:root{--bg: #f8fafc;--surface: #ffffff;--text: #0f172a;--text-secondary: #475569;--muted: #64748b;--faint: #94a3b8;--primary: #6d28d9;--primary-hover: #5b21b6;--primary-soft: #f5f3ff;--primary-border: #ddd6fe;--green: #047857;--green-bg: #d1fae5;--red: #b91c1c;--red-bg: #fee2e2;--amber: #92400e;--amber-bg: #fef3c7;--border: #e2e8f0;--border-strong: #cbd5e1;--radius: 12px;--radius-sm: 8px;--shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 1px 3px rgba(15, 23, 42, .06);--shadow-lg: 0 4px 6px -1px rgba(15, 23, 42, .05), 0 10px 15px -3px rgba(15, 23, 42, .08);--font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif}*{box-sizing:border-box}body{margin:0;font-family:var(--font);font-size:14px;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}#app{max-width:720px;margin:0 auto;padding:0 16px 48px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0;margin-bottom:20px;border-bottom:1px solid var(--border)}.topbar h1{font-size:17px;font-weight:700;letter-spacing:-.02em;margin:0;display:flex;align-items:center;gap:9px}.brand-mark{width:26px;height:26px;border-radius:7px;background:linear-gradient(135deg,var(--primary),#8b5cf6);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;flex:none}.home-link{color:inherit;text-decoration:none;display:flex;align-items:center;gap:9px}.chip{display:inline-flex;align-items:center;font-size:11px;font-weight:600;letter-spacing:.02em;padding:4px 10px;border-radius:6px;background:var(--primary-soft);color:var(--primary);border:1px solid var(--primary-border);white-space:nowrap}.chip-topic{background:#ecfdf5;color:#065f46;border-color:#a7f3d0}.chip-marks{background:var(--amber-bg);color:var(--amber);border-color:#fde68a}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.tagline{color:var(--muted);font-size:13px;margin:0 0 16px}.hint{margin-top:12px;color:var(--muted);font-size:13px;line-height:1.55}.section-title,.solution-title{font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);margin-bottom:10px}.progress{margin-bottom:18px}.progress-label{font-size:12px;font-weight:500;color:var(--muted);margin-bottom:7px}.progress-track{height:5px;background:var(--border);border-radius:999px;overflow:hidden}.progress-fill{height:100%;background:var(--primary);border-radius:999px;transition:width .3s ease}.question-text{font-size:15px;line-height:1.65;overflow-x:auto;color:var(--text)}.question-text p{margin:0 0 8px}.options{display:flex;flex-direction:column;gap:8px;margin-top:18px}.option{display:flex;align-items:center;gap:12px;width:100%;text-align:left;padding:13px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);font:inherit;font-size:14px;color:var(--text);cursor:pointer;transition:border-color .12s,background .12s,box-shadow .12s}.option:hover:not(:disabled){border-color:var(--border-strong);background:#fcfcfd}.option.selected{border-color:var(--primary);background:var(--primary-soft);box-shadow:0 0 0 1px var(--primary)}.option.correct{border-color:#34d399;background:#f0fdf9}.option.incorrect{border-color:#f87171;background:#fef5f5}.option:disabled{cursor:default;opacity:1;color:inherit}.option-letter{flex:none;width:26px;height:26px;display:grid;place-items:center;border-radius:6px;background:var(--bg);border:1px solid var(--border);font-weight:600;font-size:12px;color:var(--text-secondary)}.option.selected .option-letter{background:var(--primary);border-color:var(--primary);color:#fff}.numeric-input{width:100%;margin-top:12px;padding:10px 12px;font:inherit;font-size:14px;color:var(--text);border:1px solid var(--border-strong);border-radius:var(--radius-sm);outline:none;background:var(--surface);transition:border-color .12s,box-shadow .12s}.numeric-input::placeholder{color:var(--faint)}.numeric-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #6d28d91f}.numeric-input.correct{border-color:#34d399;background:#f0fdf9}.numeric-input.incorrect{border-color:#f87171;background:#fef5f5}.actions{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}.btn{flex:1;min-width:130px;padding:10px 18px;font:inherit;font-size:14px;font-weight:600;border:1px solid transparent;border-radius:var(--radius-sm);cursor:pointer;transition:background .12s,border-color .12s,box-shadow .12s}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-success{background:#059669;color:#fff}.btn-success:hover:not(:disabled){background:#047857}.btn-danger{background:#dc2626;color:#fff}.btn-danger:hover:not(:disabled){background:#b91c1c}.btn-ghost{background:var(--surface);color:var(--text-secondary);border-color:var(--border-strong)}.btn-ghost:hover:not(:disabled){background:var(--bg);color:var(--text)}.btn-link{background:none;border:none;color:var(--primary);font:inherit;font-size:13px;font-weight:600;cursor:pointer;padding:6px 8px;border-radius:6px}.btn-link:hover{background:var(--primary-soft)}.verdict{margin-top:18px;padding:10px 14px;border-radius:var(--radius-sm);font-weight:600;font-size:14px}.verdict-correct{background:var(--green-bg);color:var(--green)}.verdict-incorrect{background:var(--red-bg);color:var(--red)}.solution{margin-top:14px;padding:16px;border-radius:var(--radius-sm);background:var(--bg);border:1px solid var(--border);line-height:1.65;font-size:14px;overflow-x:auto}.solution p{margin:0 0 10px}.solution p:last-child{margin-bottom:0}.score-card{text-align:center}.score-big{font-size:40px;font-weight:800;letter-spacing:-.03em;color:var(--text)}.score-big-small{font-size:22px}.score-pct{font-size:15px;font-weight:600;color:var(--primary);margin-top:2px}.score-message{margin:12px 0 20px;color:var(--text-secondary)}.score-breakdown{list-style:none;padding:0;margin:0 0 20px;text-align:left}.score-breakdown li{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:11px 4px;border-bottom:1px solid var(--border);font-size:13.5px}.score-breakdown li:last-child{border-bottom:none}.row-correct{color:var(--green)}.row-incorrect{color:var(--red)}.test-list{display:flex;flex-direction:column;gap:10px}.test-card{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;text-align:left;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;cursor:pointer;font:inherit;color:var(--text);box-shadow:var(--shadow);transition:border-color .12s,box-shadow .12s}.test-card:hover{border-color:var(--border-strong);box-shadow:var(--shadow-lg)}.test-card-title{font-weight:600;font-size:14.5px;margin-bottom:3px;display:flex;align-items:center;gap:7px}.test-card-sub{font-size:12.5px;color:var(--muted)}.icon{width:15px;height:15px;flex:none;color:var(--faint);vertical-align:-2px}.test-card-row{display:flex;align-items:center;gap:12px;min-width:0}.nav-icon{flex:none;width:36px;height:36px;border-radius:8px;background:var(--primary-soft);display:grid;place-items:center}.nav-icon .icon{width:17px;height:17px;color:var(--primary)}.status-chip{flex:none;font-size:10.5px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;padding:4px 9px;border-radius:5px;white-space:nowrap}.status-new{background:#f1f5f9;color:var(--muted)}.status-progress{background:var(--amber-bg);color:var(--amber)}.status-done{background:var(--green-bg);color:var(--green)}.status-wrong{background:var(--red-bg);color:var(--red)}.landing-title{margin:10px 0 4px;font-size:20px;font-weight:700;letter-spacing:-.02em}.landing-teacher{color:var(--muted);margin:0 0 8px;font-size:13px}.landing-facts{list-style:none;padding:0;margin:16px 0 4px}.landing-facts li{padding:9px 0;border-bottom:1px solid var(--border);font-size:13.5px;color:var(--text-secondary)}.landing-facts li:last-child{border-bottom:none}.google-btn-slot{margin:16px 0 6px;min-height:44px}.login-error{color:var(--red);font-size:13px;margin:10px 0 0}.profile-row{display:flex;align-items:center;gap:12px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px 16px;margin-bottom:14px;box-shadow:var(--shadow)}.profile-pic{width:34px;height:34px;border-radius:50%;flex:none}.profile-main{min-width:0;flex:1}.profile-name{font-weight:600;font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.profile-sub{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.server-results{margin-top:14px}.welcome{text-align:center;padding:40px 28px 28px;max-width:420px;margin:24px auto 0}.welcome-logo{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--primary),#8b5cf6);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:26px;font-weight:800;margin-bottom:14px;box-shadow:var(--shadow-lg)}.welcome-title{font-size:21px;font-weight:700;letter-spacing:-.02em;margin:0 0 8px}.welcome-sub{color:var(--muted);font-size:13.5px;line-height:1.6;margin:0 0 18px}.welcome .google-btn-slot{display:flex;justify-content:center}.welcome-divider{display:flex;align-items:center;gap:12px;color:var(--faint);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;margin:18px 0}.welcome-divider:before,.welcome-divider:after{content:"";flex:1;height:1px;background:var(--border)}.welcome .btn-ghost,.welcome .btn-primary{width:100%}.welcome-note{margin-top:14px;font-size:12px}.admin-link-row{margin:20px 0 0}.admin-link-row .btn-link{color:var(--faint);font-weight:500;font-size:12px}.teacher-entry{margin-bottom:10px}.roster-card{margin-top:14px}.roster-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px solid var(--border)}.roster-row:last-child{border-bottom:none}.roster-main{min-width:0}.roster-name{font-weight:600;font-size:13.5px}.roster-sub{font-size:12px;color:var(--muted);margin-top:1px}.roster-actions{display:flex;gap:2px;flex:none}.cred-card{margin-top:16px;padding:16px;border-radius:var(--radius-sm);background:#f0fdf9;border:1px solid #a7f3d0}.cred-title{font-weight:600;font-size:13px;margin-bottom:8px;color:#065f46}.cred-line{font-size:13.5px;margin-bottom:4px;color:var(--text)}.cred-line strong{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;background:#fff;border:1px solid #a7f3d0;border-radius:4px;padding:1px 6px}.cred-copy{margin-top:12px;width:100%}.report-stats{display:flex;gap:10px;margin-top:16px}.report-stat{flex:1;text-align:center;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 6px}.report-stat-num{font-size:20px;font-weight:800;letter-spacing:-.02em;color:var(--text)}.report-stat-label{font-size:10.5px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--faint);margin-top:3px}.review-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.review-header .landing-title{margin:0;font-size:16px}.review-item{margin-bottom:12px}.review-given{margin:10px 0 0;font-size:13px;color:var(--muted)}@media (min-width: 480px){#app{padding:0 24px 48px}.card{padding:28px}.btn{flex:0 0 auto}}.console{display:flex;flex-direction:column;gap:16px}.console-nav{display:flex;gap:4px;overflow-x:auto;padding-bottom:2px}.console-nav-title{display:none}.console-link{display:flex;align-items:center;gap:9px;padding:8px 12px;border:none;border-radius:var(--radius-sm);background:none;font:inherit;font-size:13.5px;font-weight:500;color:var(--text-secondary);cursor:pointer;white-space:nowrap;transition:background .12s,color .12s}.console-link .icon{width:16px;height:16px;color:var(--faint)}.console-link:hover{background:#f1f5f9;color:var(--text)}.console-link.active{background:var(--primary-soft);color:var(--primary);font-weight:600}.console-link.active .icon{color:var(--primary)}.console-main{min-width:0;flex:1;display:flex;flex-direction:column;gap:14px}.console-main .roster-card{margin-top:0}@media (min-width: 900px){#app:has(.console){max-width:1080px}.console{flex-direction:row;align-items:flex-start;gap:28px}.console-nav{flex:0 0 220px;flex-direction:column;gap:2px;overflow:visible;position:sticky;top:16px}.console-nav-title{display:block;font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);padding:0 12px 8px}.console-link{width:100%;text-align:left}}.table-wrap{overflow-x:auto;margin:0 -8px;padding:0 8px}.data-table{width:100%;border-collapse:collapse;font-size:13.5px}.data-table th{text-align:left;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--faint);padding:8px 12px 8px 4px;border-bottom:1px solid var(--border);white-space:nowrap}.data-table td{padding:11px 12px 11px 4px;border-bottom:1px solid var(--border);color:var(--text-secondary);white-space:nowrap;vertical-align:middle}.data-table tbody tr:last-child td{border-bottom:none}.data-table tbody tr:hover td{background:#fafbfc}.cell-strong{font-weight:600;color:var(--text)!important}.cell-mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px}.cell-actions{text-align:right}