/* =========================================================
   MAHIN'S CLASSROOM — design system
   Signature idea: real board-exam artefacts — OMR bubble
   answers, admit-card perforated edges, roll-number chips.
   ========================================================= */

@font-face {
  font-family: 'SolaimanLipi';
  src: url('https://cdn.jsdelivr.net/gh/mirazmac/bengali-webfont-cdn@master/solaimanlipi/SolaimanLipiNormal.woff') format('woff');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'SutonnyMJ';
  src: url('https://db.onlinewebfonts.com/t/745d8457da8dec2e3477d0d4da431299.woff2') format('woff2'),
       url('https://db.onlinewebfonts.com/t/745d8457da8dec2e3477d0d4da431299.woff') format('woff');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&display=swap');

:root{
  --ink:        #16241F;
  --ink-soft:   #43554C;
  --paper:      #F6F3E9;
  --paper-deep: #EDE8D8;
  --card:       #FFFFFF;
  --border:     #DCD5C0;
  --green-deep: #0B4F3F;
  --green-mid:  #157A5C;
  --green-soft: #E4EFE9;
  --amber:      #D99A2B;
  --amber-soft: #FBF0DA;
  --correct:    #1E8E5A;
  --correct-soft:#E4F5EA;
  --wrong:      #C0432B;
  --wrong-soft: #FBE7E2;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-card: 0 2px 10px rgba(11,79,63,0.06), 0 1px 2px rgba(11,79,63,0.08);
  --shadow-pop: 0 20px 60px rgba(11,79,63,0.25);
  --font-bn: 'SolaimanLipi', 'Noto Sans Bengali', sans-serif;
  --font-en: 'SolaimanLipi', sans-serif;
}

/* ---------- dark theme ---------- */
[data-theme="dark"]{
  --ink:        #E9EEEA;
  --ink-soft:   #9FB0A6;
  --paper:      #101A16;
  --paper-deep: #17231D;
  --card:       #17231D;
  --border:     #283A30;
  --green-deep: #0B4F3F;
  --green-mid:  #2BBE8C;
  --green-soft: #16302A;
  --amber:      #E7B558;
  --amber-soft: #3A2C15;
  --correct:    #3AD196;
  --correct-soft:#123527;
  --wrong:      #EB6D57;
  --wrong-soft: #3B1B15;
  --shadow-card: 0 2px 10px rgba(0,0,0,.45), 0 1px 2px rgba(0,0,0,.5);
  --shadow-pop: 0 20px 60px rgba(0,0,0,.6);
}
[data-theme="dark"] body{ background:var(--paper); }
[data-theme="dark"] .btn-google{ background:#fff; color:#3c4043; border-color:#dadce0; }
[data-theme="dark"] .course-banner{ background:var(--paper-deep); }

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-bn);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  transition:background .2s ease, color .2s ease;
}
h1,h2,h3,h4{ font-family:var(--font-bn); margin:0 0 .4em; line-height:1.35; color:var(--ink); }
p{ margin:0 0 1em; color:var(--ink-soft); }
a{ color:inherit; text-decoration:none; }
button, input, select, textarea{ font-family:var(--font-bn); font-size:1em; }
img{ max-width:100%; display:block; }
.num, .eng{ font-family:var(--font-en); }
::selection{ background:var(--amber-soft); color:var(--ink); }
:focus-visible{ outline:3px solid var(--amber); outline-offset:2px; }

/* ---------- layout shell ---------- */
.shell{ max-width:1080px; margin:0 auto; padding:0 20px; }
.shell-narrow{ max-width:760px; margin:0 auto; padding:0 20px; }

/* ---------- top nav ---------- */
.topnav{
  position:sticky; top:0; z-index:40;
  background:var(--green-deep);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.topnav-inner{
  max-width:1080px; margin:0 auto; padding:12px 20px;
  display:flex; align-items:center; justify-content:space-between; gap:16px;
}
.brand{ display:flex; align-items:center; gap:10px; color:#fff; }
.brand-mark{
  width:38px; height:38px; border-radius:10px;
  background:var(--amber); color:var(--green-deep);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--font-en); font-weight:800; font-size:16px;
  flex:none;
}
.brand-text{ display:flex; flex-direction:column; line-height:1.15; }
.brand-text b{ font-family:var(--font-en); font-weight:700; font-size:15.5px; letter-spacing:.2px; }
.brand-text span{ font-family:var(--font-bn); font-size:12.5px; color:#CFE3DA; }

.nav-links{ display:flex; align-items:center; gap:4px; flex-wrap:wrap; }
.nav-links a{
  color:#DCEAE3; padding:8px 12px; border-radius:999px; font-size:14.5px;
  transition:background .15s, color .15s;
}
.nav-links a:hover{ background:rgba(255,255,255,.1); color:#fff; }
.nav-links a.active{ background:var(--amber); color:var(--green-deep); font-weight:600; }

.nav-toggle{ display:none; background:none; border:0; color:#fff; font-size:22px; cursor:pointer; }

/* ---------- account switch (login / profile / logout) ---------- */
.account-switch{ position:relative; flex:none; }
.account-btn{
  width:36px; height:36px; border-radius:50%; border:2px solid var(--amber);
  background:rgba(255,255,255,.08); color:#fff; cursor:pointer; padding:0; overflow:hidden;
  display:flex; align-items:center; justify-content:center; font-size:19px;
}
.account-btn:hover{ background:rgba(255,255,255,.18); }
.account-btn img{ width:100%; height:100%; object-fit:cover; border-radius:50%; }
.account-menu{
  position:absolute; top:calc(100% + 10px); right:0; background:var(--card); border:1px solid var(--border);
  border-radius:12px; box-shadow:var(--shadow-pop); padding:6px; min-width:172px; display:none; z-index:55;
}
.account-menu.open{ display:block; }
.account-menu-name{
  padding:8px 11px 7px; font-size:13px; font-weight:600; color:var(--ink);
  border-bottom:1px solid var(--border); margin-bottom:4px; word-break:break-word;
}
.account-menu a, .account-menu button{
  display:flex; align-items:center; gap:10px; width:100%; text-align:left; padding:9px 11px; border-radius:8px;
  border:none; background:none; cursor:pointer; font-size:13.5px; color:var(--ink); font-family:var(--font-bn);
}
.account-menu a:hover, .account-menu button:hover{ background:var(--paper); }
.account-menu i{ width:16px; text-align:center; }

/* ---------- theme switcher ---------- */
.theme-switch{ position:relative; flex:none; }
.theme-btn{
  width:36px; height:36px; border-radius:50%; border:1px solid rgba(255,255,255,.28);
  background:rgba(255,255,255,.08); color:#fff; cursor:pointer; display:flex; align-items:center; justify-content:center; font-size:14px;
}
.theme-btn:hover{ background:rgba(255,255,255,.18); }
.theme-menu{
  position:absolute; top:calc(100% + 10px); right:0; background:var(--card); border:1px solid var(--border);
  border-radius:12px; box-shadow:var(--shadow-pop); padding:6px; min-width:158px; display:none; z-index:55;
}
.theme-menu.open{ display:block; }
.theme-menu button{
  display:flex; align-items:center; gap:10px; width:100%; text-align:left; padding:9px 11px; border-radius:8px;
  border:none; background:none; cursor:pointer; font-size:13.5px; color:var(--ink); font-family:var(--font-bn);
}
.theme-menu button:hover{ background:var(--paper); }
.theme-menu button.active{ background:var(--green-soft); color:var(--green-deep); font-weight:600; }
.theme-menu button i{ width:16px; text-align:center; }

@media (max-width: 860px){
  .nav-links{
    position:absolute; top:100%; left:0; right:0; background:var(--green-deep);
    flex-direction:column; align-items:stretch; padding:8px 14px 14px; gap:2px;
    display:none; box-shadow:0 12px 24px rgba(0,0,0,.2);
  }
  .nav-links.open{ display:flex; }
  .nav-links a{ padding:10px 12px; }
  .nav-toggle{ display:block; }
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:12px 22px; border-radius:999px; border:1px solid transparent;
  font-weight:600; font-size:15px; cursor:pointer; transition:transform .12s, box-shadow .12s, background .15s;
  font-family:var(--font-bn);
}
.btn:active{ transform:scale(.97); }
.btn-primary{ background:var(--green-mid); color:#fff; box-shadow:0 6px 16px rgba(21,122,92,.28); }
.btn-primary:hover{ background:var(--green-deep); }
.btn-amber{ background:var(--amber); color:var(--green-deep); box-shadow:0 6px 16px rgba(217,154,43,.3); }
.btn-amber:hover{ filter:brightness(1.05); }
.btn-outline{ background:transparent; border-color:var(--border); color:var(--ink); }
.btn-outline:hover{ border-color:var(--green-mid); color:var(--green-mid); }
.btn-danger{ background:var(--wrong-soft); color:var(--wrong); }
.btn-danger:hover{ background:var(--wrong); color:#fff; }
.btn-sm{ padding:8px 14px; font-size:13.5px; }
.btn-block{ width:100%; }
.btn[disabled]{ opacity:.5; cursor:not-allowed; }

.btn-google{
  display:flex; align-items:center; justify-content:center; gap:10px;
  background:#fff; color:#3c4043; border:1px solid #dadce0;
  padding:13px 22px; border-radius:10px; font-weight:600; cursor:pointer; width:100%;
  font-family:var(--font-en); font-size:15px;
}
.btn-google:hover{ box-shadow:0 2px 10px rgba(0,0,0,.12); }

/* ---------- cards ---------- */
.card{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card); padding:28px;
}
.card-pad-sm{ padding:18px; }

/* admit-card / perforated style */
.admit-card{
  position:relative; background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius-lg); box-shadow:var(--shadow-card);
  padding:26px; overflow:hidden;
}
.admit-card::before{
  content:""; position:absolute; left:0; right:0; top:0; height:6px;
  background:repeating-linear-gradient(90deg, var(--green-mid) 0 14px, transparent 14px 22px);
}

/* ---------- profile card ---------- */
.profile-card{
  position:relative; background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius-lg); box-shadow:var(--shadow-card); padding:32px 26px; text-align:center;
}
.profile-edit-btn{
  position:absolute; top:18px; right:18px; width:38px; height:38px; border-radius:50%;
  border:1px solid var(--border); background:var(--paper); color:var(--ink); cursor:pointer; font-size:14px;
}
.profile-edit-btn:hover{ border-color:var(--green-mid); color:var(--green-mid); }
.avatar-lg{
  width:88px; height:88px; border-radius:50%; border:3px solid var(--amber);
  object-fit:cover; margin:0 auto 14px; display:block; background:var(--paper-deep);
}
.profile-card h2{ font-size:19px; margin-bottom:2px; }
.profile-card .email{ font-size:13.5px; color:var(--ink-soft); margin-bottom:24px; }
.profile-info-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:12px; text-align:left; }
@media (max-width:560px){ .profile-info-grid{ grid-template-columns:1fr; } }
.profile-info-item{ background:var(--paper); border-radius:12px; padding:14px; }
.profile-info-item .lbl{ font-size:12px; color:var(--ink-soft); margin-bottom:5px; display:flex; align-items:center; gap:6px; }
.profile-info-item .val{ font-weight:700; font-size:14.5px; }

/* ---------- hero (home) ---------- */
.hero{ padding:34px 0 20px; }
@media (max-width:760px){ .hero{ padding:22px 0 12px; } }
.hero-grid{ display:grid; grid-template-columns:1.15fr .85fr; gap:40px; align-items:center; }
@media (max-width:860px){ .hero-grid{ grid-template-columns:1fr; } }
.eyebrow{
  display:inline-flex; align-items:center; gap:8px; background:var(--green-soft); color:var(--green-deep);
  padding:6px 14px; border-radius:999px; font-size:13px; font-weight:600; margin-bottom:16px;
}
.hero h1{ font-size:clamp(28px,4.4vw,44px); font-weight:700; }
.hero .accent{ color:var(--green-mid); }
.hero-actions{ display:flex; gap:12px; margin-top:26px; flex-wrap:wrap; }
.hero-stats{ display:flex; gap:26px; margin-top:34px; flex-wrap:wrap; }
.hero-stats div b{ display:block; font-family:var(--font-en); font-size:24px; color:var(--green-deep); }
.hero-stats div span{ font-size:13px; color:var(--ink-soft); }

/* OMR sheet illustration */
.omr-art{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card); padding:22px;
}
.omr-art .omr-title{ font-family:var(--font-en); font-size:12px; letter-spacing:1.5px; color:var(--ink-soft); text-transform:uppercase; margin-bottom:14px; }
.omr-row{ display:flex; align-items:center; gap:10px; margin-bottom:9px; }
.omr-row .qn{ font-family:var(--font-en); font-size:12px; color:var(--ink-soft); width:18px; }
.omr-bubble-mini{
  width:17px; height:17px; border-radius:50%; border:1.6px solid var(--ink-soft); opacity:.55; flex:none;
}
.omr-bubble-mini.on{ background:var(--green-mid); border-color:var(--green-mid); opacity:1; }
.omr-bubble-mini.on.wrongfill{ background:var(--wrong); border-color:var(--wrong); }

/* ---------- feature grid ---------- */
.section{ padding:34px 0; }
.section-head{ text-align:center; max-width:560px; margin:0 auto 30px; }
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
@media (max-width:760px){ .grid-3{ grid-template-columns:1fr; } }
.feature{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius-md); padding:22px;
}
.feature .ico{
  width:42px; height:42px; border-radius:12px; background:var(--green-soft); color:var(--green-deep);
  display:flex; align-items:center; justify-content:center; font-size:20px; margin-bottom:12px;
}
.feature h3{ font-size:17px; }
.feature p{ font-size:14.5px; margin:0; }

/* ---------- exam list ---------- */
.exam-list{ display:grid; gap:14px; }
.exam-item{
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius-md);
  padding:18px 20px; flex-wrap:wrap;
}
.exam-item h3{ font-size:17px; margin-bottom:4px; }
.exam-meta{ display:flex; gap:14px; flex-wrap:wrap; font-size:13px; color:var(--ink-soft); }
.exam-meta span{ display:inline-flex; align-items:center; gap:5px; }
.chip{
  display:inline-flex; align-items:center; padding:4px 10px; border-radius:999px;
  background:var(--green-soft); color:var(--green-deep); font-size:12.5px; font-weight:600;
  font-family:var(--font-en);
}

/* ---------- forms ---------- */
.field{ margin-bottom:18px; }
.field label{ display:block; font-size:13.5px; font-weight:600; color:var(--ink); margin-bottom:6px; }
.field input[type=text], .field input[type=number], .field input[type=email],
.field select, .field textarea, .field input[type=file]{
  width:100%; padding:12px 14px; border:1.5px solid var(--border); border-radius:10px;
  background:#fff; color:var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus{ border-color:var(--green-mid); }
.radio-row{ display:flex; gap:10px; flex-wrap:wrap; }
.radio-pill{
  border:1.5px solid var(--border); border-radius:999px; padding:10px 18px; cursor:pointer;
  font-size:14px; user-select:none;
}
.radio-pill input{ display:none; }
.radio-pill.checked{ background:var(--green-mid); border-color:var(--green-mid); color:#fff; font-weight:600; }

/* ---------- exam runner ---------- */
.exam-top{
  position:sticky; top:0; z-index:30; background:var(--paper);
  border-bottom:1px solid var(--border); padding:12px 0;
}
.exam-top-inner{ display:flex; align-items:center; justify-content:space-between; gap:14px; flex-wrap:wrap; }
.timer{
  font-family:var(--font-en); font-weight:700; font-size:17px; color:var(--green-deep);
  background:var(--green-soft); padding:8px 16px; border-radius:999px; display:flex; align-items:center; gap:8px;
}
.timer.low{ color:var(--wrong); background:var(--wrong-soft); }
.progress-track{
  height:8px; background:var(--paper-deep); border-radius:999px; overflow:hidden; flex:1; min-width:120px;
}
.progress-fill{ height:100%; background:var(--green-mid); transition:width .25s; }

.qcard{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card); padding:28px; margin:22px 0;
  user-select:none; -webkit-user-select:none; -moz-user-select:none; -ms-user-select:none;
}
.qcard .qno{
  font-family:var(--font-en); font-weight:700; color:var(--green-deep); font-size:13px;
  background:var(--green-soft); display:inline-block; padding:4px 12px; border-radius:999px; margin-bottom:14px;
}
.qcard .qtext{ font-size:17.5px; margin-bottom:20px; }
.qcard .uddipok{
  background:var(--paper); border-left:4px solid var(--amber); border-radius:8px;
  padding:12px 16px; margin-bottom:16px; font-size:15.5px; color:var(--ink-soft);
}

.opt-list{ display:grid; gap:12px; }
.opt{
  display:flex; align-items:center; gap:14px; border:1.6px solid var(--border); border-radius:12px;
  padding:13px 16px; cursor:pointer; background:#fff; transition:border-color .15s, background .15s;
}
.opt:hover{ border-color:var(--green-mid); }
.opt-bubble{
  width:26px; height:26px; border-radius:50%; border:2px solid var(--ink-soft); flex:none;
  display:flex; align-items:center; justify-content:center; font-family:var(--font-en); font-weight:700; font-size:12px; color:var(--ink-soft);
}
.opt-label{ font-family:var(--font-en); font-weight:700; font-size:13px; color:var(--ink-soft); }
.opt-text{ flex:1; }
.opt.selected{ border-color:var(--green-mid); background:var(--green-soft); }
.opt.selected .opt-bubble{ background:var(--green-mid); border-color:var(--green-mid); color:#fff; }
.opt.locked{ cursor:not-allowed; }
.opt.locked:not(.selected){ opacity:.55; }

.exam-nav-actions{ display:flex; justify-content:space-between; gap:10px; margin:20px 0 60px; }

/* floating navigator trigger */
.nav-fab{
  position:fixed; right:20px; bottom:22px; z-index:45;
  background:var(--green-deep); color:#fff; border:none; border-radius:999px;
  padding:14px 20px; box-shadow:var(--shadow-pop); cursor:pointer; font-weight:600;
  display:flex; align-items:center; gap:9px; font-size:14.5px;
}
.nav-fab b{ font-family:var(--font-en); background:var(--amber); color:var(--green-deep); border-radius:999px; padding:2px 8px; font-size:12px; }

.modal-backdrop{
  position:fixed; inset:0; background:rgba(11,36,29,.55); z-index:60;
  display:none; align-items:flex-end; justify-content:center;
}
.modal-backdrop.open{ display:flex; }
@media (min-width:640px){ .modal-backdrop{ align-items:center; } }

.nav-popup{
  background:#fff; width:100%; max-width:420px; border-radius:22px 22px 0 0; padding:20px;
  max-height:78vh; overflow:auto; box-shadow:var(--shadow-pop);
}
@media (min-width:640px){ .nav-popup{ border-radius:22px; } }
.nav-popup-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:14px; }
.nav-popup-head h3{ font-size:16px; }
.nav-popup-close{ background:var(--paper); border:none; width:32px; height:32px; border-radius:50%; cursor:pointer; font-size:16px; }
.qgrid{ display:grid; grid-template-columns:repeat(6,1fr); gap:9px; margin-bottom:14px; }
.qgrid button{
  aspect-ratio:1; border-radius:10px; border:1.6px solid var(--border); background:#fff; cursor:pointer;
  font-family:var(--font-en); font-weight:700; font-size:13px; color:var(--ink-soft);
}
.qgrid button.answered{ background:var(--correct-soft); border-color:var(--correct); color:var(--correct); }
.qgrid button.current{ outline:2.5px solid var(--amber); outline-offset:1px; }
.nav-legend{ display:flex; gap:14px; flex-wrap:wrap; font-size:12.5px; color:var(--ink-soft); }
.nav-legend span{ display:inline-flex; align-items:center; gap:6px; }
.legend-dot{ width:10px; height:10px; border-radius:50%; display:inline-block; }

/* ---------- result page ---------- */
.result-hero{
  text-align:center; padding:34px 20px; border-radius:var(--radius-lg);
  background:var(--green-deep); color:#fff; position:relative; overflow:hidden;
}
.result-hero .score{ font-family:var(--font-en); font-weight:800; font-size:52px; }
.result-hero .out-of{ font-family:var(--font-en); font-size:16px; color:#CFE3DA; }
.result-stats{ display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin:22px 0; }
.stat-box{ background:var(--card); border:1px solid var(--border); border-radius:14px; padding:16px; text-align:center; }
.stat-box b{ display:block; font-family:var(--font-en); font-size:24px; }
.stat-box.correct b{ color:var(--correct); }
.stat-box.wrong b{ color:var(--wrong); }
.stat-box.skip b{ color:var(--ink-soft); }
.stat-box span{ font-size:12.5px; color:var(--ink-soft); }

.review-item{ border:1px solid var(--border); border-radius:14px; padding:18px; margin-bottom:14px; background:var(--card); }
.review-item .tag{ font-size:12px; font-family:var(--font-en); font-weight:700; padding:3px 10px; border-radius:999px; }
.tag.correct{ background:var(--correct-soft); color:var(--correct); }
.tag.wrong{ background:var(--wrong-soft); color:var(--wrong); }
.tag.skip{ background:var(--paper-deep); color:var(--ink-soft); }
.review-opts{ display:grid; gap:8px; margin-top:10px; }
.review-opt{ padding:9px 12px; border-radius:8px; border:1.4px solid var(--border); font-size:14.5px; display:flex; gap:10px; }
.review-opt.is-correct{ border-color:var(--correct); background:var(--correct-soft); }
.review-opt.is-wrong{ border-color:var(--wrong); background:var(--wrong-soft); }
.review-explain{ margin-top:10px; background:var(--paper); border-radius:10px; padding:10px 14px; font-size:14.5px; color:var(--ink-soft); }

/* ---------- leaderboard ---------- */
.lb-row{ display:flex; align-items:center; gap:14px; padding:13px 16px; border-radius:12px; background:var(--card); border:1px solid var(--border); margin-bottom:8px; }
.lb-rank{ width:30px; height:30px; border-radius:50%; background:var(--paper-deep); display:flex; align-items:center; justify-content:center; font-family:var(--font-en); font-weight:700; font-size:13px; flex:none; }
.lb-row.top1 .lb-rank{ background:#F4CB4E; color:#5A4300; }
.lb-row.top2 .lb-rank{ background:#D8DEE6; color:#3B4552; }
.lb-row.top3 .lb-rank{ background:#E8B98C; color:#5A3A1B; }
.lb-row.is-me{ border-color:var(--green-mid); background:var(--green-soft); box-shadow:0 0 0 2px var(--green-mid) inset; }
.lb-row.is-me .lb-name{ color:var(--green-deep); }
.lb-name{ flex:1; font-weight:600; }
.lb-score{ font-family:var(--font-en); font-weight:700; color:var(--green-deep); }
.lb-sub{ font-size:11.5px; color:var(--ink-soft); font-weight:400; }
.lb-exam-group{ margin-bottom:28px; }
.lb-exam-head{
  display:flex; align-items:baseline; justify-content:space-between; gap:10px;
  padding:8px 2px; margin-bottom:10px; border-bottom:2px solid var(--border);
}
.lb-exam-head h2{ font-size:16px; margin:0; }

/* ---------- course-grouped result lists ---------- */
.result-course-group{ margin-bottom:26px; }
.result-course-head{
  display:flex; align-items:center; justify-content:space-between; gap:10px;
  padding:10px 4px; margin-bottom:10px; border-bottom:2px solid var(--border);
}
.result-course-head h2{ font-size:16.5px; margin:0; }
.result-course-head .chip{ font-family:var(--font-en); }

/* ---------- courses ---------- */
.course-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
@media (max-width:900px){ .course-grid{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:620px){ .course-grid{ grid-template-columns:1fr; } }
.course-card{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius-md);
  overflow:hidden; display:flex; flex-direction:column; transition:transform .15s, box-shadow .15s;
}
.course-card:hover{ transform:translateY(-3px); box-shadow:var(--shadow-card); }
.course-banner{
  aspect-ratio:16/9; width:100%; background:var(--paper-deep) url('') center/cover no-repeat;
  position:relative; overflow:hidden;
}
.course-banner img{ width:100%; height:100%; object-fit:cover; }
.course-banner .cat-badge{
  position:absolute; top:10px; left:10px; font-family:var(--font-en); font-size:11.5px; font-weight:700;
  padding:4px 10px; border-radius:999px; background:rgba(11,79,63,.9); color:#fff; text-transform:uppercase; letter-spacing:.4px;
}
.course-banner .cat-badge.free{ background:var(--amber); color:var(--green-deep); }
.course-card-body{ padding:16px; display:flex; flex-direction:column; gap:8px; flex:1; }
.course-card-body h3{ font-size:16.5px; margin:0; }
.course-card-body p{ font-size:13.5px; margin:0; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.course-price-row{ display:flex; align-items:center; justify-content:space-between; margin-top:auto; padding-top:10px; }
.price-tag{ font-family:var(--font-en); font-weight:800; font-size:16px; color:var(--green-deep); }
.price-tag.free{ color:var(--amber); }

.course-hero-banner{ aspect-ratio:16/9; width:100%; border-radius:var(--radius-lg); overflow:hidden; background:var(--paper-deep); margin-bottom:20px; }
.course-hero-banner img{ width:100%; height:100%; object-fit:cover; }

.access-badge{ display:inline-flex; align-items:center; gap:6px; padding:6px 14px; border-radius:999px; font-size:13px; font-weight:600; }
.access-badge.approved{ background:var(--correct-soft); color:var(--correct); }
.access-badge.pending{ background:var(--amber-soft); color:#8A5D0F; }
.access-badge.declined{ background:var(--wrong-soft); color:var(--wrong); }
.access-badge.locked{ background:var(--paper-deep); color:var(--ink-soft); }

.lock-row{
  display:flex; align-items:center; justify-content:space-between; gap:14px;
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius-md);
  padding:16px 18px; margin-bottom:10px; opacity:.75;
}

.pay-box{
  background:var(--green-soft); border:1.5px dashed var(--green-mid); border-radius:14px;
  padding:16px 18px; text-align:center; margin-bottom:18px;
}
.pay-box .amt{ font-family:var(--font-en); font-weight:800; font-size:24px; color:var(--green-deep); letter-spacing:1px; }
.pay-box .lbl{ font-size:12.5px; color:var(--ink-soft); margin-bottom:4px; }
.copy-btn{
  border:none; background:var(--green-mid); color:#fff; border-radius:999px; padding:5px 12px;
  font-size:12px; cursor:pointer; margin-left:8px; font-family:var(--font-en);
}

.method-row{ display:flex; gap:10px; margin-bottom:16px; }
.method-pill{ flex:1; border:1.5px solid var(--border); border-radius:12px; padding:12px 8px; text-align:center; cursor:pointer; font-size:13.5px; font-weight:600; }
.method-pill input{ display:none; }
.method-pill.checked{ border-color:var(--green-mid); background:var(--green-soft); color:var(--green-deep); }

/* ---------- tables (admin) ---------- */
.table-wrap{ overflow:auto; border:1px solid var(--border); border-radius:14px; background:#fff; }
table{ width:100%; border-collapse:collapse; font-size:14px; }
th, td{ text-align:left; padding:12px 14px; border-bottom:1px solid var(--border); white-space:nowrap; }
td.wrap{ white-space:normal; min-width:200px; }
th{ background:var(--paper); font-family:var(--font-en); font-size:12.5px; text-transform:uppercase; letter-spacing:.5px; color:var(--ink-soft); }
tr:last-child td{ border-bottom:none; }

.tabs{ display:flex; gap:6px; margin-bottom:20px; flex-wrap:wrap; }
.tab-btn{ padding:9px 16px; border-radius:999px; border:1.5px solid var(--border); background:#fff; cursor:pointer; font-size:14px; }
.tab-btn.active{ background:var(--green-mid); border-color:var(--green-mid); color:#fff; font-weight:600; }
.tab-panel{ display:none; }
.tab-panel.active{ display:block; }

/* ---------- footer ---------- */
.site-footer{ border-top:1px solid var(--border); padding:26px 0 30px; margin-top:50px; text-align:center; }
.site-footer p{ margin:0; font-size:13.5px; color:var(--ink-soft); }
.footer-links{ display:flex; justify-content:center; gap:8px 20px; flex-wrap:wrap; margin-bottom:12px; }
.footer-links a{ font-size:13px; color:var(--ink-soft); }
.footer-links a:hover{ color:var(--green-mid); }

/* ---------- misc ---------- */
.empty-state{ text-align:center; padding:50px 20px; color:var(--ink-soft); }
.empty-state .ico{ font-size:34px; margin-bottom:10px; }
.loader{ display:flex; align-items:center; gap:10px; color:var(--ink-soft); padding:30px 0; justify-content:center; }
.spinner{ width:18px; height:18px; border:2.5px solid var(--border); border-top-color:var(--green-mid); border-radius:50%; animation:spin .7s linear infinite; }
@keyframes spin{ to{ transform:rotate(360deg); } }
.banner{ padding:12px 16px; border-radius:10px; font-size:14px; margin-bottom:16px; }
.banner.error{ background:var(--wrong-soft); color:var(--wrong); }
.banner.ok{ background:var(--correct-soft); color:var(--correct); }
.banner.info{ background:var(--green-soft); color:var(--green-deep); }
.page-head{ padding:34px 0 10px; }
.page-head h1{ font-size:26px; }
.small-note{ font-size:12.5px; color:var(--ink-soft); }
.right{ text-align:right; }
.flex-between{ display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap; }
.mt-0{ margin-top:0; }
.center{ text-align:center; }

/* ============================================================
   Solve sheet (print / A4). This page is always rendered in a
   fixed light palette — it should look the same on paper no
   matter what theme the site is in, so colors below are hard
   coded rather than pulled from the (possibly dark) --tokens.
   ============================================================ */
.print-toolbar{
  position:sticky; top:0; z-index:40; background:var(--green-deep); color:#fff;
  padding:12px 20px; display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap;
}
.print-toolbar .ptb-title{ font-size:14.5px; font-weight:600; }
.print-toolbar .ptb-actions{ display:flex; gap:10px; flex-wrap:wrap; }

.print-wrap{ background:#DDD9CB; padding:30px clamp(10px, 3vw, 40px) 70px; min-height:100vh; }
[data-theme="dark"] .print-wrap{ background:#0A100D; }

/* On screen this is a comfortable, spacious, full-width reading view —
   single column, generous type. The tight, precise two-column A4 layout
   only kicks in under @media print below, where it actually needs to fit
   real paper. */
.print-page{
  width:100%; max-width:1100px; margin:0 auto; background:#fff; color:#161616;
  padding:clamp(24px, 5vw, 56px); box-sizing:border-box; position:relative; overflow:hidden;
  border-radius:14px; box-shadow:0 10px 32px rgba(0,0,0,.28); font-family:var(--font-bn);
}

.watermark-layer{
  position:absolute; inset:0; z-index:0; pointer-events:none; overflow:hidden;
  display:flex; flex-wrap:wrap; align-content:flex-start; justify-content:center;
  opacity:.13; transform:rotate(-28deg) scale(1.3); transform-origin:center;
}
.watermark-layer span{ font-size:24px; font-weight:800; color:#0B4F3F; white-space:nowrap; margin:22px 28px; font-family:var(--font-en); }

.print-content{ position:relative; z-index:1; }

.print-header{ text-align:center; border-bottom:2.5px solid #0B4F3F; padding-bottom:16px; margin-bottom:26px; }
.print-header .pbrand{ font-family:var(--font-en); font-weight:800; font-size:14px; letter-spacing:1.5px; color:#0B4F3F; text-transform:uppercase; }
.print-header .pcourse{ font-size:14px; color:#555; margin-top:4px; }
.print-header h1{ font-size:23px; margin:10px 0 4px; color:#161616; }
.print-header .pmeta{ font-size:12.5px; color:#777; margin-top:6px; font-family:var(--font-en); }

.print-columns{ column-count:1; }
@media (min-width:760px){
  .print-columns{ column-count:2; column-gap:40px; }
  .print-q{ break-inside:avoid; -webkit-column-break-inside:avoid; }
}
.print-q{ margin-bottom:22px; font-size:14.5px; line-height:1.75; color:#1b1b1b; }
.print-q .pqn{ font-weight:700; color:#0B4F3F; font-family:var(--font-en); font-size:13px; }
.print-q .pqtext{ margin:5px 0 9px; }
.print-q .puddipok{ font-size:13.5px; color:#444; background:#F1EEE2; border-left:3px solid #D99A2B; padding:8px 12px; margin-bottom:9px; border-radius:5px; }
.print-q .popts{ margin:0 0 9px; padding:0; list-style:none; }
.print-q .popts li{ margin-bottom:5px; }
.print-q .popts li.pcorrect{ font-weight:700; color:#0B4F3F; }
.print-q .popts li.pcorrect::before{ content:"\2713  "; }
.print-q .pexplain{ font-size:13px; color:#3a3a3a; background:#F1EEE2; padding:8px 11px; border-radius:6px; margin-top:6px; }
.print-q .pexplain b{ color:#0B4F3F; }

.print-footer-note{ text-align:center; font-size:11px; color:#999; margin-top:26px; font-family:var(--font-en); }

@page{ size:A4; margin:12mm; }
@media print{
  body{ background:#fff !important; }
  .topnav, .site-footer, .print-toolbar, .no-print{ display:none !important; }
  .print-wrap{ background:#fff !important; padding:0; min-height:0; }
  .print-page{
    box-shadow:none; margin:0; border-radius:0; max-width:none; min-height:0; padding:0;
  }
  .watermark-layer{ position:fixed; inset:-20%; opacity:.07; }
  .print-header{ padding-bottom:12px; margin-bottom:18px; }
  .print-header h1{ font-size:19px; }
  .print-columns{ column-count:2; column-gap:24px; }
  .print-q{
    break-inside:avoid; -webkit-column-break-inside:avoid; margin-bottom:13px;
    font-size:12px; line-height:1.5;
  }
  .print-q .pqtext{ margin:3px 0 5px; }
  .print-q .puddipok{ font-size:11px; padding:5px 8px; margin-bottom:5px; }
  .print-q .popts li{ margin-bottom:2px; }
  .print-q .pexplain{ font-size:10.8px; padding:5px 7px; margin-top:3px; }
  a{ color:inherit; text-decoration:none; }
}