen-title{font-family:'DM Serif Display',serif;font-size:22px;color:var(--text);margin-bottom:8px}
.gen-sub{font-size:14px;color:var(--text2);margin-bottom:28px;line-height:1.6}
.gen-steps{display:flex;flex-direction:column;gap:10px;width:100%;max-width:320px}
.gen-step{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:var(--radius-sm);background:var(--surface2);border:1px solid var(--border);font-size:13px;color:var(--text3);transition:all .4s}
.gen-step.done{border-color:rgba(200,245,90,.3);color:var(--accent);background:var(--accent-dim)}
.gen-step.active{border-color:var(--border2);color:var(--text2)}
.gen-step-icon{width:18px;height:18px;flex-shrink:0}
.gen-step-icon.spin{border-radius:50%;border:2px solid var(--border2);border-top-color:var(--accent);animation:spin .7s linear infinite}
.hidden{display:none!important}
@media(max-width:600px){.info-grid,.result-grid{grid-template-columns:1fr}.intro-section h1{font-size:34px}}