:root{
  --bg:#f4fbf9;--panel:#ffffff;--ink:#16302d;--muted:#667b78;--line:#d9e8e5;
  --brand:#0f766e;--brand2:#0d9488;--accent:#f59e0b;--ok:#15803d;--bad:#b91c1c;
  --warn:#b45309;--shadow:0 14px 40px rgba(15,118,110,.10);--radius:18px;
}
*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:linear-gradient(180deg,#ecfdf5 0,#f8fafc 45%,#f4fbf9 100%);color:var(--ink)}
button,input,select,textarea{font:inherit}.shell{min-height:100vh}.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.topbar-inner{max-width:1220px;margin:auto;padding:12px 18px;display:flex;align-items:center;justify-content:space-between;gap:14px}.brand{display:flex;align-items:center;gap:10px;font-weight:800}.brand-badge{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:18px}.brand small{display:block;color:var(--muted);font-weight:600;font-size:12px}.top-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.container{max-width:1220px;margin:0 auto;padding:28px 18px 56px}.hero{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.hero-main{padding:36px}.eyebrow{color:var(--brand);font-weight:800;letter-spacing:.08em;text-transform:uppercase;font-size:12px}.hero h1{font-size:clamp(30px,5vw,54px);line-height:1.04;margin:10px 0 16px}.hero p{color:var(--muted);font-size:17px;line-height:1.7;margin:0}.hero-side{padding:28px;display:flex;flex-direction:column;justify-content:center}.mini-stat{padding:14px 0;border-bottom:1px solid var(--line)}.mini-stat:last-child{border-bottom:0}.mini-stat b{font-size:25px;display:block}.mini-stat span{color:var(--muted);font-size:13px}
.login-box{max-width:560px;margin:28px auto 0;padding:28px}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}.field{display:flex;flex-direction:column;gap:7px}.field label{font-weight:700;font-size:13px}.field input,.field select,.field textarea{width:100%;border:1px solid #cfe0dc;border-radius:12px;padding:12px 13px;background:#fff;color:var(--ink);outline:none}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand2);box-shadow:0 0 0 3px rgba(13,148,136,.12)}
.btn{border:0;border-radius:12px;padding:11px 15px;font-weight:800;cursor:pointer;transition:.18s;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn:hover{transform:translateY(-1px)}.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff}.btn-secondary{background:#e7f5f2;color:var(--brand)}.btn-ghost{background:#fff;border:1px solid var(--line);color:var(--ink)}.btn-danger{background:#fee2e2;color:var(--bad)}.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}.w100{width:100%}.muted{color:var(--muted)}.small{font-size:13px}.notice{padding:12px 14px;border-radius:12px;background:#ecfeff;border:1px solid #bae6fd;color:#155e75;margin:14px 0}.notice.warn{background:#fffbeb;border-color:#fde68a;color:#92400e}.notice.bad{background:#fef2f2;border-color:#fecaca;color:#991b1b}
.dashboard-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:18px}.dashboard-head h2{margin:0 0 4px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:18px 0}.stat{padding:20px}.stat b{font-size:28px;display:block}.stat span{color:var(--muted);font-size:13px}.section-title{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:26px 0 12px}.section-title h3{margin:0}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:12px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}.table th{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.exam-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:18px}.exam-panel{padding:22px}.exam-meta{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px}.pill{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:7px 10px;background:#eef7f5;color:var(--brand);font-weight:800;font-size:12px}.timer{font-variant-numeric:tabular-nums;font-size:22px;font-weight:900;color:var(--bad)}.section-block{margin:0 0 24px}.section-instruction{font-weight:800;margin:0 0 10px}.passage{background:#fbfefd;border:1px solid var(--line);border-radius:14px;padding:18px;line-height:1.72;margin-bottom:14px;white-space:pre-wrap}.question{border:1px solid var(--line);border-radius:15px;padding:16px;margin:12px 0;background:#fff;scroll-margin-top:90px}.qhead{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}.qnum{font-weight:900;color:var(--brand)}.qstem{line-height:1.65;margin:8px 0 12px;white-space:pre-wrap}.options{display:grid;gap:9px}.option{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--line);border-radius:12px;padding:11px;cursor:pointer}.option:hover{border-color:#8acfc6;background:#f2fbf9}.option.selected{border-color:var(--brand2);background:#eafaf7}.option input{margin-top:3px}.mark{border:0;background:transparent;color:var(--warn);font-weight:800;cursor:pointer}.exam-side{position:sticky;top:78px;align-self:start;padding:18px}.navigator{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin:12px 0}.navq{aspect-ratio:1;border-radius:9px;border:1px solid var(--line);background:#fff;cursor:pointer;font-weight:800}.navq.done{background:#dcfce7;border-color:#86efac;color:#166534}.navq.marked{box-shadow:inset 0 0 0 2px #f59e0b}.exam-footer{display:flex;gap:10px;justify-content:flex-end;flex-wrap:wrap;margin-top:16px}
.result-hero{padding:30px;text-align:center}.score{font-size:64px;line-height:1;font-weight:950;color:var(--brand);margin:10px}.result-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:18px}.result-item{padding:14px;border:1px solid var(--line);border-radius:13px}.review-card{padding:18px;margin:10px 0}.review-card.ok{border-left:5px solid var(--ok)}.review-card.bad{border-left:5px solid var(--bad)}.explanation{background:#f8fafc;border-radius:10px;padding:12px;margin-top:10px;line-height:1.7;white-space:pre-line}.correct{color:var(--ok);font-weight:800}.incorrect{color:var(--bad);font-weight:800}
.admin-grid{display:grid;grid-template-columns:260px minmax(0,1fr);gap:18px}.admin-menu{padding:14px;position:sticky;top:78px;align-self:start}.admin-menu button{width:100%;text-align:left;margin:4px 0}.admin-main{padding:22px}.codebox{background:#0f172a;color:#e2e8f0;padding:14px;border-radius:12px;overflow:auto;font:12px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;white-space:pre-wrap}.badge{display:inline-flex;padding:4px 8px;border-radius:999px;background:#eef2ff;color:#4338ca;font-size:11px;font-weight:800}.footer{max-width:1220px;margin:auto;padding:0 18px 36px;color:var(--muted);font-size:12px;text-align:center}
@media(max-width:900px){.hero,.exam-layout,.admin-grid{grid-template-columns:1fr}.stats,.result-grid{grid-template-columns:repeat(2,1fr)}.exam-side,.admin-menu{position:static}.hero-main{padding:28px}.topbar-inner{align-items:flex-start}.exam-panel{padding:15px}}
@media(max-width:560px){.grid2,.stats,.result-grid{grid-template-columns:1fr}.container{padding:18px 12px 44px}.hero-main,.hero-side,.login-box{padding:20px}.navigator{grid-template-columns:repeat(5,1fr)}.top-actions .btn span{display:none}.question{padding:13px}.score{font-size:52px}}
.practice-panel{padding:20px;margin-top:18px}.practice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.practice-card{width:100%;display:grid;grid-template-columns:46px minmax(0,1fr) 24px;gap:12px;align-items:center;text-align:left;border:1px solid var(--line);border-radius:15px;background:#fff;padding:15px;cursor:pointer;color:var(--ink);transition:.18s}.practice-card:hover{transform:translateY(-2px);border-color:#8acfc6;background:#f2fbf9;box-shadow:0 8px 24px rgba(15,118,110,.08)}.practice-card b{display:block;font-size:14px;margin-bottom:4px}.practice-card small{display:block;color:var(--muted);line-height:1.4}.practice-icon{width:42px;height:42px;border-radius:12px;background:#e7f5f2;color:var(--brand);display:grid;place-items:center;font-size:20px;font-weight:900}.practice-arrow{color:var(--brand);font-size:20px;font-weight:900}
@media(max-width:700px){.practice-grid{grid-template-columns:1fr}}