@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Manrope:wght@600;700;800&display=swap');
:root{--bg:#f6f8fb;--surface:#fff;--surface-2:#f9fbfd;--ink:#152238;--muted:#66758a;--line:#e3e9f1;--primary:#1f4f8f;--primary-2:#163b6d;--accent:#2b7a78;--success:#1f7a50;--warning:#a76a00;--danger:#b43a46;--shadow:0 12px 35px rgba(21,34,56,.07);--shadow-lg:0 22px 55px rgba(21,34,56,.11);--radius:16px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:none}.container{width:min(1180px,92%);margin:auto}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}.nav{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:inline-flex;align-items:center;gap:9px;color:var(--ink);font-weight:800;font-size:21px;letter-spacing:-.7px}.brand-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--primary),#3478c5);display:grid;place-items:center;color:#fff;font-size:14px;box-shadow:0 6px 16px rgba(31,79,143,.24)}.brand span{color:var(--primary)}.main-nav{display:flex;align-items:center;gap:6px}.main-nav a{color:#526176;font-size:14px;font-weight:600;padding:10px 12px;border-radius:10px;transition:.2s ease}.main-nav a:hover{background:#f1f5fa;color:var(--ink)}.main-nav .nav-cta{color:#fff;background:var(--primary);padding:10px 16px;box-shadow:0 7px 18px rgba(31,79,143,.2)}.main-nav .nav-cta:hover{background:var(--primary-2);color:#fff}.nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;width:42px;height:42px;cursor:pointer;color:var(--ink)}.nav-toggle span,.nav-toggle:before,.nav-toggle:after{content:"";display:block;width:18px;height:2px;background:currentColor;margin:4px auto;border-radius:4px}.hero{padding:76px 0 64px;background:radial-gradient(circle at 88% 10%,rgba(53,119,190,.11),transparent 31%),linear-gradient(180deg,#fff 0%,#f6f8fb 100%)}.hero-grid{display:grid;grid-template-columns:minmax(0,1.18fr) minmax(320px,.82fr);gap:64px;align-items:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-size:12px;font-weight:800;letter-spacing:.11em;text-transform:uppercase}.eyebrow:before{content:"";width:24px;height:2px;background:var(--primary);border-radius:3px}.hero h1{font-family:Manrope,Inter,sans-serif;font-size:clamp(44px,6.2vw,78px);line-height:1.02;letter-spacing:-3.5px;margin:18px 0 22px;max-width:820px}.hero p{font-size:18px;line-height:1.75;color:var(--muted);max-width:690px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.btn{appearance:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--primary);background:var(--primary);color:#fff!important;border-radius:11px;padding:12px 17px;font-weight:700;font-size:14px;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background .18s ease}.btn:hover{transform:translateY(-2px);background:var(--primary-2);box-shadow:0 10px 22px rgba(31,79,143,.2)}.btn-secondary{background:#fff!important;color:var(--ink)!important;border-color:var(--line)}.btn-secondary:hover{background:#f5f8fc!important}.hero-panel{background:linear-gradient(145deg,#fff,#f6f9fd);border:1px solid var(--line);border-radius:22px;padding:28px;box-shadow:var(--shadow-lg)}.hero-panel-top{display:flex;align-items:center;justify-content:space-between;gap:15px}.status-dot{width:10px;height:10px;background:#36a66b;border-radius:50%;box-shadow:0 0 0 5px rgba(54,166,107,.12)}.hero-panel h3{font-family:Manrope;font-size:25px;margin:22px 0 8px}.hero-panel .mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:22px}.mini-stat{padding:16px;border:1px solid var(--line);border-radius:13px;background:#fff}.mini-stat strong{display:block;font-family:Manrope;font-size:22px}.mini-stat span{font-size:12px;color:var(--muted)}.section{padding:66px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:24px}.section h2{font-family:Manrope;font-size:34px;letter-spacing:-1.3px;margin:7px 0}.section-lead{color:var(--muted);margin:0;max-width:650px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.stat{background:#fff;border:1px solid var(--line);border-radius:15px;padding:22px;box-shadow:0 5px 20px rgba(21,34,56,.035);transition:.2s}.stat:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.stat b{display:block;font-family:Manrope;font-size:30px;letter-spacing:-1px}.stat span{font-size:13px;color:var(--muted)}.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.subject{position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;min-height:176px;overflow:hidden;transition:.22s ease;box-shadow:0 5px 20px rgba(21,34,56,.035)}.subject:after{content:"";position:absolute;right:-28px;bottom:-28px;width:100px;height:100px;border-radius:50%;background:rgba(31,79,143,.055)}.subject:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#cdd9e8}.subject small{display:inline-flex;width:30px;height:30px;align-items:center;justify-content:center;border-radius:9px;background:#eef4fb;color:var(--primary);font-weight:800;font-size:11px}.subject h3{font-family:Manrope;font-size:23px;line-height:1.2;margin:26px 0 6px}.card,.question-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:0 5px 22px rgba(21,34,56,.035)}.grid{display:grid;gap:16px}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}.form-card{max-width:540px;margin:55px auto}.form-group{margin:16px 0}.form-group label{display:block;font-weight:700;font-size:14px;margin-bottom:7px}.form-group input,.form-group select,.form-group textarea{width:100%;padding:12px 13px;border:1px solid var(--line);background:#fff;border-radius:11px;font:inherit;color:var(--ink);outline:none;transition:border-color .15s,box-shadow .15s}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:#83a9d4;box-shadow:0 0 0 4px rgba(31,79,143,.09)}.flash{margin:18px 0;padding:13px 16px;border:1px solid var(--line);background:#fff;border-radius:11px}.flash.error{border-left:4px solid var(--danger)}.flash.success{border-left:4px solid var(--success)}.table-wrap{overflow:auto;border:1px solid var(--line);background:#fff;border-radius:14px}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:13px 15px;border-bottom:1px solid var(--line);text-align:left}.table th{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:#637287;background:#f8fafc}.question-card{margin:18px 0}.option{display:block;padding:14px 16px;margin:9px 0;border:1px solid var(--line);background:#fff;border-radius:11px}.badge{font-size:11px;letter-spacing:.07em;text-transform:uppercase;font-weight:800;color:#637287}.result-score{font-family:Manrope;font-size:58px;letter-spacing:-2px}.danger-note{border:1px solid #ead29b;background:#fff9e9;padding:15px;border-radius:12px}.exam-body{background:#f0f3f7}.test-shell{min-height:100vh}.exam-top{position:sticky;top:0;z-index:100;background:#10233d;color:#fff;padding:12px 20px;box-shadow:0 5px 20px rgba(16,35,61,.16)}.exam-top-inner{max-width:1280px;margin:auto;display:flex;justify-content:space-between;align-items:center;gap:15px}.timer{font-weight:800;font-variant-numeric:tabular-nums;font-size:18px}.exam-layout{max-width:1280px;margin:20px auto;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px}.exam-card{background:#fff;border:1px solid #dfe5ed;padding:28px;border-radius:15px;box-shadow:0 7px 25px rgba(21,34,56,.05)}.exam-option{display:block;padding:15px;border:1px solid #dfe5ed;border-radius:11px;margin:10px 0;background:#fff;transition:.15s}.exam-option:hover{border-color:#9eb8d5;background:#f8fbff}.exam-option input{margin-right:9px}.palette{position:sticky;top:82px;height:max-content;background:#fff;border:1px solid #dfe5ed;padding:18px;border-radius:15px;box-shadow:0 7px 25px rgba(21,34,56,.05)}.palette-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.pal{padding:8px;text-align:center;border:1px solid #dfe5ed;color:var(--ink);text-decoration:none;border-radius:8px;background:#fff}.pal.answered{background:#eaf7f0;border-color:#bfe4cf}.pal.review{outline:2px solid #e0ad35}.archive-summary{padding:16px 2px;color:var(--muted);font-size:14px}.archive-summary strong{color:var(--ink);font-size:18px}.practice-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:4px}.practice-size{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);background:#fff;padding:9px 12px;border-radius:11px}.practice-size select{border:0;background:transparent;font:inherit;font-weight:600;color:var(--ink);outline:none}.practice-head{display:flex;justify-content:space-between;align-items:end;gap:20px}.practice-head h1{margin:8px 0 0;font-family:Manrope;font-size:42px;letter-spacing:-1.5px}.practice-head h1 .muted{font-family:Inter;font-size:20px;font-weight:500}.practice-progress{height:7px;background:#e3e9f1;border-radius:99px;margin:22px 0 18px;overflow:hidden}.practice-progress span{display:block;height:100%;background:linear-gradient(90deg,var(--primary),#4c8bc8);border-radius:99px;transition:width .3s ease}.practice-card{max-width:900px;margin:0 auto}.question-text{font-size:21px;line-height:1.75;margin:18px 0 25px}.practice-option{display:flex;gap:12px;align-items:flex-start;cursor:pointer;transition:.15s}.practice-option:hover,.practice-option.selected{border-color:#9bb7d7;background:#f7faff;box-shadow:0 4px 14px rgba(31,79,143,.05)}.practice-option input{margin-top:5px;accent-color:var(--primary)}.practice-option span{flex:1}.practice-nav{display:flex;justify-content:space-between;gap:12px;margin-top:24px}.practice-nav button:disabled{opacity:.45;cursor:not-allowed}.practice-palette{max-width:900px;margin:18px auto 0;padding:18px 20px;background:#fff;border:1px solid var(--line);border-radius:14px}.practice-palette-grid{grid-template-columns:repeat(10,1fr);margin-top:12px}.practice-palette-grid .pal{background:#fff}.practice-palette-grid .pal.answered{background:#eaf7f0}.practice-palette-grid .pal.current{border-color:var(--primary);box-shadow:inset 0 0 0 2px var(--primary)}.practice-note{text-align:center}.question-detail-meta{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:12px}.question-detail-card{max-width:1000px;margin:0 auto}.question-number{font-family:Manrope;font-size:56px;line-height:1;letter-spacing:-2px}.question-detail-card .question-text{font-size:21px}.options-read{margin-top:22px}.answer-card{max-width:1000px;margin:18px auto}.answer-card h2{font-family:Manrope;font-size:46px;letter-spacing:-1.5px;margin:6px 0}.explanation{font-size:18px;line-height:1.8}.question-pager{max-width:1000px;margin:18px auto;display:flex;justify-content:space-between;gap:12px}.is-disabled{pointer-events:none;opacity:.45}footer{margin-top:70px;padding:35px 0;border-top:1px solid var(--line);background:#fff}.footer-inner{display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:13px}.admin-table{width:100%;border-collapse:collapse}.admin-table th,.admin-table td{text-align:left;padding:10px;border-bottom:1px solid var(--line);vertical-align:top}.btn-secondary{background:#fff!important;color:var(--ink)!important;border:1px solid var(--line)}
@media(max-width:900px){.hero-grid,.exam-layout{grid-template-columns:1fr}.subject-grid,.grid-3{grid-template-columns:1fr}.grid-4,.stats{grid-template-columns:repeat(2,1fr)}.hero{padding:54px 0}.hero h1{letter-spacing:-2.5px}.palette{position:static}.main-nav{display:none;position:absolute;left:4%;right:4%;top:68px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:8px;box-shadow:var(--shadow-lg);flex-direction:column;align-items:stretch}.main-nav.open{display:flex}.main-nav a{display:block}.nav-cta{text-align:center}.nav-toggle{display:block}.footer-inner{flex-direction:column}}
@media(max-width:700px){.container{width:min(94%,560px)}.hero h1{font-size:43px}.hero p{font-size:16px}.section{padding:48px 0}.section-head{align-items:flex-start;flex-direction:column}.section h2{font-size:29px}.grid-4,.stats{grid-template-columns:1fr 1fr}.practice-head{align-items:flex-start;flex-direction:column}.practice-head h1{font-size:34px}.practice-palette-grid{grid-template-columns:repeat(5,1fr)}.question-text{font-size:18px}.question-detail-meta{align-items:flex-start;flex-direction:column}.question-number{font-size:45px}.archive-table{border:0;background:transparent}.archive-table table,.archive-table thead{display:block}.archive-table thead{display:none}.archive-table tbody{display:grid;gap:10px}.archive-table tr{display:grid;grid-template-columns:70px 1fr;gap:5px 12px;background:#fff;border:1px solid var(--line);padding:15px;border-radius:12px;box-shadow:0 3px 14px rgba(21,34,56,.03)}.archive-table td{border:0;padding:0}.archive-table td:nth-child(1){grid-column:1}.archive-table td:nth-child(2){grid-column:2}.archive-table td:nth-child(3){grid-column:1/-1;font-size:13px}.archive-table td:nth-child(4){grid-column:1/-1}.archive-table td:nth-child(5){grid-column:1/-1;margin-top:4px}.practice-actions{align-items:stretch}.practice-actions>*{flex:1 1 auto}.practice-size{justify-content:center}.practice-nav{position:sticky;bottom:0;background:rgba(246,248,251,.96);padding:10px 0;z-index:10}.practice-option{padding:13px}.answer-card h2{font-size:38px}}