:root{color-scheme:light;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#111827;background:#f3f6f9;--accent: #173a6a;--accent-dark: #0f2e5d;--ink: #111827;--muted: #536985;--line: #d5dee9;--soft: #eef4fb;--danger: #a23a3a;--card: #ffffff;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}h1,h2,h3,p{margin:0}h1{font-size:clamp(2rem,4vw,4rem);line-height:1.02;letter-spacing:0}h2{font-size:1.15rem;line-height:1.2;letter-spacing:0}h3{font-size:1rem;letter-spacing:0}img{display:block;max-width:100%}.app-shell{width:min(1120px,calc(100% - 32px));margin:0 auto;padding:32px 0 56px}.app-shell.narrow{width:min(760px,calc(100% - 32px))}.topbar{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;margin-bottom:24px}.topbar.compact{align-items:center;justify-content:flex-start}.eyebrow{color:var(--accent-dark);font-size:.76rem;font-weight:700;letter-spacing:0;text-transform:uppercase;margin-bottom:8px}.intro-band,.calm-panel,.selector-panel,.feedback-summary,.feedback-table-wrap,.known-limitations,.error-panel{background:var(--card);border:1px solid var(--line);border-radius:8px;box-shadow:0 18px 40px #1420220f}.intro-band{padding:24px;display:grid;gap:18px;margin-bottom:24px}.intro-copy{display:flex;gap:14px;align-items:flex-start;color:#263638;font-size:1.05rem;line-height:1.55;max-width:920px}.disclaimer,.muted{color:var(--muted);line-height:1.5}.calm-panel,.selector-panel,.error-panel{padding:24px}.panel-heading{display:flex;align-items:center;gap:12px;margin-bottom:18px}.actions-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:24px}.compact-actions{margin-top:0}.primary-button,.secondary-button,.danger-button,.ghost-button,.icon-button{min-height:42px;border-radius:8px;border:1px solid transparent;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0 14px;font-weight:700}.primary-button{background:var(--accent);color:#fff}.primary-button:hover{background:var(--accent-dark)}.secondary-button,.icon-button{background:#fff;border-color:var(--line);color:var(--ink)}.secondary-button:hover,.icon-button:hover{border-color:#b7c7c4;background:#fbfdfc}.danger-button{background:#fff5f5;color:var(--danger);border-color:#efc4c4}.ghost-button{background:transparent;color:var(--muted);border-color:transparent}.text-button{padding-inline:12px}.status-line{color:var(--muted);margin-top:16px}.student-home{width:min(1320px,calc(100% - 32px));margin:0 auto;padding:44px 0 36px}.hero-panel{min-height:56vh;display:grid;justify-items:center;align-content:center;text-align:center;gap:22px}.hero-pill{display:inline-flex;align-items:center;gap:9px;min-height:38px;padding:0 18px;border:1px solid var(--line);border-radius:999px;background:#ffffffdb;color:var(--accent);font-weight:700;box-shadow:0 10px 24px #1224400f}.hero-panel h1{max-width:860px;font-size:clamp(3.4rem,6.6vw,6.2rem);line-height:.98;font-weight:900;letter-spacing:0}.hero-panel h1 span{color:#23549b}.hero-subtitle{width:min(780px,100%);color:var(--muted);font-size:clamp(1.06rem,2vw,1.42rem);line-height:1.48}.hero-feature-grid{width:min(760px,100%);display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:22px}.hero-feature-grid article{min-height:138px;padding:22px 20px;background:#ffffffeb;border:1px solid var(--line);border-radius:14px;text-align:left;display:grid;align-content:end;gap:8px;box-shadow:0 14px 30px #1224400d}.hero-feature-grid svg{color:var(--accent);padding:8px;width:42px;height:42px;background:#edf3fa;border-radius:14px}.hero-feature-grid strong{font-size:1.02rem}.hero-feature-grid span{color:var(--muted)}.choose-level{margin:20px 0 28px;text-align:center;color:var(--muted);text-transform:uppercase;font-weight:800;letter-spacing:.08em}.home-disclaimer{width:min(920px,100%);margin:22px auto 0;color:var(--muted);text-align:center;line-height:1.45;font-size:.92rem}@media(max-width:720px){.student-home{width:min(100% - 22px,560px);padding:26px 0 28px}.hero-panel{min-height:auto;padding-top:10px;gap:18px}.hero-panel h1{font-size:clamp(2.55rem,13vw,4rem)}.hero-feature-grid{grid-template-columns:1fr;gap:10px;margin-top:8px}.hero-feature-grid article{min-height:96px;grid-template-columns:48px 1fr;align-items:center;align-content:center}.hero-feature-grid article span,.hero-feature-grid article strong{grid-column:2}.hero-feature-grid svg{grid-row:1 / span 2}.topbar{flex-direction:column}.topbar.compact{flex-direction:row;align-items:flex-start}.actions-row,.primary-button,.secondary-button,.danger-button,.ghost-button{width:100%}}.exam-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:20px}.exam-card,.part-card{background:#fff;border:1px solid var(--line);border-radius:14px;color:var(--ink);text-align:left;padding:24px;display:flex;flex-direction:column;gap:12px;min-height:250px;transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease}.exam-card{border-top:5px solid #557aa9}.exam-card:hover,.part-card:hover,.part-card.selected{border-color:#aebfd5;box-shadow:0 18px 36px #1224401a;transform:translateY(-1px)}.level-badge{width:fit-content;padding:4px 8px;border-radius:999px;color:var(--accent-dark);background:var(--soft);font-weight:800;font-size:.78rem}.exam-title,.part-title{font-size:1.2rem;font-weight:800}.exam-level{color:#0f376f;font-size:2.2rem;font-weight:900;line-height:1}.exam-meta,.part-meta,.part-task{color:var(--muted);line-height:1.45}.exam-duration{color:var(--muted);margin-top:8px}.exam-start-button{width:100%;min-height:50px;margin-top:auto;border:0;border-radius:10px;background:var(--accent);color:#fff;font-weight:850}.exam-start-button:hover{background:var(--accent-dark)}.exam-flags,.part-flags{display:grid;gap:8px;color:#314244;margin-top:auto}.exam-flags span,.part-flags span,.card-action{display:inline-flex;gap:7px;align-items:center}.card-action{color:var(--accent-dark);font-weight:800}.segmented-control{display:flex;flex-wrap:wrap;gap:8px;padding:4px;border:1px solid var(--line);border-radius:8px;width:fit-content;margin-bottom:18px;background:#f9fbfa}.segmented-control button{border:0;border-radius:6px;background:transparent;padding:10px 14px;color:var(--muted);font-weight:800}.segmented-control button.active{background:#fff;color:var(--accent-dark);box-shadow:0 6px 14px #14202214}.part-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.part-card{min-height:250px}@media(max-width:1080px){.exam-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:720px){.exam-grid,.part-grid{grid-template-columns:1fr}.exam-card,.part-card{min-height:auto}.exam-card{padding:20px}.segmented-control,.segmented-control button{width:100%}}.practice-shell{width:min(1120px,calc(100% - 32px));margin:0 auto;min-height:100vh;display:grid;grid-template-rows:auto auto auto 1fr;gap:16px;padding:24px 0}.practice-header{display:flex;justify-content:space-between;gap:18px;align-items:flex-start}.timer-box{min-width:112px;padding:13px 16px;border-radius:8px;border:1px solid var(--line);background:#fff;text-align:center;font-size:1.45rem;font-weight:900;font-variant-numeric:tabular-nums}.conversation-stage{position:relative;min-height:360px;border:1px solid var(--line);border-radius:22px;background:radial-gradient(circle at 50% 40%,rgba(35,84,155,.09),transparent 32%),#fff;display:grid;place-items:center;text-align:center;padding:32px 20px;overflow:hidden;box-shadow:0 24px 60px #12244014}.part-chip{position:absolute;top:18px;left:18px;min-height:36px;padding:0 14px;display:inline-flex;align-items:center;border-radius:999px;background:#edf3fa;color:var(--accent);font-weight:900;letter-spacing:.08em}.voice-orb{position:relative;width:178px;height:178px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(145deg,#1c4f91,#102d5c);box-shadow:0 24px 70px #173a6a42,inset 0 -12px 32px #0000002e}.voice-orb span{position:absolute;border-radius:50%;background:#ffffff6b}.voice-orb span:nth-child(1){width:80px;height:80px}.voice-orb span:nth-child(2){width:118px;height:118px;opacity:.25}.voice-orb span:nth-child(3){width:34px;height:34px;background:#fff}.voice-orb.examiner,.voice-orb.learner,.voice-orb.connecting,.voice-orb.finishing{animation:orb-pulse 1.5s ease-in-out infinite}.voice-orb.learner{background:linear-gradient(145deg,#0f766e,#0f4e4a)}.voice-orb.connecting,.voice-orb.finishing{background:linear-gradient(145deg,#335f9e,#173a6a)}.voice-orb.learner span:nth-child(2){transform:scale(calc(.82 + var(--mic-level, .12) * .42));opacity:calc(.18 + var(--mic-level, .12) * .28)}.conversation-copy{display:grid;gap:8px;max-width:600px}.conversation-copy h2{font-size:clamp(1.7rem,4vw,2.7rem);font-weight:900}.conversation-copy p{color:var(--muted);font-size:1.05rem;line-height:1.5}.conversation-status{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:4px}.conversation-status span{min-height:32px;display:inline-flex;align-items:center;padding:0 12px;border-radius:999px;background:#f4f7fb;color:#445a76;font-weight:700;font-size:.88rem}.visual-area{min-height:440px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:20px;display:grid;gap:18px;align-content:start}.visual-area.empty{place-items:center;color:var(--muted)}.visual-images{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;align-items:stretch}.visual-images img{width:100%;height:100%;min-height:260px;object-fit:cover;border:1px solid var(--line);border-radius:8px;background:#eef4f2}.visual-missing{border:1px dashed #b6c8c4;border-radius:8px;min-height:220px;display:grid;place-items:center;color:var(--muted);text-align:center;padding:16px}.prompt-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px}.prompt-list span{border:1px solid var(--line);border-radius:8px;padding:14px;background:#fbfdfc;font-weight:800;text-align:center}.caption-panel{border:1px solid var(--line);background:#fbfdfc;color:#2e4243;border-radius:8px;padding:12px 14px}.practice-controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:8px;background:#fff}.practice-controls.simplified{justify-content:center;border-radius:16px}@keyframes orb-pulse{0%,to{transform:scale(1)}50%{transform:scale(1.045)}}.meter-shell{height:18px;border-radius:999px;background:#edf4f2;border:1px solid var(--line);overflow:hidden}.meter-shell span{display:block;height:100%;min-width:2px;background:var(--accent);transition:width .12s ease}@media(max-width:760px){.practice-shell{width:min(100% - 20px,560px);gap:12px;padding:16px 0 24px}.practice-header{flex-direction:row;align-items:flex-start}.practice-header h1{font-size:1.65rem}.timer-box{min-width:88px;font-size:1.1rem;padding:10px 12px}.conversation-stage{min-height:330px;padding:60px 16px 26px}.voice-orb{width:138px;height:138px}.voice-orb span:nth-child(1){width:62px;height:62px}.voice-orb span:nth-child(2){width:92px;height:92px}.visual-area{min-height:0;padding:14px}.visual-images{grid-template-columns:1fr}.visual-images img{min-height:210px}.practice-controls button{width:100%}}.feedback-notice{border:1px solid #c9ddd8;background:#eef7f5;color:#164b47;border-radius:8px;padding:14px 16px;font-weight:800;margin-bottom:16px}.feedback-summary,.feedback-table-wrap{padding:20px;margin-bottom:16px;display:grid;gap:10px}.feedback-table{width:100%;border-collapse:collapse;font-size:.95rem}.feedback-table th,.feedback-table td{border-bottom:1px solid var(--line);text-align:left;padding:12px 10px;vertical-align:top}.feedback-table th{color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:0}.feedback-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.feedback-grid>div{display:grid;gap:12px;align-content:start}.feedback-item{border:1px solid var(--line);background:#fff;border-radius:8px;padding:16px;display:grid;gap:8px}.practice-plan{margin:0;padding-left:20px;display:grid;gap:8px;color:#314244}@media(max-width:760px){.feedback-grid{grid-template-columns:1fr}.feedback-table-wrap{overflow-x:auto}}