/* =====================================================================
   Цахим шалгалтын систем — Үндсэн загвар
   Хүмүүнлэгийн Ухааны Их Сургуулийн албан ёсны брэнд өнгө:
     • Fun Blue      #2061B7  (үндсэн цэнхэр)
     • Wild Sand     #F6F6F6  (цайвар нейтрал)
     • Revolver      #281A39  (гүн хөхөвтөр ягаан)
   Нэмэлт акцент: гүн ногоон-цэнхэр (teal) — шар өнгө ОГТ ашиглаагүй.
   ===================================================================== */
:root{
  /* Брэнд өнгө */
  --brand:#2061B7; --brand-600:#1B57A5; --brand-700:#17498A;
  --brand-800:#123C73; --brand-900:#0E3568;
  --brand-50:#EEF4FC; --brand-100:#DCE9F9; --brand-200:#C2DAF5;
  /* Гүн өнгө (sidebar) */
  --plum:#281A39; --plum-700:#1E1230; --plum-500:#3B2A55;
  /* Акцент */
  --teal:#0E8A8C; --teal-600:#0B7476; --teal-bg:#E2F4F4;
  /* Текст, шугам */
  --ink:#1E2233; --muted:#5A6478; --muted-2:#8A93A6;
  --line:#E4E8F0; --bg:#F5F7FB; --card:#ffffff;
  /* Төлөв */
  --ok:#0F7A52; --ok-bg:#E3F4EB; --warn:#C2410C; --warn-bg:#FCEDE4;
  --err:#B42318; --err-bg:#FDECEA; --info:#2061B7; --info-bg:#EAF1FB;
  --radius:14px; --radius-sm:10px;
  --shadow:0 12px 36px rgba(18,60,115,.10);
  --shadow-sm:0 3px 14px rgba(18,60,115,.07);
  --sidebar:264px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:"Segoe UI",system-ui,-apple-system,"Noto Sans",Arial,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.6;font-size:15px;
  -webkit-font-smoothing:antialiased
}
a{color:var(--brand-700);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{margin:0 0 .5em;color:var(--brand-800);line-height:1.3;font-weight:700}
h1{font-size:24px}h2{font-size:19px}h3{font-size:16px}
p{margin:0 0 1em}
code{background:#EEF2FA;padding:2px 6px;border-radius:6px;font-size:.88em;color:var(--brand-700)}
img{max-width:100%}
.icon{display:inline-block;vertical-align:-.18em;flex-shrink:0}
.muted{color:var(--muted)}
.text-center{text-align:center}
.text-right{text-align:right}
.nowrap{white-space:nowrap}
.mt-0{margin-top:0}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}
.mb-0{margin-bottom:0}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}
.flex{display:flex}.items-center{align-items:center}.justify-between{justify-content:space-between}
.gap-1{gap:8px}.gap-2{gap:16px}.wrap{flex-wrap:wrap}
.hidden{display:none!important}

/* ---------- Auth / нийтийн хуудас ---------- */
.auth-shell{
  min-height:100vh;display:grid;grid-template-columns:1.05fr .95fr;background:var(--bg)
}
.auth-hero{
  background:
    linear-gradient(150deg,rgba(14,53,104,.94) 0%,rgba(18,60,115,.92) 45%,rgba(40,26,57,.94) 100%),
    url("../img/hero-building.jpg") center/cover no-repeat;
  color:#fff;padding:56px 52px;display:flex;flex-direction:column;justify-content:space-between;
  position:relative;overflow:hidden
}
.auth-hero::after{
  content:"";position:absolute;right:-120px;bottom:-120px;width:420px;height:420px;
  border-radius:50%;background:radial-gradient(circle,rgba(14,138,140,.30),transparent 70%)
}
.auth-hero::before{
  content:"";position:absolute;left:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(32,97,183,.45),transparent 70%)
}
.auth-hero .hero-inner{position:relative;z-index:1}
.auth-hero .logo-row{display:flex;align-items:center;gap:14px;margin-bottom:40px}
.auth-hero .logo-row img{width:56px;height:56px;border-radius:14px;background:#fff;padding:5px;object-fit:contain}
.auth-hero .org{font-size:14px;letter-spacing:.3px;opacity:.9;line-height:1.4}
.auth-hero h1{color:#fff;font-size:30px;margin:0 0 12px;letter-spacing:.2px}
.auth-hero p{color:#C7D8F2;max-width:420px;font-size:15px}
.auth-hero .features{list-style:none;padding:0;margin:26px 0 0}
.auth-hero .features li{display:flex;gap:10px;align-items:flex-start;margin-bottom:12px;color:#D9E5F8;font-size:14.5px}
.auth-hero .features svg{flex:0 0 18px;margin-top:3px;opacity:.9;color:#8FD3D4}
.auth-hero .foot{position:relative;z-index:1;font-size:12.5px;color:#9DB2D6}

.auth-panel{display:flex;align-items:center;justify-content:center;padding:40px 26px}
.auth-card{width:100%;max-width:430px;background:var(--card);border-radius:18px;box-shadow:var(--shadow);padding:36px 34px}
.auth-card h2{font-size:22px;margin-bottom:4px}
.auth-card .sub{color:var(--muted);font-size:14px;margin-bottom:24px}
.auth-switch{margin-top:22px;text-align:center;font-size:14px;color:var(--muted)}
.auth-mobile-brand{display:none}

/* ---------- Forms ---------- */
.form-group{margin-bottom:16px}
label{display:block;font-size:13.5px;font-weight:600;color:#33415C;margin-bottom:7px}
.input,input[type=text],input[type=password],input[type=email],input[type=number],
input[type=datetime-local],select,textarea{
  width:100%;padding:11px 13px;border:1.5px solid var(--line);border-radius:var(--radius-sm);
  font-size:15px;font-family:inherit;background:#FBFCFE;color:var(--ink);transition:.15s
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(32,97,183,.13)}
textarea{resize:vertical;min-height:88px}
select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%235A6478' d='M6 8L0 0h12z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:38px}
.field-error{color:var(--err);font-size:13px;margin-top:6px}
.help{color:var(--muted);font-size:12.5px;margin-top:6px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.checkbox-row{display:flex;align-items:center;gap:9px}
.checkbox-row input{width:18px;height:18px;accent-color:var(--brand)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-sm);border:1.5px solid transparent;
  font-size:14.5px;font-weight:700;font-family:inherit;cursor:pointer;transition:.15s;
  text-decoration:none;line-height:1.2;white-space:nowrap
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-800));color:#fff;box-shadow:0 6px 18px rgba(32,97,183,.30)}
.btn-primary:hover{box-shadow:0 10px 26px rgba(32,97,183,.40);color:#fff}
.btn-accent{background:linear-gradient(135deg,var(--teal),var(--teal-600));color:#fff;box-shadow:0 6px 18px rgba(14,138,140,.28)}
.btn-accent:hover{color:#fff;box-shadow:0 10px 26px rgba(14,138,140,.36)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--brand-800)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:#F8FBFF}
.btn-danger{background:#fff;border-color:#F3C6C0;color:var(--err)}
.btn-danger:hover{background:var(--err-bg)}
.btn-success{background:var(--ok);color:#fff}
.btn-sm{padding:7px 13px;font-size:13px;border-radius:8px}
.btn-lg{padding:14px 28px;font-size:16px}
.btn-block{width:100%}
.btn[disabled],.btn.disabled{opacity:.55;pointer-events:none}

/* ---------- Alerts ---------- */
.alert{padding:14px 17px;border-radius:var(--radius-sm);margin-bottom:18px;font-size:14px;border:1px solid transparent;display:flex;gap:10px;align-items:flex-start}
.alert ul{margin:6px 0 0;padding-left:18px}
.alert-error{background:var(--err-bg);color:var(--err);border-color:#F5C6C0}
.alert-success{background:var(--ok-bg);color:var(--ok);border-color:#BFE6D4}
.alert-warning{background:var(--warn-bg);color:var(--warn);border-color:#F4CDB4}
.alert-info{background:var(--info-bg);color:var(--brand-800);border-color:#CADCF7}
.alert .icon{flex:0 0 20px}

/* ---------- App layout ---------- */
.app{display:flex;min-height:100vh}
.sidebar{
  width:var(--sidebar);flex:0 0 var(--sidebar);
  background:linear-gradient(185deg,var(--brand-800) 0%,var(--brand-900) 42%,var(--plum) 100%);
  color:#C9D8F2;display:flex;flex-direction:column;position:fixed;top:0;bottom:0;left:0;z-index:60;
  transition:transform .25s ease
}
.sidebar .brand{padding:20px 20px 16px;display:flex;align-items:center;gap:12px;border-bottom:1px solid rgba(255,255,255,.09)}
.sidebar .brand img{width:42px;height:42px;border-radius:11px;background:#fff;padding:4px;object-fit:contain}
.sidebar .brand .name{font-size:14px;font-weight:800;color:#fff;line-height:1.25}
.sidebar .brand .sub{font-size:11px;color:#9DB2D6}
.nav{flex:1;overflow-y:auto;padding:14px 12px}
.nav-group-label{font-size:11px;text-transform:uppercase;letter-spacing:.8px;color:#8194BD;padding:14px 12px 6px;font-weight:700}
.nav a{
  display:flex;align-items:center;gap:11px;padding:10px 13px;border-radius:10px;color:#CDD9F0;
  font-size:14.5px;font-weight:600;margin-bottom:3px;transition:.13s
}
.nav a:hover{background:rgba(255,255,255,.08);color:#fff;text-decoration:none}
.nav a.active{background:rgba(255,255,255,.14);color:#fff;box-shadow:inset 3px 0 0 var(--teal)}
.nav a svg{flex:0 0 19px;opacity:.92}
.sidebar .side-foot{padding:14px 16px;border-top:1px solid rgba(255,255,255,.09);font-size:12px;color:#8FA4C8}

.main{flex:1;margin-left:var(--sidebar);display:flex;flex-direction:column;min-width:0}
.topbar{
  height:64px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;
  gap:16px;padding:0 24px;position:sticky;top:0;z-index:40
}
.topbar .menu-toggle{display:none;background:none;border:none;color:var(--brand-800);cursor:pointer;padding:6px}
.topbar .page-title{font-size:16px;font-weight:700;color:var(--brand-800);margin:0}
.topbar .spacer{flex:1}
.topbar .user-chip{display:flex;align-items:center;gap:10px}
.avatar{
  width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-800));
  color:#fff;display:grid;place-items:center;font-weight:800;font-size:15px;flex:0 0 38px
}
.user-chip .meta{line-height:1.25}
.user-chip .meta .nm{font-size:13.5px;font-weight:700;color:var(--ink)}
.user-chip .meta .rl{font-size:11.5px;color:var(--muted)}
.content{padding:24px;flex:1;max-width:1400px;width:100%}

/* ---------- Cards & stats ---------- */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-sm);border:1px solid rgba(228,232,240,.8);padding:22px;margin-bottom:20px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px;flex-wrap:wrap}
.card-head h2,.card-head h3{margin:0}
.card-sub{color:var(--muted);font-size:13.5px;margin-top:2px}

.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px;margin-bottom:22px}
.stat{background:#fff;border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-sm);border:1px solid rgba(228,232,240,.8);position:relative;overflow:hidden}
.stat::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:var(--brand)}
.stat.green::before{background:var(--ok)}
.stat.navy::before{background:var(--brand-800)}
.stat.plum::before{background:var(--plum-500)}
.stat .stat-label{font-size:12.5px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.4px}
.stat .stat-value{font-size:30px;font-weight:800;color:var(--brand-800);line-height:1.15;margin:6px 0 2px}
.stat .stat-note{font-size:12.5px;color:var(--muted-2)}
.stat .stat-icon{position:absolute;right:16px;top:16px;color:var(--brand);opacity:.16}
.stat.green .stat-icon{color:var(--ok)}
.stat.plum .stat-icon{color:var(--plum-500)}
.stat.navy .stat-icon{color:var(--brand-800)}

/* ---------- Table ---------- */
.table-wrap{overflow-x:auto;border-radius:var(--radius-sm)}
table.data{width:100%;border-collapse:collapse;font-size:14px;background:#fff}
table.data th{
  text-align:left;padding:12px 14px;background:#F6F9FE;color:var(--brand-800);font-size:12.5px;
  text-transform:uppercase;letter-spacing:.4px;font-weight:700;border-bottom:1px solid var(--line);white-space:nowrap
}
table.data td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
table.data tbody tr:hover{background:#F9FBFF}
table.data tbody tr:last-child td{border-bottom:none}
table.data .num{text-align:right;font-variant-numeric:tabular-nums}
.row-actions{display:flex;gap:6px;flex-wrap:wrap}
.empty{padding:44px 20px;text-align:center;color:var(--muted)}
.empty .big{color:var(--brand-200);margin-bottom:10px}
.empty .big svg{width:52px;height:52px}

/* ---------- Badges ---------- */
.badge{display:inline-flex;align-items:center;gap:5px;padding:4px 11px;border-radius:999px;font-size:12px;font-weight:700;line-height:1.5}
.badge-success{background:var(--ok-bg);color:var(--ok)}
.badge-warning{background:var(--warn-bg);color:var(--warn)}
.badge-muted{background:#EEF1F7;color:var(--muted)}
.badge-info{background:var(--info-bg);color:var(--brand-700)}
.badge-danger{background:var(--err-bg);color:var(--err)}
.badge-teal{background:var(--teal-bg);color:var(--teal-600)}
.badge-plum{background:#EFEAF4;color:var(--plum-500)}

/* ---------- Progress ---------- */
.progress{height:9px;background:#EEF2FA;border-radius:999px;overflow:hidden}
.progress > span{display:block;height:100%;background:linear-gradient(90deg,var(--brand-200),var(--brand));border-radius:999px}
.progress.ok > span{background:linear-gradient(90deg,#2FB27E,var(--ok))}
.progress.warn > span{background:linear-gradient(90deg,#E97A4E,var(--warn))}
.progress.err > span{background:linear-gradient(90deg,#E0574A,var(--err))}

/* ---------- Exam cards (student) ---------- */
.exam-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:18px}
.exam-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-sm);border:1px solid rgba(228,232,240,.8);padding:20px;display:flex;flex-direction:column;transition:.16s}
.exam-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.exam-card h3{font-size:16.5px;margin-bottom:6px}
.exam-card .subject{font-size:12.5px;color:var(--teal-600);font-weight:700;text-transform:uppercase;letter-spacing:.4px}
.exam-card .desc{color:var(--muted);font-size:13.5px;flex:1;margin:10px 0}
.exam-meta{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted);margin:12px 0}
.exam-meta .row{display:flex;gap:8px;align-items:center}
.exam-meta .row svg{color:var(--brand);opacity:.75}
.exam-card .foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:8px;padding-top:14px;border-top:1px solid var(--line)}

/* ---------- Exam taking ---------- */
.exam-timer{
  position:sticky;top:64px;z-index:30;background:#fff;border-radius:var(--radius);
  box-shadow:var(--shadow);padding:14px 20px;display:flex;align-items:center;justify-content:space-between;
  gap:16px;margin-bottom:20px;border-left:5px solid var(--brand);flex-wrap:wrap
}
.exam-timer .clock{font-size:26px;font-weight:800;color:var(--brand-800);font-variant-numeric:tabular-nums}
.exam-timer.danger{border-left-color:var(--err)}
.exam-timer.danger .clock{color:var(--err)}
.exam-timer .info{font-size:13px;color:var(--muted)}
.question{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-sm);border:1px solid rgba(228,232,240,.8);padding:22px;margin-bottom:16px}
.question .q-head{display:flex;gap:12px;align-items:flex-start;margin-bottom:14px}
.question .q-no{flex:0 0 34px;height:34px;border-radius:9px;background:var(--brand-50);color:var(--brand-700);display:grid;place-items:center;font-weight:800}
.question .q-text{font-size:16px;font-weight:600;flex:1}
.question .q-points{font-size:12.5px;color:var(--muted);white-space:nowrap}
.question.is-text .q-no{background:var(--teal-bg);color:var(--teal-600)}
.options{display:flex;flex-direction:column;gap:9px}
.option{display:flex;align-items:flex-start;gap:11px;padding:12px 15px;border:1.5px solid var(--line);border-radius:var(--radius-sm);cursor:pointer;transition:.13s;background:#FBFCFE}
.option:hover{border-color:var(--brand);background:#F5F9FF}
.option input{width:18px;height:18px;margin-top:2px;accent-color:var(--brand);flex:0 0 18px}
.option.selected{border-color:var(--brand);background:#EEF4FF;box-shadow:0 0 0 3px rgba(32,97,183,.11)}
.option.correct{border-color:var(--ok);background:var(--ok-bg)}
.option.wrong{border-color:var(--err);background:var(--err-bg)}
.option .mark{flex:0 0 20px;display:grid;place-items:center}
.option.correct .mark{color:var(--ok)}
.option.wrong .mark{color:var(--err)}

/* Нээлттэй (гараар бичих) асуулт */
.answer-hint{
  display:flex;gap:9px;align-items:flex-start;background:var(--teal-bg);color:var(--teal-600);
  border:1px solid #BFE4E4;border-radius:var(--radius-sm);padding:11px 14px;font-size:13.5px;margin-bottom:10px
}
.answer-hint svg{flex:0 0 18px;margin-top:2px}
.open-answer{
  width:100%;min-height:130px;padding:14px 16px;border:1.5px dashed var(--brand-200);border-radius:var(--radius-sm);
  font-size:15px;font-family:inherit;line-height:1.6;background:#FBFCFF;color:var(--ink);transition:.15s
}
.open-answer:focus{outline:none;border-style:solid;border-color:var(--teal);background:#fff;box-shadow:0 0 0 4px rgba(14,138,140,.12)}
.open-answer::placeholder{color:var(--muted-2)}
.open-answer-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--muted-2);margin-top:6px}
.answer-text{
  background:var(--brand-50);border-left:4px solid var(--brand);border-radius:8px;padding:12px 16px;
  font-size:14.5px;white-space:pre-wrap;line-height:1.65;color:var(--ink);margin-top:8px
}
.answer-text.empty-answer{color:var(--muted-2);font-style:italic;background:#F4F6FA;border-left-color:#CBD3E1}
.grade-box{display:flex;gap:8px;align-items:center;margin-top:10px;flex-wrap:wrap}
.grade-box input[type=number]{width:110px}

/* ---------- Result ---------- */
.result-hero{background:linear-gradient(140deg,var(--brand-800),var(--plum));color:#fff;border-radius:var(--radius);padding:34px;text-align:center;margin-bottom:22px;position:relative;overflow:hidden}
.result-hero::after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(14,138,140,.35),transparent 70%)}
.result-hero .score{font-size:52px;font-weight:800;line-height:1;position:relative;z-index:1}
.result-hero .score small{font-size:20px;opacity:.75;font-weight:600}
.result-hero .pct{font-size:17px;margin-top:6px;color:#D9E5F8;position:relative;z-index:1}
.result-hero .grade{display:inline-block;margin-top:14px;padding:6px 20px;border-radius:999px;background:rgba(255,255,255,.16);font-weight:700;font-size:15px;position:relative;z-index:1}
.result-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin-bottom:22px}
.result-stats .rs{background:#fff;border-radius:var(--radius);padding:16px;text-align:center;box-shadow:var(--shadow-sm);border:1px solid rgba(228,232,240,.8)}
.result-stats .rs .v{font-size:22px;font-weight:800;color:var(--brand-800)}
.result-stats .rs .l{font-size:12.5px;color:var(--muted);margin-top:3px}

/* ---------- Charts ---------- */
.chart-box{position:relative;height:300px}
.chart-box.sm{height:240px}
.chart-box.lg{height:340px}
.chart-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.chart-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}

/* ---------- Modal ---------- */
.modal-back{position:fixed;inset:0;background:rgba(30,18,48,.55);display:none;align-items:center;justify-content:center;z-index:100;padding:20px}
.modal-back.open{display:flex}
.modal{background:#fff;border-radius:var(--radius);max-width:560px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:0 24px 70px rgba(18,30,70,.35)}
.modal .m-head{padding:20px 24px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}
.modal .m-head h3{margin:0}
.modal .m-body{padding:22px 24px}
.modal .m-foot{padding:16px 24px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:10px}
.modal .x{background:none;border:none;color:var(--muted);cursor:pointer;line-height:1;display:grid;place-items:center}

/* ---------- Filter bar ---------- */
.filter-bar{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap;margin-bottom:18px}
.filter-bar .field{flex:1;min-width:180px;margin:0}
.filter-bar label{margin-bottom:6px}

/* ---------- Public landing ---------- */
.public-nav{background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);padding:12px 0;position:sticky;top:0;z-index:50}
.public-nav .wrap{max-width:1200px;margin:0 auto;padding:0 22px;display:flex;align-items:center;gap:14px}
.public-nav img{width:48px;height:48px;object-fit:contain}
.public-nav .ttl{font-weight:800;color:var(--brand-800);font-size:15px;line-height:1.2}
.public-nav .ttl small{display:block;font-weight:500;color:var(--muted);font-size:11.5px}

/* Hero: барилгын зураг + цэнхэр overlay */
.hero{
  position:relative;color:#fff;padding:96px 0 110px;overflow:hidden;
  background:#0E3568
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:url("../img/hero-building.jpg") center 38%/cover no-repeat;
  transform:scale(1.03)
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(115deg,rgba(14,53,104,.95) 0%,rgba(23,73,138,.88) 38%,rgba(32,97,183,.72) 62%,rgba(40,26,57,.90) 100%);
  background-blend-mode:multiply
}
.hero .wrap{max-width:1200px;margin:0 auto;padding:0 22px;position:relative;z-index:2}
.hero .eyebrow{
  display:inline-flex;align-items:center;gap:9px;background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.22);border-radius:999px;padding:7px 16px;font-size:13px;
  font-weight:600;letter-spacing:.3px;margin-bottom:20px;backdrop-filter:blur(4px)
}
.hero .eyebrow svg{color:#8FD3D4}
.hero h1{color:#fff;font-size:42px;max-width:820px;margin-bottom:18px;line-height:1.18;text-shadow:0 2px 20px rgba(0,0,0,.25)}
.hero p{color:#DCE8FA;font-size:17.5px;max-width:660px;text-shadow:0 1px 10px rgba(0,0,0,.2)}
.hero .cta{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.hero .hero-facts{display:flex;gap:34px;margin-top:44px;flex-wrap:wrap}
.hero .hero-facts .fact{display:flex;align-items:center;gap:11px}
.hero .hero-facts .fact .fi{
  width:44px;height:44px;border-radius:12px;background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.2);display:grid;place-items:center;flex:0 0 44px
}
.hero .hero-facts .fact .fv{font-size:20px;font-weight:800;line-height:1.1}
.hero .hero-facts .fact .fl{font-size:12.5px;color:#C7D8F2}

.features{max-width:1200px;margin:-56px auto 0;padding:0 22px 66px;position:relative;z-index:3;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.feature{background:#fff;border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);border:1px solid rgba(228,232,240,.8);transition:.18s}
.feature:hover{transform:translateY(-4px)}
.feature .ic{width:50px;height:50px;border-radius:13px;background:linear-gradient(135deg,var(--brand-50),var(--brand-100));color:var(--brand-700);display:grid;place-items:center;margin-bottom:15px}
.feature .ic.teal{background:linear-gradient(135deg,var(--teal-bg),#CDEDED);color:var(--teal-600)}
.feature .ic.plum{background:linear-gradient(135deg,#EFEAF4,#E2D8EC);color:var(--plum-500)}
.feature h3{font-size:16px;margin-bottom:7px}
.feature p{margin:0;font-size:13.8px}

.public-foot{background:var(--plum);color:#A9B6D4;padding:34px 0;text-align:center;font-size:13.5px}
.public-foot .brand-line{display:flex;align-items:center;justify-content:center;gap:11px;margin-bottom:12px}
.public-foot .brand-line img{width:38px;height:38px;object-fit:contain;background:#fff;border-radius:9px;padding:3px}

/* ---------- Sidebar overlay (mobile) ---------- */
.overlay{position:fixed;inset:0;background:rgba(18,30,60,.55);z-index:55;display:none}
.overlay.show{display:block}

/* ---------- Responsive ---------- */
@media(max-width:1024px){
  .auth-shell{grid-template-columns:1fr}
  .auth-hero{display:none}
  .auth-mobile-brand{display:flex;align-items:center;gap:12px;margin-bottom:22px}
  .auth-mobile-brand img{width:48px;height:48px;object-fit:contain}
  .chart-grid,.chart-grid-3{grid-template-columns:1fr}
}
@media(max-width:900px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .main{margin-left:0}
  .topbar .menu-toggle{display:block}
  .content{padding:16px}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .hero{padding:70px 0 96px}
  .hero h1{font-size:30px}
  .exam-grid{grid-template-columns:1fr}
}
@media(max-width:560px){
  .topbar{padding:0 14px;gap:10px}
  .topbar .user-chip .meta{display:none}
  .card{padding:16px}
  .stat .stat-value{font-size:25px}
  .result-hero .score{font-size:42px}
  .auth-card{padding:26px 20px}
  .hero{padding:56px 0 88px}
  .hero h1{font-size:25px}
  .hero p{font-size:15.5px}
  .hero .hero-facts{gap:20px;margin-top:30px}
  table.data th,table.data td{padding:10px 10px}
  .btn{padding:10px 16px}
  .exam-timer .clock{font-size:22px}
}
@media print{
  .sidebar,.topbar,.no-print{display:none!important}
  .main{margin-left:0}
  .content{padding:0}
}