:root{--bg:#f6f1e8;--surface:#fffaf2;--ink:#1f2937;--muted:#5b6472;--primary:#14532d;--accent:#ea580c;--border:#e8dccb;--shadow:0 18px 40px #31221114}*{box-sizing:border-box}html{font-size:16px}body{background:radial-gradient(circle at top left, #ffd69959, transparent 28%), linear-gradient(180deg, #fff7ed 0%, var(--bg) 100%);color:var(--ink);margin:0;font-family:Georgia,Times New Roman,serif}a{color:inherit;text-decoration:none}.shell{max-width:1360px;margin:0 auto;padding:20px 20px 56px}.shell-layout{grid-template-columns:248px minmax(0,1fr);align-items:start;gap:24px;display:grid}.sidebar{border:1px solid var(--border);box-shadow:var(--shadow);background:#fffaf2eb;border-radius:28px;gap:18px;padding:20px 18px;display:grid;position:sticky;top:18px}.sidebar-brand{gap:8px;display:grid}.sidebar-sections{gap:18px;display:grid}.sidebar-section{gap:10px;display:grid}.content-column{min-width:0}.topbar{justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:24px;padding:0 4px;display:flex}.topbar h1,.sidebar h1,.topbar h2,.hero h2,.card h2,.card h3,.card h4{margin:0}.nav{flex-wrap:wrap;gap:12px;display:flex}.nav-sidebar{gap:10px;display:grid}.nav a,.nav-button,.button,.text-link{transition:transform .16s,opacity .16s}.nav a:hover,.nav-button:hover,.button:hover,.text-link:hover{transform:translateY(-1px)}.nav a,.nav-button{border:1px solid var(--border);font:inherit;cursor:pointer;background:#ffffffb3;border-radius:16px;padding:10px 14px}.nav-sidebar a,.nav-sidebar .nav-button{text-align:left;justify-content:flex-start;width:100%}.nav-sidebar .nav-active{color:var(--primary);background:linear-gradient(#ecfdf5fa,#fff);border-color:#14532d47;font-weight:700}.sidebar-logout{width:100%;margin-top:4px}.stack-lg{gap:24px;display:grid}.stack-md{gap:16px;display:grid}.hero,.card,.hero-card,.mini-panel,.lesson-tile{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:24px}.hero{grid-template-columns:1.6fr 1fr;gap:24px;padding:28px;display:grid}.hero-card,.card,.mini-panel,.lesson-tile{padding:22px}.hero-copy,.helper-text,.card p,.lesson-tile p,.mini-panel p{color:var(--muted);line-height:1.6}.eyebrow{color:var(--accent);letter-spacing:.08em;text-transform:uppercase;margin:0 0 8px;font-size:.8rem;font-weight:700}.actions{flex-wrap:wrap;gap:12px;margin-top:20px;display:flex}.compact-actions{margin-top:0}.button{border-radius:14px;justify-content:center;align-items:center;padding:12px 18px;font-weight:700;display:inline-flex}.auth-wrap{justify-content:center;padding:40px 0;display:flex}.auth-card{background:var(--surface);border:1px solid var(--border);width:min(100%,520px);box-shadow:var(--shadow);border-radius:24px;padding:28px}.auth-form{gap:16px;margin-top:20px;display:grid}.auth-form label{gap:8px;font-weight:700;display:grid}.auth-form input{border:1px solid var(--border);width:100%;font:inherit;background:#fff;border-radius:14px;padding:12px 14px}.speaking-textarea{border:1px solid var(--border);width:100%;min-height:220px;font:inherit;resize:vertical;background:#fff;border-radius:16px;margin-top:16px;padding:14px 16px;line-height:1.6}.assignment-form{gap:16px;display:grid}.assignment-form label{gap:8px;font-weight:700;display:grid}.assignment-form input,.assignment-form select,.assignment-form textarea,.task-admin-row select,.filter-bar select,.edit-card input,.edit-card select,.edit-card textarea{border:1px solid var(--border);width:100%;font:inherit;background:#fff;border-radius:14px;padding:12px 14px}.error-text{color:#b91c1c;margin:0;font-weight:700}.practice-form{gap:18px;display:grid}.question-card,.result-card{border:1px solid var(--border);background:#fff;border-radius:18px;margin:0;padding:18px}.question-card legend{padding:0 8px 0 0;font-weight:700}.option-list{gap:10px;margin-top:12px;display:grid}.option-item{border:1px solid var(--border);background:#fffaf2;border-radius:14px;align-items:center;gap:10px;padding:10px 12px;display:flex}.task-admin-row{border:1px solid var(--border);background:#fff;border-radius:16px;gap:12px;padding:14px;display:grid}.filter-bar,.edit-card{gap:14px;display:grid}.filter-bar{grid-template-columns:repeat(3,minmax(0,1fr));margin-bottom:18px}.filter-bar label,.edit-card label{gap:8px;font-weight:700;display:grid}.task-admin-row h4,.result-card h4{margin:0}.danger{color:#b91c1c;border-color:#fecaca}.success-text{color:#166534;margin:0;font-weight:700}.success-banner{background:linear-gradient(135deg,#dcfce7f5,#fffbebfa);border-color:#1665342e}.primary{background:var(--primary);color:#fff}.secondary{border:1px solid var(--border);background:#fff}.text-link{color:var(--primary);font-weight:700}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;display:grid}.section-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;display:flex}.plain-list,.task-list{margin:0;padding:0;list-style:none}.numbered-list{padding-left:20px;list-style:decimal}.plain-list li,.task-list li,.numbered-list li{border-top:1px dashed var(--border);padding:10px 0}.plain-list li:first-child,.task-list li:first-child{border-top:0}.task-list li{justify-content:space-between;align-items:center;gap:16px;display:flex}.pill-row,.stats{flex-wrap:wrap;gap:12px;display:flex}.pill{background:#e5e7eb;border-radius:999px;align-items:center;padding:8px 12px;font-size:.85rem;font-weight:700;display:inline-flex}.pill.ready{color:#9a3412;background:#ffedd5}.pill.in_progress{color:#1d4ed8;background:#dbeafe}.pill.done,.pill.muted{color:#166534;background:#dcfce7}.accent{background:linear-gradient(135deg,#d9f99db3,#fff7edf2)}.learning-hero{grid-template-columns:1.4fr .9fr;gap:20px;display:grid}.hero-main,.hero-side{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:28px;padding:26px}.hero-main{background:radial-gradient(circle at 100% 0,#d9f99d73,#0000 35%),linear-gradient(135deg,#fff7edf2,#ecfdf5f2)}.hero-side{background:linear-gradient(#fffffffa,#fffaf2fa)}.compact-hero .hero-main,.compact-hero .hero-side{padding:20px 22px}.compact-panel .actions{margin-top:8px}.metric-strip{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:20px;display:grid}.metric-card{background:#ffffffb8;border:1px solid #14532d14;border-radius:18px;padding:14px 16px}.metric-value{font-size:1.7rem;font-weight:700;display:block}.metric-label{color:var(--muted);font-size:.95rem}.task-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.task-tile{border:1px solid var(--border);box-shadow:var(--shadow);background:linear-gradient(#fffdf8 0%,#fff 100%);border-radius:20px;padding:18px}.task-tile.compact{box-shadow:none;border-radius:18px}.task-tile.ready{border-color:#fde68a}.task-tile.done{border-color:#86efac}.task-tile-top,.score-row,.result-banner{justify-content:space-between;align-items:center;gap:12px;display:flex}.task-order{letter-spacing:.08em;text-transform:uppercase;color:var(--accent);font-size:.8rem;font-weight:700}.score-chip{color:var(--primary);background:#eefbf3;border-radius:999px;align-items:center;padding:8px 12px;font-size:.85rem;font-weight:700;display:inline-flex}.compact-card{padding:18px 22px}.spotlight-card{border-width:2px;border-color:#14532d29}.practice-main-grid{grid-template-columns:minmax(0,1.2fr) 320px;align-items:start;gap:18px;display:grid}.practice-side-rail{gap:16px;display:grid;position:sticky;top:18px}.spotlight-question{background:linear-gradient(#fffbebf2,#fff)}.result-banner{margin-bottom:18px}.explanation-stack{border-top:1px dashed var(--border);margin-top:10px;padding-top:8px}.prep-banner{background:linear-gradient(135deg,#fff8dcfa,#f0fdf4fa)}.study-prep{margin-bottom:18px}.flashcard-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.flashcard{text-align:left;border:1px solid var(--border);width:100%;box-shadow:var(--shadow);font:inherit;cursor:pointer;background:linear-gradient(#fffdf7 0%,#fff 100%);border-radius:20px;gap:10px;padding:18px;display:grid}.flashcard.single{align-content:center;min-height:220px}.flashcard-stage{gap:16px;display:grid}.flashcard-label{color:var(--accent);letter-spacing:.08em;text-transform:uppercase;font-size:.8rem;font-weight:700}.listening-layout{grid-template-columns:.9fr 1.3fr;gap:18px;display:grid}.listening-sidebar{gap:12px;display:grid}.listening-track{text-align:left;border:1px solid var(--border);width:100%;font:inherit;cursor:pointer;background:#fff;border-radius:18px;gap:8px;padding:16px;display:grid}.listening-track.active{background:linear-gradient(#ecfdf5f2,#fff);border-color:#14532d47}.listening-stage{border:1px solid var(--border);background:linear-gradient(#fffefb 0%,#fff 100%);border-radius:20px;padding:18px}.speed-row{flex-wrap:wrap;gap:10px;margin:16px 0;display:flex}.speed-chip{border:1px solid var(--border);font:inherit;cursor:pointer;background:#fff;border-radius:999px;padding:8px 12px}.speed-chip.active{color:var(--primary);background:#eefbf3;border-color:#14532d47;font-weight:700}.reading-stage{background:linear-gradient(#fffbebeb,#fff)}.reading-preview{grid-template-columns:1.15fr .85fr;gap:16px;display:grid}.reading-clue-box,.retry-drill{border:1px solid var(--border);background:#ffffffe6;border-radius:18px;padding:16px}.clue-list li{padding:6px 0}.secondary-panel{background:linear-gradient(#eff6fff5,#fff)}.grammar-lab{background:linear-gradient(#f0fdf4eb,#fff)}.grammar-step{border:1px solid var(--border);background:#fff;border-radius:18px;padding:16px}.retry-drill{margin-top:16px}.retry-feedback{border-top:1px dashed var(--border);margin-top:14px;padding-top:12px}.selected-option{background:#eefbf3;border-color:#14532d47}.success-chip{color:#166534;background:#dcfce7}.warning-chip{color:#9a3412;background:#ffedd5}.trend-list{gap:12px;margin-top:18px;display:grid}.trend-row{gap:8px;display:grid}.trend-head{justify-content:space-between;align-items:center;gap:12px;display:flex}.trend-bar{background:#f3eadc;border-radius:999px;width:100%;height:12px;overflow:hidden}.trend-bar span{border-radius:inherit;background:linear-gradient(90deg,#f59e0b 0%,#15803d 100%);height:100%;display:block}.trend-bar.soft span{background:linear-gradient(90deg,#f97316 0%,#16a34a 100%)}.audio-progress-card{border:1px solid var(--border);background:#ffffffe0;border-radius:18px;margin:16px 0 8px;padding:14px 16px}.focus-exam-shell{gap:1rem;display:grid}.focus-header{justify-content:space-between;align-items:center;gap:1rem;display:flex}.focus-progress{min-height:.75rem}.focus-question-card{border:1px solid var(--border);background:#fffdfaf5;border-radius:22px;gap:1rem;padding:1.5rem;display:grid}.focus-question-card h2{margin:0;font-size:clamp(1.3rem,2vw,1.9rem);line-height:1.55}.focus-option-list{gap:.9rem}.focus-option{border:1px solid var(--border);text-align:left;cursor:pointer;width:100%;color:inherit;font:inherit;background:#fff;border-radius:18px;align-items:center;gap:.85rem;padding:.95rem 1rem;display:flex}.focus-option.active{border-color:var(--green-strong);background:#e3f7e9e0;box-shadow:0 0 0 2px #266d3b14}.focus-footer{gap:.75rem;display:grid}.focus-nav{flex-wrap:wrap;gap:.75rem;display:flex}.placement-listening-grid{grid-template-columns:minmax(320px,.95fr) minmax(0,1.05fr);gap:18px;display:grid}.question-audio-grid{grid-template-columns:minmax(320px,.95fr) minmax(0,1.05fr);align-items:start;gap:18px;display:grid}.quest-map{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.quest-node{border:1px solid var(--border);box-shadow:var(--shadow);background:linear-gradient(#fffaf2fa,#fff);border-radius:22px;gap:12px;padding:20px;display:grid;position:relative}.quest-node:after{content:"";background:linear-gradient(90deg,#f9731640,#16a34a40);border-radius:999px;width:48px;height:6px;position:absolute;inset:auto 24px -10px auto}.quest-note{color:#9a3412;margin:0;font-weight:700}.star-row{align-items:center;gap:8px;display:flex}.star-token{color:#d6d3d1;font-size:1.1rem}.star-token.filled{color:#f59e0b;text-shadow:0 2px 6px #f59e0b33}.revive-card{position:relative}.revive-badge{color:#9a3412;background:#ffedd5;border-radius:999px;justify-content:center;align-items:center;width:fit-content;padding:6px 10px;font-size:.75rem;font-weight:700;display:inline-flex}.reward-grid,.collection-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.reward-badge,.collection-card{border:1px solid var(--border);background:linear-gradient(#fffbebf0,#fff);border-radius:18px;gap:8px;padding:16px;display:grid}.compact-rewards{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:12px}.reward-mark{color:#f59e0b;font-weight:700}.collection-card{opacity:.6}.collection-card.unlocked{opacity:1;background:linear-gradient(#ecfdf5f5,#fff);border-color:#14532d38}.sticky-audio-panel{align-self:start;position:sticky;top:18px}.quiz-header-slot{margin:18px 0 20px}.audio-progress{margin-top:8px}.stat-value{font-size:1.8rem;font-weight:700;display:block}.stat-label{color:var(--muted)}@media (max-width:800px){.shell-layout{grid-template-columns:1fr}.sidebar{position:static}.topbar,.section-head{flex-direction:column;align-items:stretch}.hero,.grid.two,.learning-hero,.task-grid,.quest-map,.metric-strip,.flashcard-grid,.reward-grid,.collection-grid,.listening-layout,.reading-preview,.placement-listening-grid,.question-audio-grid,.practice-main-grid{grid-template-columns:1fr}.sticky-audio-panel{position:static}.hero{padding:22px}}