/* EduTrack V4 — unified student and administration interface */
:root{
  --primary:#1d4ed8;
  --primary-2:#2563eb;
  --primary-soft:#eef4ff;
  --teal:#0f9f9a;
  --teal-soft:#e8f8f6;
  --navy:#102a56;
  --ink:#17223b;
  --muted:#68758b;
  --surface:#ffffff;
  --surface-2:#f8fafc;
  --page:#f3f6fb;
  --border:#dfe7f2;
  --border-strong:#cdd9e8;
  --success:#12805c;
  --success-soft:#e9f8f2;
  --danger:#d23f50;
  --danger-soft:#fff0f2;
  --warning:#c58200;
  --warning-soft:#fff7df;
  --purple:#7655d9;
  --shadow-sm:0 4px 18px rgba(27,47,86,.06);
  --shadow-md:0 16px 44px rgba(27,47,86,.10);
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:24px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:
    radial-gradient(circle at 85% 0,rgba(37,99,235,.07),transparent 30%),
    linear-gradient(180deg,#f7f9fd 0,#f3f6fb 100%);
  font-family:"Tajawal","Cairo","Segoe UI",Tahoma,Arial,sans-serif;
  font-size:16px;
  line-height:1.65;
}
a{color:var(--primary);transition:.18s ease}
a:hover{color:#133eae}
button,input,select,textarea{font:inherit}
button,a,.card,.admin-section,.answer,.result-stat,.score-ring{transition:.18s ease}
button{cursor:pointer}
button:disabled{cursor:not-allowed;opacity:.6}

/* Shared top navigation */
.top{
  min-height:76px;
  height:auto;
  padding:12px max(24px,calc((100vw - 1360px)/2));
  background:rgba(255,255,255,.94);
  border-bottom:1px solid rgba(205,217,232,.9);
  box-shadow:0 4px 22px rgba(18,42,86,.045);
  backdrop-filter:blur(14px);
  position:sticky;
  top:0;
  z-index:100;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:22px;
}
.top>b{
  color:var(--navy);
  font-size:22px;
  font-weight:900;
  white-space:nowrap;
  display:flex;
  align-items:center;
  gap:11px;
}
.top>b::before{
  content:"E";
  width:38px;
  height:38px;
  border-radius:12px;
  display:grid;
  place-items:center;
  color:#fff;
  font-weight:900;
  font-size:19px;
  background:linear-gradient(135deg,var(--primary-2),var(--teal));
  box-shadow:0 8px 20px rgba(29,78,216,.22);
}
.top nav,.admin-nav{
  display:flex;
  align-items:center;
  gap:5px;
  flex-wrap:wrap;
}
.top nav a,.top nav span,.admin-nav a{
  min-height:40px;
  padding:8px 12px;
  border-radius:11px;
  color:#35506f;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  white-space:nowrap;
}
.top nav a:hover,.admin-nav a:hover{background:var(--primary-soft);color:var(--primary)}
.admin-nav a.active{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 8px 18px rgba(29,78,216,.18)}
.top nav span{background:#f4f7fb;color:var(--navy)}
.admin-nav a:nth-child(1)::before{content:"▦";margin-left:7px}
.admin-nav a:nth-child(2)::before{content:"✓";margin-left:7px}
.admin-nav a:nth-child(3)::before{content:"◉";margin-left:7px}
.admin-nav a:nth-child(4)::before{content:"♙";margin-left:7px}
.admin-nav a:nth-child(5)::before{content:"▤";margin-left:7px}

.container{max-width:1320px;margin:34px auto;padding:0 24px}
.admin-container{max-width:1380px}
h1,h2,h3{color:var(--navy);line-height:1.35}
h1{font-size:clamp(28px,3vw,42px);margin:0 0 8px;font-weight:900;letter-spacing:-.5px}
h2{font-size:25px;margin:0 0 14px;font-weight:900}
h3{font-size:19px}
.muted,.meta{color:var(--muted)}
.page-title-row,.result-heading{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  margin:0 0 26px;
  padding:26px 30px;
  border:1px solid rgba(223,231,242,.95);
  border-radius:var(--radius-lg);
  background:linear-gradient(135deg,rgba(255,255,255,.98),rgba(238,244,255,.78));
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  position:relative;
}
.page-title-row::after,.result-heading::after{
  content:"";
  position:absolute;
  width:180px;height:180px;border-radius:50%;
  left:-55px;bottom:-110px;
  background:linear-gradient(135deg,rgba(37,99,235,.12),rgba(15,159,154,.08));
}
.page-title-row p,.result-heading p{margin:0;color:var(--muted);font-size:16px}

/* Controls */
.primary,.link,.submit,.auth .primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:11px 20px;
  border:0;
  border-radius:12px;
  color:#fff;
  background:linear-gradient(135deg,var(--primary),var(--teal));
  box-shadow:0 9px 22px rgba(29,78,216,.18);
  font-weight:900;
  text-decoration:none;
}
.primary:hover,.link:hover,.submit:hover{color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(29,78,216,.23)}
.secondary-btn,button:not(.primary):not(.submit):not(.danger):not(.option):not(.save-question){
  min-height:40px;
  padding:8px 14px;
  border:1px solid var(--border-strong);
  border-radius:10px;
  background:#fff;
  color:#344767;
  font-weight:800;
}
button:not(.primary):not(.submit):not(.danger):not(.option):not(.save-question):hover{background:var(--primary-soft);border-color:#aebfdb;color:var(--primary)}
.danger{border:0;background:var(--danger-soft);color:var(--danger);padding:8px 13px;border-radius:10px;font-weight:800}
.danger:hover{background:#ffe2e6}
.alert,.success{
  border-radius:13px;
  padding:14px 17px;
  margin:0 0 16px;
  border:1px solid transparent;
  font-weight:700;
}
.alert{background:var(--danger-soft);color:#a92737;border-color:#ffd4da}
.success{background:var(--success-soft);color:var(--success);border-color:#c9efdf}

input,select,textarea,.auth input,.grid-form input,.grid-form select,.grid-form textarea{
  width:100%;
  min-height:46px;
  padding:10px 13px;
  border:1px solid var(--border-strong);
  border-radius:11px;
  background:#fff;
  color:var(--ink);
  outline:none;
}
textarea,.grid-form textarea{min-height:100px;resize:vertical}
input:focus,select:focus,textarea:focus{border-color:#6e96ef;box-shadow:0 0 0 4px rgba(37,99,235,.09)}
label{font-weight:750;color:#344767}

/* Student dashboard */
.student-dashboard .container{max-width:1320px}
.dashboard-hero{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(280px,.7fr);
  gap:24px;
  align-items:center;
  min-height:230px;
  padding:34px;
  border-radius:28px;
  color:#fff;
  background:
    linear-gradient(120deg,rgba(14,53,119,.98),rgba(29,78,216,.94) 52%,rgba(15,159,154,.90)),
    radial-gradient(circle at 20% 20%,rgba(255,255,255,.18),transparent 30%);
  box-shadow:0 22px 55px rgba(16,42,86,.18);
  position:relative;
  overflow:hidden;
  margin-bottom:22px;
}
.dashboard-hero::before,.dashboard-hero::after{content:"";position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,.18)}
.dashboard-hero::before{width:230px;height:230px;left:-70px;top:-90px}
.dashboard-hero::after{width:320px;height:320px;left:40%;bottom:-260px}
.dashboard-hero h1,.dashboard-hero p{color:#fff;position:relative;z-index:1}
.dashboard-hero h1{font-size:clamp(30px,4vw,48px);margin-bottom:10px}
.dashboard-hero p{margin:0;max-width:650px;color:rgba(255,255,255,.84);font-size:17px}
.hero-visual{
  min-height:150px;
  display:grid;
  place-items:center;
  position:relative;
}
.hero-orbit{
  width:145px;height:145px;border-radius:40px;
  background:rgba(255,255,255,.13);
  border:1px solid rgba(255,255,255,.24);
  box-shadow:inset 0 0 0 14px rgba(255,255,255,.04),0 18px 40px rgba(0,0,0,.12);
  transform:rotate(-8deg);
  display:grid;place-items:center;
  font-size:58px;font-weight:900;
}
.student-stats,.admin-stat-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:14px;
  margin:0 0 30px;
}
.student-stat,.admin-stat{
  min-height:104px;
  display:flex;
  align-items:center;
  gap:15px;
  padding:18px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:18px;
  box-shadow:var(--shadow-sm);
}
.stat-icon{
  flex:0 0 48px;width:48px;height:48px;border-radius:15px;
  display:grid;place-items:center;
  background:var(--primary-soft);color:var(--primary);
  font-size:21px;font-weight:900;
}
.stat-icon.teal{background:var(--teal-soft);color:var(--teal)}
.stat-icon.green{background:var(--success-soft);color:var(--success)}
.stat-icon.purple{background:#f1edff;color:var(--purple)}
.student-stat b,.admin-stat b{display:block;font-size:26px;color:var(--navy);line-height:1.1}
.student-stat small,.admin-stat small{display:block;color:var(--muted);margin-top:5px}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;
  margin:28px 0 15px;
}
.section-head h2{margin:0}.section-head p{margin:4px 0 0;color:var(--muted)}
.section-link{font-weight:850;display:inline-flex;align-items:center;gap:7px}
.section-link::after{content:"←"}
.cards.exam-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:0}
.exam-card-v3{
  min-height:355px;
  padding:0!important;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  border:1px solid var(--border)!important;
  border-radius:21px!important;
  box-shadow:var(--shadow-sm);
  background:#fff;
}
.exam-card-v3:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c5d4e8!important}
.exam-card-cover{
  min-height:104px;
  padding:21px;
  background:linear-gradient(135deg,#edf4ff,#ecfaf8);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.exam-symbol{
  width:58px;height:58px;border-radius:18px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--teal));
  color:#fff;font-size:27px;font-weight:900;
  box-shadow:0 10px 25px rgba(29,78,216,.18)
}
.exam-card-content{padding:21px;display:flex;flex-direction:column;flex:1}
.exam-card-v3 h2{font-size:21px;line-height:1.5;margin:0 0 9px}
.exam-card-v3 p{margin:0 0 10px;color:var(--muted)}
.exam-card-v3 .card-badges{margin:0}
.badge,.status-pill{
  display:inline-flex;align-items:center;gap:5px;
  min-height:29px;padding:4px 10px;border-radius:999px;
  font-size:12px;font-weight:850;
}
.badge{background:#edf5ff;color:#2659a7}
.badge-assigned{background:#f0ebff!important;color:#6746bf!important}
.badge-public{background:var(--success-soft)!important;color:var(--success)!important}
.exam-meta-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:7px;
  margin:14px 0;
}
.exam-meta-grid span{padding:9px 7px;text-align:center;background:var(--surface-2);border:1px solid #edf1f6;border-radius:11px;color:#53627a;font-size:13px}
.exam-card-actions{margin-top:auto;padding-top:14px;display:flex;gap:9px}
.exam-card-actions .primary{width:100%}
.schedule-line{padding:9px 11px;background:var(--warning-soft);border-radius:10px;color:#805b00;font-size:13px}
.student-bottom-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(300px,.65fr);gap:18px;margin-top:28px}
.panel-card{background:#fff;border:1px solid var(--border);border-radius:20px;padding:21px;box-shadow:var(--shadow-sm)}
.quick-review-card{min-height:235px;background:linear-gradient(150deg,#fff,#f5f2ff)}
.quick-review-card .big-icon{width:64px;height:64px;border-radius:20px;display:grid;place-items:center;background:#eee8ff;color:var(--purple);font-size:28px;margin-bottom:20px}
.quick-review-card h3{font-size:23px;margin:0 0 8px}.quick-review-card p{color:var(--muted)}

/* Tables */
.table{
  overflow:auto;
  background:#fff;
  border:1px solid var(--border);
  border-radius:16px;
  margin-top:15px;
  box-shadow:0 2px 10px rgba(27,47,86,.025);
}
table{width:100%;border-collapse:separate;border-spacing:0}
th,td{padding:14px 16px;border-bottom:1px solid #e8eef6;text-align:right;white-space:nowrap;vertical-align:middle}
th{background:#f7f9fc;color:#53627a;font-size:13px;font-weight:900;position:sticky;top:0;z-index:1}
tr:last-child td{border-bottom:0}
tbody tr:hover td,table tr:not(:first-child):hover td{background:#fbfdff}
td small.block{color:var(--muted);font-size:12px;margin-top:3px}
.row-actions{display:flex;align-items:center;gap:8px;flex-wrap:nowrap}
.row-actions a,.row-actions button{white-space:nowrap}

/* Administration */
.admin-page .page-title-row{margin-bottom:20px}
.admin-page .stats.stats-v3{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:14px;
  margin:0 0 20px;
}
.admin-page .stats.stats-v3>div{
  min-height:112px;
  border-radius:18px;
  border:1px solid var(--border);
  background:#fff;
  box-shadow:var(--shadow-sm);
  padding:19px;
  text-align:right;
  position:relative;
  overflow:hidden;
}
.admin-page .stats.stats-v3>div::after{content:"";position:absolute;width:62px;height:62px;border-radius:18px;left:15px;top:18px;background:var(--primary-soft)}
.admin-page .stats.stats-v3>div:nth-child(2)::after{background:var(--teal-soft)}
.admin-page .stats.stats-v3>div:nth-child(3)::after{background:var(--success-soft)}
.admin-page .stats.stats-v3>div:nth-child(4)::after{background:#f1edff}
.admin-page .stats.stats-v3 b{font-size:31px;color:var(--navy);position:relative;z-index:1}
.admin-page .stats.stats-v3 span{display:block;color:var(--muted);font-size:14px;position:relative;z-index:1}
.admin-section{
  background:#fff;
  border:1px solid var(--border);
  border-radius:21px;
  padding:23px;
  margin:18px 0;
  box-shadow:var(--shadow-sm);
}
.admin-section>h2,.admin-section>.section-title{padding-bottom:15px;border-bottom:1px solid #edf1f6;margin-bottom:16px}
.section-title{display:flex;align-items:center;justify-content:space-between;gap:14px}
.section-title h2{margin:0}
.inline-settings{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:4px 0}
.switch-line{display:flex;align-items:center;gap:10px;font-weight:850}
.switch-line input,.checks input{width:19px;height:19px;min-height:0;accent-color:var(--primary)}
.editor{
  background:#fbfcfe;
  border:1px solid var(--border);
  border-radius:15px;
  padding:0;
  overflow:hidden;
}
.editor summary{
  min-height:60px;
  padding:16px 18px;
  display:flex;
  align-items:center;
  font-weight:900;
  color:var(--navy);
  cursor:pointer;
  background:#fff;
  list-style:none;
}
.editor summary::-webkit-details-marker{display:none}
.editor summary::before{content:"＋";width:32px;height:32px;border-radius:10px;margin-left:10px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary)}
.editor[open] summary{border-bottom:1px solid var(--border)}
.editor[open] summary::before{content:"−"}
.editor .grid-form{padding:20px}
.grid-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px 18px;margin:0}
.grid-form label{display:grid;gap:7px;margin:0}
.grid-form .wide{grid-column:1/-1}
.grid-form .checks{display:flex!important;align-items:center;gap:20px!important;flex-wrap:wrap;background:#fff;border:1px solid var(--border);padding:13px;border-radius:12px}
.filter-bar{
  display:flex;
  align-items:end;
  gap:10px;
  flex-wrap:wrap;
  padding:14px;
  border:1px solid var(--border);
  border-radius:14px;
  background:#f8fafc;
  margin-top:14px;
}
.filter-bar input,.filter-bar select{min-width:170px;background:#fff}
.filter-bar label{display:grid;gap:5px;margin:0}
.recipient-box{border:1px solid var(--border);border-radius:15px;padding:16px;background:#fff}
.recipient-box legend{font-weight:900;color:var(--navy);padding:0 9px}
.check-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.check-grid>label{display:flex;align-items:flex-start;gap:10px;border:1px solid var(--border);border-radius:13px;padding:12px;margin:0;background:#fff;cursor:pointer}
.check-grid>label:hover{border-color:#adc1df;background:#f8fbff}
.check-grid>label input{width:18px;min-height:18px;margin-top:3px;accent-color:var(--primary)}
.check-grid small{display:block;color:var(--muted);font-weight:500;margin-top:2px}
.form-actions{display:flex;align-items:center;gap:10px;margin-top:5px}
.status-pill{background:var(--primary-soft);color:var(--primary)}
.pagination{display:flex;gap:7px;justify-content:center;flex-wrap:wrap;margin:20px 0 0}
.pagination a{display:grid;place-items:center;min-width:38px;height:38px;border:1px solid var(--border);border-radius:10px;background:#fff;font-weight:800}
.pagination a.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.empty-state{padding:42px 25px;border:1px dashed #b8c8dd;background:#f8fafc;border-radius:17px;text-align:center;color:var(--muted);font-weight:700}

/* Result page */
.result-page .container.result,.saved-page .container.result{max-width:1240px}
.result-heading{align-items:center}
.result-actions{display:flex;gap:9px;flex-wrap:wrap;position:relative;z-index:2}
.score-dashboard{
  display:grid;
  grid-template-columns:1.25fr repeat(4,minmax(0,1fr));
  gap:14px;
  margin:20px 0 30px;
}
.score-ring,.result-stat{
  min-height:132px;
  border:1px solid var(--border);
  background:#fff;
  border-radius:20px;
  padding:20px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  text-align:center;
  box-shadow:var(--shadow-sm);
}
.score-ring{
  min-height:175px;
  background:linear-gradient(145deg,#eff5ff,#f8fbff);
  position:relative;
  overflow:hidden;
}
.score-ring::before{
  content:"";
  width:116px;height:116px;border-radius:50%;
  background:conic-gradient(var(--teal) var(--score,0%),#dfe8f4 0);
  -webkit-mask:radial-gradient(circle,#0000 58%,#000 60%);
  mask:radial-gradient(circle,#0000 58%,#000 60%);
  position:absolute;
}
.score-ring b{font-size:35px;color:var(--navy);z-index:1}
.score-ring span{z-index:1}
.result-stat b{font-size:25px;color:var(--navy);line-height:1.25}
.result-stat span,.score-ring span{color:var(--muted);margin-top:7px}
.result-section{
  margin:22px 0;
  padding:23px;
  border:1px solid var(--border);
  background:#fff;
  border-radius:21px;
  box-shadow:var(--shadow-sm);
}
.category-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.category-stats article{border:1px solid var(--border);border-radius:15px;padding:16px;background:#fbfcfe}
.category-stats article>b{display:block;color:var(--navy);font-size:16px}.category-stats article>span,.category-stats article>small{display:block;color:var(--muted);margin-top:4px}
.mini-progress{height:8px;background:#e8eef6;border-radius:999px;overflow:hidden;margin-top:14px}.mini-progress i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--primary),var(--teal))}
.review-toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:4px 0 18px;padding:10px;background:#f8fafc;border-radius:13px}
.review-filter{border:1px solid var(--border);background:#fff;color:#52617a;padding:8px 13px;border-radius:10px;font-weight:850}
.review-filter.active{background:var(--navy);border-color:var(--navy);color:#fff}
.answer{
  background:#fff;
  border:1px solid var(--border);
  border-right:5px solid var(--danger);
  padding:19px;
  border-radius:16px;
  margin:13px 0;
  line-height:1.8;
  box-shadow:0 4px 15px rgba(27,47,86,.045);
}
.answer:hover{box-shadow:0 10px 28px rgba(27,47,86,.08)}
.answer.correct{border-right-color:var(--success)}
.answer.unanswered{border-right-color:var(--warning)}
.answer-title-row{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}
.answer-title-row>b{font-size:17px;color:var(--navy);line-height:1.7}
.answer-meta{display:flex;gap:7px;flex-wrap:wrap;margin:10px 0 14px}.answer-meta span{background:#f0f4fa;color:#53627a;border-radius:999px;padding:4px 9px;font-size:12px;font-weight:700}
.answer-choice{padding:10px 13px;border-radius:11px;background:#f8fafc;margin:8px 0}.answer-choice.correct-choice{background:var(--success-soft);color:var(--success)}
.save-question{min-height:38px;padding:7px 12px;border:1px solid #d5c57d;border-radius:10px;background:#fffdf2;color:#765d00;font-weight:850;white-space:nowrap}
.save-question.saved{background:#fff5c9;border-color:#e0bb31}
.review-passage{margin:12px 0;border:1px solid var(--border);border-radius:12px;padding:0;background:#fbfcfe;overflow:hidden}.review-passage summary{font-weight:850;cursor:pointer;padding:11px 13px}.review-passage p{line-height:2;padding:0 13px 13px}
.explanation{margin-top:13px;padding:13px 15px;border-radius:12px;background:#f2f6ff;border-right:3px solid var(--primary);line-height:1.9}
.green{color:var(--success)}

/* Saved library */
.saved-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px;margin:0 0 18px}
.saved-summary>div{padding:17px;background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-sm)}
.saved-summary b{display:block;font-size:25px;color:var(--navy)}.saved-summary span{color:var(--muted)}
.saved-filterbar{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:10px;padding:14px;background:#fff;border:1px solid var(--border);border-radius:16px;margin-bottom:18px}
.saved-answer{margin-bottom:15px}
.saved-note{margin-top:16px;padding-top:16px;border-top:1px solid var(--border)}
.saved-note label{display:grid;gap:7px}
.saved-note textarea{min-height:90px}

/* Exam experience */
.exam-page-v3{background:#eef3f9;min-height:100vh}
.exam-page-v3 .top{position:sticky;top:0;min-height:72px;background:#fff}
.exam-page-v3 .top>b{font-size:18px;max-width:70%;overflow:hidden;text-overflow:ellipsis}
.exam-page-v3 .top>b::before{content:"✓"}
.timer{padding:9px 15px;border-radius:12px;background:var(--danger-soft);color:#a52837;border:1px solid #ffd3d8;font-size:18px;font-weight:900;min-width:120px;text-align:center}
.exam-shell{
  max-width:1400px;
  min-height:calc(100vh - 106px);
  margin:18px auto;
  padding:0 18px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:18px;
}
.exam-panel,.side{background:#fff;border:1px solid var(--border);border-radius:21px;box-shadow:var(--shadow-sm)}
.exam-panel{display:flex;flex-direction:column;min-height:calc(100vh - 112px);overflow:hidden}
.exam-head{padding:16px 22px;display:flex;justify-content:space-between;align-items:center;background:#fbfcfe;border-bottom:1px solid var(--border)}
.exam-head span{font-weight:850;color:#53627a}.exam-head b{color:var(--teal);background:var(--teal-soft);padding:5px 10px;border-radius:999px}
.progress{height:7px;background:#e7edf5}.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--teal));border-radius:99px}
.exam-body{padding:28px 30px;flex:1;overflow:auto}
.exam-body h2{font-size:23px;line-height:1.8;margin:20px 0;color:var(--navy)}
.passage{background:#f8fafc;border:1px solid var(--border);border-right:5px solid var(--teal);padding:18px;line-height:2.1;border-radius:14px;max-height:300px;overflow:auto;white-space:pre-line}
.option{
  width:100%;
  min-height:64px;
  display:flex;
  gap:14px;
  align-items:center;
  text-align:right;
  padding:12px 15px;
  margin:10px 0;
  border:1.5px solid var(--border-strong);
  border-radius:14px;
  background:#fff;
  color:var(--ink);
  box-shadow:none;
}
.option:hover{border-color:#8aa8df;background:#f8fbff;transform:translateX(-2px)}
.option i{font-style:normal;flex:0 0 40px;width:40px;height:40px;border-radius:12px;background:#eef2f7;display:grid;place-items:center;font-weight:900;color:#4b5c75}
.option span{white-space:normal;text-align:right;line-height:1.75}
.option.selected{border-color:var(--primary);background:var(--primary-soft);box-shadow:0 0 0 3px rgba(37,99,235,.07)}
.option.selected i{background:var(--primary);color:#fff}
.exam-panel footer{border-top:1px solid var(--border);padding:15px 20px;display:flex;justify-content:space-between;gap:10px;background:#fbfcfe;position:sticky;bottom:0}
.exam-panel footer button{min-width:130px}
.exam-panel footer .primary{box-shadow:none}
.marked{background:var(--warning-soft)!important;color:#886000!important;border-color:#efcc68!important;box-shadow:none!important}
.side{padding:20px;align-self:start;position:sticky;top:94px}
.side h3{margin:0 0 5px;font-size:20px}
.legend-mini{display:flex;gap:10px;font-size:12px;color:var(--muted);margin-bottom:12px}.answered-dot::before,.review-dot::before{content:"";display:inline-block;width:9px;height:9px;border-radius:50%;margin-left:5px;background:var(--primary)}.review-dot::before{background:#eab308}
.exam-counts{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:12px 0}
.exam-counts>div{padding:9px;border-radius:10px;background:#f8fafc;text-align:center}.exam-counts b{display:block;color:var(--navy)}.exam-counts small{color:var(--muted)}
.nums{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin:12px 0 20px;max-height:48vh;overflow:auto;padding:3px}
.nums button{height:39px;border:1px solid var(--border);background:#fff;border-radius:10px;color:#53627a;font-weight:850}
.nums .answered{background:var(--primary);border-color:var(--primary);color:#fff}.nums .current{outline:3px solid rgba(37,99,235,.22)}.nums .marked{box-shadow:inset 0 -4px 0 #eab308!important}
.side .submit{width:100%;background:linear-gradient(135deg,#d6394c,#ee6c58);box-shadow:0 8px 20px rgba(210,63,80,.16)}
.toast{position:fixed;left:22px;bottom:22px;background:var(--navy);color:#fff;padding:10px 17px;border-radius:11px;opacity:0;transform:translateY(8px);transition:.2s}.toast.show{opacity:1;transform:translateY(0)}

/* Authentication */
.auth-page{
  min-height:100vh;
  padding:24px;
  display:grid;
  place-items:center;
  background:
    radial-gradient(circle at 90% 5%,rgba(37,99,235,.16),transparent 33%),
    radial-gradient(circle at 0 95%,rgba(15,159,154,.15),transparent 30%),
    #f3f6fb;
}
.auth-layout{
  width:min(1040px,100%);
  min-height:620px;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  background:#fff;
  border:1px solid var(--border);
  border-radius:28px;
  overflow:hidden;
  box-shadow:0 28px 80px rgba(18,42,86,.16);
}
.auth-visual{
  padding:48px;
  color:#fff;
  background:linear-gradient(145deg,#0d2f67,#1d4ed8 55%,#0f9f9a);
  position:relative;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.auth-visual::before,.auth-visual::after{content:"";position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,.18)}
.auth-visual::before{width:330px;height:330px;left:-110px;top:-130px}.auth-visual::after{width:240px;height:240px;right:-130px;bottom:-80px}
.auth-visual h2{font-size:38px;color:#fff;margin:0 0 13px}.auth-visual p{color:rgba(255,255,255,.82);font-size:17px;max-width:440px}.auth-visual .visual-card{margin-top:32px;padding:20px;border:1px solid rgba(255,255,255,.18);border-radius:18px;background:rgba(255,255,255,.10);backdrop-filter:blur(8px)}
.auth{
  width:auto;
  background:#fff;
  padding:50px;
  border:0;
  border-radius:0;
  box-shadow:none;
  text-align:right;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.auth .logo{margin:0 0 18px;width:54px;height:54px;border-radius:16px}.auth h1{font-size:31px}.auth>p{color:var(--muted);margin-top:0}.auth label{display:grid;gap:7px;text-align:right;margin:13px 0}.auth .primary{width:100%;margin:12px 0}.auth>a{text-align:center;font-weight:800;margin-top:8px}

/* Mobile */
@media(max-width:1100px){
  .cards.exam-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .student-stats,.admin-page .stats.stats-v3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .student-bottom-grid{grid-template-columns:1fr}
  .score-dashboard{grid-template-columns:repeat(2,minmax(0,1fr))}.score-ring{grid-column:span 2}
  .category-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .check-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .exam-shell{grid-template-columns:minmax(0,1fr) 250px}
}
@media(max-width:820px){
  body{font-size:15px}
  .top{padding:10px 14px;align-items:flex-start;flex-direction:column;position:relative}
  .top>b{font-size:19px}.top>b::before{width:34px;height:34px}
  .top nav,.admin-nav{width:100%;overflow:auto;flex-wrap:nowrap;padding-bottom:2px}.top nav a,.top nav span,.admin-nav a{white-space:nowrap;padding:7px 10px}
  .container{margin:20px auto;padding:0 13px}
  .page-title-row,.result-heading{padding:21px;align-items:flex-start;flex-direction:column}
  .dashboard-hero{grid-template-columns:1fr;padding:27px;min-height:260px}.hero-visual{display:none}
  .cards.exam-grid{grid-template-columns:1fr}.exam-card-v3{min-height:auto}
  .student-stats,.admin-page .stats.stats-v3,.saved-summary{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-form{grid-template-columns:1fr}.grid-form .wide{grid-column:auto}
  .check-grid{grid-template-columns:1fr}
  .filter-bar>*{width:100%;min-width:0!important}
  .inline-settings{align-items:stretch;flex-direction:column}
  .admin-section{padding:15px}.section-title{align-items:flex-start}
  .score-dashboard,.category-stats{grid-template-columns:1fr}.score-ring{grid-column:auto}
  .answer-title-row{flex-direction:column}
  .saved-filterbar{grid-template-columns:1fr}
  .exam-shell{grid-template-columns:1fr;margin:10px auto;padding:0 10px}.side{position:static;order:-1;padding:14px}.side h3,.legend-mini{display:none}.nums{grid-template-columns:repeat(10,minmax(32px,1fr));max-height:130px}.exam-panel{min-height:auto}.exam-body{padding:20px}.exam-panel footer{position:sticky;bottom:0}.exam-panel footer button{min-width:0;flex:1}
  .auth-layout{grid-template-columns:1fr;min-height:auto}.auth-visual{display:none}.auth{padding:32px 24px}
}
@media(max-width:520px){
  h1{font-size:27px}h2{font-size:21px}
  .student-stats,.admin-page .stats.stats-v3,.saved-summary{grid-template-columns:1fr 1fr;gap:9px}.student-stat,.admin-stat{min-height:88px;padding:13px}.stat-icon{width:40px;height:40px;flex-basis:40px}.student-stat b,.admin-stat b{font-size:21px}
  .exam-meta-grid{grid-template-columns:1fr 1fr}.exam-meta-grid span:last-child{grid-column:1/-1}
  .panel-card,.result-section{padding:15px}
  .nums{grid-template-columns:repeat(6,1fr)}
  .exam-body h2{font-size:19px}.option{min-height:56px;padding:9px}.option i{width:35px;height:35px;flex-basis:35px}
  .result-actions{width:100%}.result-actions>*{flex:1;text-align:center}
  th,td{padding:12px 13px}
}
@media print{
  .print-hide,.top,.review-toolbar,.saved-filterbar{display:none!important}
  body{background:#fff!important}
  .container{max-width:none!important;padding:0!important;margin:0!important}
  .answer,.result-section,.score-dashboard{break-inside:avoid;box-shadow:none!important}
  .answer{border:1px solid #bbb!important}
}
.admin-page .container.result{max-width:1240px}
.admin-page .score-ring{--score:0}
.group-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.group-card{border:1px solid var(--border);border-radius:18px;padding:18px;background:linear-gradient(145deg,#fff,#fbfcff);box-shadow:var(--shadow-sm)}.group-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}.group-card-head{display:flex;align-items:center;justify-content:space-between}.group-avatar{width:48px;height:48px;border-radius:15px;display:grid;place-items:center;background:#f1edff;color:var(--purple);font-size:20px}.group-card h3{margin:15px 0 6px;font-size:21px}.group-card p{color:var(--muted);min-height:52px}.group-members{display:flex;align-items:baseline;gap:7px;padding:12px;border-radius:12px;background:#f7f9fc}.group-members b{font-size:24px;color:var(--navy)}.group-members span{color:var(--muted)}.group-actions{display:flex;gap:8px;margin-top:14px}.group-actions .primary{flex:1;min-height:40px;padding:8px 13px}.group-actions form{margin:0}@media(max-width:1000px){.group-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:700px){.group-card-grid{grid-template-columns:1fr}}
.form-step-title{display:flex;align-items:center;gap:12px;padding:13px 15px;margin-top:5px;border-radius:14px;background:linear-gradient(135deg,var(--primary-soft),#f9fbff);border:1px solid #dce7fb}.form-step-title>span{width:36px;height:36px;flex:0 0 36px;border-radius:12px;display:grid;place-items:center;background:var(--primary);color:#fff;font-weight:900}.form-step-title b{display:block;color:var(--navy)}.form-step-title small{display:block;color:var(--muted);font-weight:500;margin-top:2px}
.admin-quick-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:20px}.admin-quick-grid>a{display:flex;align-items:center;gap:12px;padding:16px;background:#fff;border:1px solid var(--border);border-radius:17px;box-shadow:var(--shadow-sm);color:var(--ink)}.admin-quick-grid>a:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#c4d3e7}.admin-quick-grid>a>span{width:43px;height:43px;flex:0 0 43px;border-radius:14px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary);font-size:19px;font-weight:900}.admin-quick-grid b{display:block;color:var(--navy)}.admin-quick-grid small{display:block;color:var(--muted);font-weight:500;margin-top:2px}@media(max-width:1000px){.admin-quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:560px){.admin-quick-grid{grid-template-columns:1fr}}