:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #1d4ed8;
  --primary-hover: #1e40af;
  --primary-soft: #eff4ff;
  --success: #15803d;
  --success-soft: #ecfdf3;
  --warn: #b45309;
  --warn-soft: #fffbeb;
  --danger: #b91c1c;
  --danger-soft: #fef2f2;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 4px 16px rgba(16, 24, 40, 0.06);
  font-family: 'Poppins', 'Anek Bangla', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
}

/* Bangla screens: Anek Bangla for everything, including the English words inside Bangla sentences */
html[lang="bn"] { font-family: 'Anek Bangla', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif; }

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); font-size: 15px; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 12px; }
h1 { font-size: 26px; }
h2 { font-size: 20px; }
h3 { font-size: 16px; }
p { margin: 0 0 12px; }
a { color: var(--primary); }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.center { text-align: center; }
.hidden { display: none !important; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
.stack > * + * { margin-top: 12px; }

/* ---------- layout ---------- */
.page { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; margin-bottom: 24px; color: var(--text); }
.topbar { display: flex; align-items: center; gap: 10px; margin-bottom: 22px; flex-wrap: wrap; }
.topbar .brand { margin: 0; }
.lang-switch { display: inline-flex; border: 1px solid #d0d5dd; border-radius: 8px; overflow: hidden; background: #fff; }
.lang-switch button { border: 0; background: transparent; font: inherit; font-size: 13px; font-weight: 600; padding: 6px 12px; cursor: pointer; color: var(--muted); }
.lang-switch button.on { background: var(--primary); color: #fff; }
.attention { animation: attention 1.6s ease-in-out infinite; }
@keyframes attention { 0%, 100% { box-shadow: 0 0 0 0 rgba(29, 78, 216, 0.5); } 50% { box-shadow: 0 0 0 8px rgba(29, 78, 216, 0); } }
.brand-logo { height: 34px; width: auto; display: block; }
.brand-sep { width: 1px; height: 24px; background: #d0d5dd; margin: 0 4px; }
.admin-nav .brand { background: #fff; border-radius: 10px; padding: 10px 12px; margin: 0 4px 8px; }
.admin-nav .brand-logo { height: 30px; }
.nav-title { font-size: 12px; text-transform: uppercase; letter-spacing: 0.6px; color: #9ca3af; padding: 8px 12px 10px; }
.brand-mark { width: 30px; height: 30px; border-radius: 8px; background: var(--primary); color: #fff; display: grid; place-items: center; font-size: 14px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px; }
.card + .card { margin-top: 16px; }
.steps { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.steps span { font-size: 12px; padding: 4px 10px; border-radius: 999px; background: #eef0f3; color: var(--muted); }
.steps span.on { background: var(--primary); color: #fff; }
.steps span.done { background: var(--success-soft); color: var(--success); }

/* ---------- forms ---------- */
label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
input:not([type]), input[type=text], input[type=email], input[type=number], input[type=datetime-local], textarea, select {
  width: 100%; padding: 10px 12px; border: 1px solid #d0d5dd; border-radius: 8px; font: inherit; background: #fff; color: var(--text);
}
textarea { resize: vertical; min-height: 90px; }
input:focus, textarea:focus, select:focus { outline: 2px solid var(--primary-soft); border-color: var(--primary); }
.field { margin-bottom: 16px; }
.field .hint { font-size: 13px; color: var(--muted); margin-top: 4px; }
.otp-input { font-size: 28px !important; letter-spacing: 10px; text-align: center; font-weight: 700; }
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; margin-bottom: 10px; cursor: pointer; }
.check input { margin-top: 4px; width: 18px; height: 18px; flex-shrink: 0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 18px; border-radius: 8px;
  border: 1px solid transparent; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; white-space: nowrap;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-secondary { background: #fff; color: var(--primary); border-color: #b9c8ee; box-shadow: 0 1px 1px rgba(16, 24, 40, 0.04); }
.btn-secondary:hover:not(:disabled) { background: var(--primary-soft); border-color: var(--primary); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-ghost { background: transparent; color: var(--primary); padding: 6px 10px; }
.btn-lg { padding: 14px 26px; font-size: 16px; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-block { width: 100%; }

/* ---------- notices ---------- */
.notice { padding: 12px 14px; border-radius: 8px; font-size: 14px; margin-bottom: 16px; border: 1px solid; }
.notice-info { background: var(--primary-soft); border-color: #c7d7fe; color: #1e3a8a; }
.notice-warn { background: var(--warn-soft); border-color: #fde68a; color: #78350f; }
.notice-danger { background: var(--danger-soft); border-color: #fecaca; color: #7f1d1d; }
.notice-success { background: var(--success-soft); border-color: #bbf7d0; color: #14532d; }
.badge { display: inline-block; font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 999px; background: #eef0f3; color: #374151; }
.badge-green { background: var(--success-soft); color: var(--success); }
.badge-amber { background: var(--warn-soft); color: var(--warn); }
.badge-red { background: var(--danger-soft); color: var(--danger); }
.badge-blue { background: var(--primary-soft); color: var(--primary); }

.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 16px 0 20px; }
.fact { background: #f9fafb; border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }
.fact b { display: block; font-size: 20px; }
.fact span { font-size: 13px; color: var(--muted); }
ul.clean { padding-left: 20px; margin: 0 0 12px; }
ul.clean li { margin-bottom: 6px; }

/* ---------- system check ---------- */
.checks { list-style: none; padding: 0; margin: 0 0 20px; }
.checks li { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--border); align-items: flex-start; }
.checks li:last-child { border-bottom: 0; }
.checks .ico { width: 22px; height: 22px; border-radius: 50%; flex-shrink: 0; display: grid; place-items: center; font-size: 12px; font-weight: 700; background: #eef0f3; color: var(--muted); margin-top: 1px; }
.checks .ok .ico { background: var(--success-soft); color: var(--success); }
.checks .fail .ico { background: var(--danger-soft); color: var(--danger); }
.checks .warn .ico { background: var(--warn-soft); color: var(--warn); }
.checks .detail { font-size: 13px; color: var(--muted); }
.preview-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
@media (max-width: 640px) { .preview-wrap { grid-template-columns: 1fr; } }
.preview { width: 100%; aspect-ratio: 4 / 3; background: #111; border-radius: 10px; object-fit: cover; }
video.mirror { transform: scaleX(-1); }
.meter { height: 8px; background: #eef0f3; border-radius: 99px; overflow: hidden; }
.meter > div { height: 100%; width: 0; background: var(--success); transition: width 0.08s linear; }

/* ---------- live assessment ---------- */
body.live { background: #f3f4f6; overflow: hidden; }
.live-shell { position: fixed; inset: 0; display: grid; grid-template-rows: auto 1fr auto; background: #f3f4f6; }
.live-top { display: flex; align-items: center; gap: 16px; padding: 12px 24px; background: #fff; border-bottom: 1px solid var(--border); }
.rec { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; color: var(--danger); font-size: 13px; letter-spacing: 0.5px; }
.rec::before { content: ''; width: 10px; height: 10px; border-radius: 50%; background: var(--danger); animation: pulse 1.4s infinite; }
.rec.off { color: var(--muted); }
.rec.off::before { background: var(--muted); animation: none; }
@keyframes pulse { 50% { opacity: 0.3; } }
.timer { font-variant-numeric: tabular-nums; font-size: 26px; font-weight: 700; padding: 4px 14px; border-radius: 10px; background: #f3f4f6; }
.timer.t-warn { background: var(--warn-soft); color: var(--warn); }
.timer.t-danger { background: var(--danger-soft); color: var(--danger); }
.live-main { display: grid; grid-template-columns: 1fr 280px; gap: 20px; padding: 20px 24px; overflow: hidden; min-height: 0; }
.case-box { position: relative; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 32px; overflow-y: auto;
  user-select: none; -webkit-user-select: none; transition: filter 0.2s; }
.case-box h2 { font-size: 22px; }
.case-box .case-text { font-size: 17px; line-height: 1.7; max-width: 70ch; }
.case-box.blurred { filter: blur(14px); pointer-events: none; }
.watermark { position: absolute; inset: 0; pointer-events: none; background-repeat: repeat; opacity: 1; }
.side { display: flex; flex-direction: column; gap: 12px; min-height: 0; }
.selfview { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 10px; background: #111; transform: scaleX(-1); }
.side .panel { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 12px; font-size: 13px; }
.live-bottom { display: flex; align-items: center; gap: 12px; padding: 14px 24px; background: #fff; border-top: 1px solid var(--border); }
.side .guide ul { padding-left: 18px; }
.side .guide li { margin-bottom: 5px; }
@media (max-width: 900px) and (min-width: 701px) {
  .live-main { grid-template-columns: 1fr; overflow-y: auto; }
  .side { flex-direction: row; flex-wrap: wrap; align-items: flex-start; }
  .selfview { width: 180px; }
  .side .panel { flex: 1; min-width: 200px; }
}
/* phones */
@media (max-width: 700px) {
  .page { padding: 18px 14px 48px; }
  .card { padding: 20px 16px; }
  h1 { font-size: 22px; }
  .live-top { padding: 10px 12px; gap: 8px; }
  .timer { font-size: 20px; padding: 2px 10px; }
  .live-main { grid-template-columns: 1fr; padding: 10px; gap: 10px; overflow-y: auto; }
  .case-box { padding: 16px 14px; overflow: visible; }
  .case-box h2 { font-size: 19px; padding-right: 96px; }
  .case-box .case-text { font-size: 16px; }
  .selfview { position: fixed; top: 56px; right: 10px; width: 92px; z-index: 30; border: 2px solid #fff; box-shadow: var(--shadow); }
  .side { flex-direction: column; }
  .live-bottom { padding: 10px 12px; gap: 8px; }
  .live-bottom .hint { display: none; }
  .live-bottom .btn-lg { padding: 12px 18px; font-size: 15px; }
  .banner { top: 56px; left: 10px; right: 10px; transform: none; text-align: center; }
  .facts { grid-template-columns: 1fr 1fr; }
}
.overlay { position: fixed; inset: 0; background: rgba(17, 24, 39, 0.55); display: grid; place-items: center; z-index: 50; padding: 16px; }
.overlay .card { max-width: 480px; text-align: center; }
.banner { position: fixed; top: 64px; left: 50%; transform: translateX(-50%); z-index: 40; padding: 10px 16px; border-radius: 8px; font-weight: 600; font-size: 14px; box-shadow: var(--shadow); }
.banner-warn { background: var(--warn-soft); color: var(--warn); border: 1px solid #fde68a; }

/* ---------- modal & toast ---------- */
.modal-backdrop { position: fixed; inset: 0; background: rgba(17, 24, 39, 0.5); display: grid; place-items: center; z-index: 100; padding: 16px; }
.modal { background: #fff; border-radius: var(--radius); padding: 24px; max-width: 480px; width: 100%; box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2); }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; flex-wrap: wrap; }
#toasts { position: fixed; bottom: 20px; right: 20px; display: flex; flex-direction: column; gap: 8px; z-index: 200; }
.toast { padding: 10px 16px; border-radius: 8px; background: #111827; color: #fff; font-size: 14px; box-shadow: var(--shadow); max-width: 360px; }
.toast-error { background: var(--danger); }
.toast-success { background: var(--success); }

.spinner { width: 36px; height: 36px; border: 3px solid #e5e7eb; border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; margin: 0 auto 16px; }
@keyframes spin { to { transform: rotate(360deg); } }
.progress { height: 8px; background: #eef0f3; border-radius: 99px; overflow: hidden; margin: 12px 0; }
.progress > div { height: 100%; background: var(--primary); transition: width 0.3s; }

/* ---------- admin ---------- */
.admin-shell { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.admin-nav { background: #111827; color: #d1d5db; padding: 20px 12px; }
.admin-nav .brand { color: #fff; padding: 0 8px; }
.admin-nav a { display: block; padding: 9px 12px; border-radius: 8px; color: #d1d5db; text-decoration: none; font-weight: 500; margin-bottom: 2px; }
.admin-nav a.on, .admin-nav a:hover { background: #1f2937; color: #fff; }
.admin-nav .who { font-size: 12px; color: #9ca3af; padding: 16px 12px 0; border-top: 1px solid #1f2937; margin-top: 16px; word-break: break-all; }
.admin-main { padding: 28px 32px; min-width: 0; }
@media (max-width: 800px) { .admin-shell { grid-template-columns: 1fr; } .admin-main { padding: 20px 16px; } }
.page-head { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.page-head h1 { margin: 0; font-size: 22px; }
.crumbs { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.crumbs a { color: var(--muted); }
.table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.4px; color: var(--muted); background: #f9fafb; font-weight: 600; }
tr:last-child td { border-bottom: 0; }
tr.click { cursor: pointer; }
tr.click:hover td { background: #f9fafb; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tabs a { padding: 10px 14px; text-decoration: none; color: var(--muted); font-weight: 600; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs a.on { color: var(--primary); border-bottom-color: var(--primary); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 800px) { .grid2 { grid-template-columns: 1fr; } }
.review-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 1100px) { .review-grid { grid-template-columns: 1fr; } }
.player { width: 100%; background: #000; border-radius: 10px; aspect-ratio: 4 / 3; }
.seg-list { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0; }
.timeline { list-style: none; padding: 0; margin: 0; font-size: 13px; max-height: 480px; overflow-y: auto; }
.timeline li { display: grid; grid-template-columns: 70px 1fr; gap: 10px; padding: 7px 0; border-bottom: 1px dashed var(--border); }
.timeline .t { color: var(--muted); font-variant-numeric: tabular-nums; }
.timeline .sev-review { color: var(--danger); font-weight: 600; }
.timeline .sev-note { color: var(--warn); font-weight: 600; }
.timeline li.jump { cursor: pointer; }
.timeline li.jump:hover { background: #f9fafb; }
.scores { display: flex; gap: 6px; }
.scores button { width: 40px; height: 40px; border-radius: 8px; border: 1px solid #d0d5dd; background: #fff; font-weight: 700; cursor: pointer; font: inherit; }
.scores button.on { background: var(--primary); border-color: var(--primary); color: #fff; }
.case-preview { background: #f9fafb; border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; font-size: 14px; max-height: 260px; overflow-y: auto; }
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 20px; }

/* countdown before a case starts */
.countdown-overlay { background: rgba(17, 24, 39, 0.6); z-index: 60; }
.countdown { font-size: 140px; font-weight: 800; color: #fff; line-height: 1; text-shadow: 0 10px 40px rgba(0, 0, 0, 0.35); }
.countdown.pop { animation: cd-pop 0.5s ease-out; }
.countdown.go { font-size: 88px; color: #86efac; }
@keyframes cd-pop { from { transform: scale(1.7); opacity: 0.15; } to { transform: scale(1); opacity: 1; } }
.skeleton { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; }
.skeleton-line { height: 15px; border-radius: 6px; background: #e5e7eb; display: block; }

/* system check: make it obvious when the test recording is running */
.preview-holder { position: relative; }
.rec-badge {
  position: absolute; top: 10px; left: 10px; display: flex; align-items: center; gap: 7px;
  background: rgba(185, 28, 28, 0.95); color: #fff; font-size: 12px; font-weight: 700;
  letter-spacing: 0.6px; padding: 5px 11px; border-radius: 999px; font-style: normal;
}
.rec-badge i { font-style: normal; }
.rec-badge span { width: 9px; height: 9px; border-radius: 50%; background: #fff; animation: pulse 1.2s infinite; }
.preview.recording { outline: 3px solid var(--danger); outline-offset: 2px; }

.pre-count {
  position: absolute; inset: 0; display: grid; place-items: center; border-radius: 10px;
  background: rgba(17, 24, 39, 0.55); color: #fff; font-size: 76px; font-weight: 800;
}

/* ---------- admin panel refresh ---------- */
.admin-shell { grid-template-columns: 248px 1fr; }
.admin-nav {
  background: #0b1220; padding: 22px 14px; display: flex; flex-direction: column; gap: 2px;
  position: sticky; top: 0; height: 100vh;
}
.admin-nav .brand { background: none; border-radius: 0; padding: 0 8px; margin: 0 0 20px; }
.admin-nav .brand-logo { height: 26px; }
.admin-nav .nav-title {
  font-size: 11px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase;
  color: #64748b; padding: 0 10px 10px;
}
.admin-nav a {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 10px 12px; border-radius: 10px; font-size: 14px; font-weight: 500; color: #cbd5e1; margin: 0;
}
.admin-nav a:hover { background: #16213a; color: #fff; }
.admin-nav a.on { background: var(--primary); color: #fff; font-weight: 600; box-shadow: 0 6px 18px rgba(29, 78, 216, 0.35); }
.admin-nav .pill { background: var(--danger); color: #fff; border-radius: 999px; font-size: 11px; font-weight: 700; padding: 1px 8px; }
.admin-nav a.on .pill { background: rgba(255, 255, 255, 0.25); }
.nav-foot { margin-top: auto; border-top: 1px solid #1e293b; padding-top: 14px; }
.nav-user { display: flex; align-items: center; gap: 10px; padding: 4px 8px 10px; min-width: 0; }
.avatar { width: 32px; height: 32px; border-radius: 50%; background: #1e293b; color: #e2e8f0; display: grid; place-items: center; font-size: 12px; font-weight: 700; flex: 0 0 auto; }
.who2 { min-width: 0; font-size: 11px; color: #64748b; }
.who2 b { display: block; font-size: 12px; font-weight: 600; color: #e2e8f0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-foot a { display: inline-block; color: #94a3b8; font-size: 13px; padding: 6px 8px; }
.nav-foot a:hover { color: #fff; background: transparent; }

.admin-main { padding: 28px 32px 64px; max-width: 1280px; }
.page-head h1 { font-size: 24px; letter-spacing: -0.2px; }
.page-sub { color: var(--muted); font-size: 14px; margin: -10px 0 20px; max-width: 70ch; }
.dev-strip {
  background: var(--warn-soft); border: 1px solid #fde68a; color: #78350f;
  font-size: 13px; line-height: 1.5; padding: 9px 13px; border-radius: 8px; margin-bottom: 20px;
}
.dev-strip b { font-weight: 700; margin-right: 4px; }
.dev-strip b::after { content: ':'; }
.table-wrap { border-radius: 14px; box-shadow: var(--shadow); }
th, td { padding: 13px 16px; }
th { background: #f8fafc; font-size: 11px; }
tr.click:hover td { background: #f5f8ff; }
.tabs { gap: 20px; }
.tabs a { padding: 10px 2px; }
.card { border-radius: 14px; }

/* admin login */
.login-page { padding-top: 56px; }
.login-brand { background: #0b1220; border-radius: 14px; padding: 18px 20px; margin-bottom: 18px; display: flex; align-items: center; gap: 14px; }
.login-brand img { height: 26px; }
.login-brand div { color: #cbd5e1; font-size: 13px; font-weight: 600; letter-spacing: 0.4px; border-left: 1px solid #334155; padding-left: 14px; }

@media (max-width: 800px) {
  .admin-shell { grid-template-columns: 1fr; }
  .admin-nav { position: static; height: auto; flex-direction: row; flex-wrap: wrap; align-items: center; padding: 12px; gap: 6px; }
  .admin-nav .brand { margin: 0 10px 0 0; }
  .admin-nav .nav-title { display: none; }
  .nav-foot { margin: 0 0 0 auto; border: 0; padding: 0; display: flex; align-items: center; }
  .nav-user { padding: 0 8px; }
  .who2 { display: none; }
  .admin-main { padding: 18px 16px 48px; }
}

/* instructions: how the recording is used */
.privacy-box { background: var(--success-soft); border: 1px solid #bbf7d0; border-radius: 10px; padding: 14px 16px; margin: 18px 0 4px; }
.privacy-box h3 { margin: 0 0 6px; color: #14532d; }
.privacy-box p { margin: 0; color: #14532d; }