:root { 
  --brand: #7a1f2b;
  --brand-dark: #5a1520;
  --on-brand: #ffffff;
  --accent: #7a1f2b;
  --gold: #e0b44c;
  --gold-hover: #ecc565;
  --gold-ink: #5a1520;
  --ink: #1d1d1f;
  --muted: #6b6b70;
  --line: #e2e0dc;
  --field-line: #cfccc6;
  --bg: #f6f4f1;
  --card: #ffffff;
  --field-bg: #ffffff;
  --hover: #fbf5f5;
  --neutral-bg: #eeeeee;
  --ok-bg: #e3f2e8; --ok-ink: #2f7d4f;
  --warn-bg: #fbeadf; --warn-ink: #a34a17;
  --info-bg: #e4ecf7; --info-ink: #2d5a8f;
  --gold-bg: #faf0d4; --gold-text: #7a5a10;
  --flash-bg: #e3f2e8; --flash-ink: #1e5434; --flash-line: #bcdcc7;
  --error-bg: #fdecec; --error-ink: #8a1c1c; --error-line: #f0c0c0;
  --danger-ink: #a02020; --danger-line: #d9a3a3; --danger-hover: #fdf0f0;
  --band-bg: #1d1d1f; --band-ink: #c9c9cc;
  color-scheme: light;
 --radius: 10px; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { 
  --brand: #8f2a38;
  --brand-dark: #4a111b;
  --on-brand: #ffffff;
  --accent: #f08b99;
  --gold: #e0b44c;
  --gold-hover: #ecc565;
  --gold-ink: #3d0d15;
  --ink: #ececef;
  --muted: #a3a3ab;
  --line: #303036;
  --field-line: #45454d;
  --bg: #121214;
  --card: #1c1c20;
  --field-bg: #141417;
  --hover: #2a1c20;
  --neutral-bg: #2c2c32;
  --ok-bg: #173323; --ok-ink: #7fd1a0;
  --warn-bg: #3a2414; --warn-ink: #f2a874;
  --info-bg: #172840; --info-ink: #8fbcf0;
  --gold-bg: #362b12; --gold-text: #f0cf7a;
  --flash-bg: #173323; --flash-ink: #a8e3bf; --flash-line: #24543a;
  --error-bg: #3b1717; --error-ink: #f5b0b0; --error-line: #6b2626;
  --danger-ink: #f28b8b; --danger-line: #6b2b2b; --danger-hover: #2e1616;
  --band-bg: #0b0b0d; --band-ink: #a3a3ab;
  color-scheme: dark;
 } }
:root[data-theme="dark"] { 
  --brand: #8f2a38;
  --brand-dark: #4a111b;
  --on-brand: #ffffff;
  --accent: #f08b99;
  --gold: #e0b44c;
  --gold-hover: #ecc565;
  --gold-ink: #3d0d15;
  --ink: #ececef;
  --muted: #a3a3ab;
  --line: #303036;
  --field-line: #45454d;
  --bg: #121214;
  --card: #1c1c20;
  --field-bg: #141417;
  --hover: #2a1c20;
  --neutral-bg: #2c2c32;
  --ok-bg: #173323; --ok-ink: #7fd1a0;
  --warn-bg: #3a2414; --warn-ink: #f2a874;
  --info-bg: #172840; --info-ink: #8fbcf0;
  --gold-bg: #362b12; --gold-text: #f0cf7a;
  --flash-bg: #173323; --flash-ink: #a8e3bf; --flash-line: #24543a;
  --error-bg: #3b1717; --error-ink: #f5b0b0; --error-line: #6b2626;
  --danger-ink: #f28b8b; --danger-line: #6b2b2b; --danger-hover: #2e1616;
  --band-bg: #0b0b0d; --band-ink: #a3a3ab;
  color-scheme: dark;
 }

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink); background: var(--bg); line-height: 1.5; font-size: 16px;
}
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: 1.75rem; } h2 { font-size: 1.3rem; } h3 { font-size: 1.05rem; }
p { margin: 0 0 1em; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.pre { white-space: pre-wrap; overflow-wrap: anywhere; }
.center { text-align: center; }
.mt { margin-top: 16px; }
.mb { margin-bottom: 10px; }
.narrow { max-width: 520px; }
.narrow-wide { max-width: 760px; }
.row.between { justify-content: space-between; align-items: baseline; }
.hidden, [hidden] { display: none !important; }

/* ---------- Dih2l portal ---------- */
.topbar { background: var(--brand); color: var(--on-brand); }
.topbar .inner { max-width: 1100px; margin: 0 auto; padding: 0 16px; height: 56px; display: flex; align-items: center; gap: 16px; }
.brand { color: var(--on-brand); text-decoration: none; font-weight: 700; font-size: 1.15rem; letter-spacing: .01em; display: flex; align-items: center; gap: 8px; }
.brand .mark { background: var(--gold); color: var(--gold-ink); border-radius: 6px; padding: 2px 7px; font-size: .95rem; }
.topbar .spacer { flex: 1; }
.topbar .who { font-size: .9rem; opacity: .9; }
.topbar a.link, .topbar button.link { color: var(--on-brand); font: inherit; font-size: .9rem; background: none; border: 0; cursor: pointer; padding: 0; text-decoration: underline; }
.topbar form { margin: 0; }
@media (max-width: 640px) { .topbar .who { display: none; } .topbar .inner { gap: 12px; } }
main.wrap { max-width: 1100px; margin: 0 auto; padding: 24px 16px 64px; }

.course-head { margin-bottom: 8px; }
.course-head .code { color: var(--muted); font-weight: 600; font-size: .9rem; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: 12px 0 24px; overflow-x: auto; }
.tabs a { padding: 10px 14px; text-decoration: none; color: var(--muted); border-bottom: 3px solid transparent; white-space: nowrap; }
.tabs a.on { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.course-tile { display: block; text-decoration: none; color: inherit; border-top: 6px solid var(--brand); }
.course-tile:hover { border-color: var(--accent); }
.course-tile .code { color: var(--accent); font-weight: 700; font-size: .85rem; }
.cols { display: grid; grid-template-columns: 2fr 1fr; gap: 24px; align-items: start; }
@media (max-width: 800px) { .cols { grid-template-columns: 1fr; } }
.actions { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }

.list { list-style: none; margin: 0; padding: 0; }
.list > li { padding: 12px 0; border-top: 1px solid var(--line); display: flex; gap: 12px; align-items: flex-start; justify-content: space-between; flex-wrap: wrap; }
.list > li:first-child { border-top: 0; padding-top: 0; }
.list .grow { flex: 1; min-width: 180px; }

table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; }
th .cat-label { text-transform: none; letter-spacing: 0; font-weight: 500; color: var(--accent); }
.table-scroll { overflow-x: auto; }

label { display: block; font-weight: 600; font-size: .9rem; margin: 0 0 4px; }
.field { margin-bottom: 14px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=datetime-local], textarea, select {
  width: 100%; font: inherit; padding: 9px 11px; border: 1px solid var(--field-line); border-radius: 8px; background: var(--field-bg); color: var(--ink);
}
textarea { min-height: 110px; resize: vertical; }
input:focus, textarea:focus, select:focus { outline: 2px solid var(--gold); outline-offset: 1px; border-color: var(--accent); }
input[type=file] { font: inherit; font-size: .9rem; color: var(--ink); }
select.small-select { width: auto; padding: 4px 8px; font-size: .85rem; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > .field { flex: 1; min-width: 160px; }
.inline-form { display: inline; margin: 0; }

.btn { display: inline-block; font: inherit; font-weight: 600; font-size: .95rem; padding: 9px 16px; border-radius: 8px; border: 1px solid var(--brand); background: var(--brand); color: var(--on-brand); cursor: pointer; text-decoration: none; }
.btn:hover { background: var(--brand-dark); }
.btn.secondary { background: var(--card); color: var(--accent); border-color: var(--accent); }
.btn.secondary:hover { background: var(--hover); }
.btn.danger { background: var(--card); color: var(--danger-ink); border-color: var(--danger-line); font-size: .85rem; padding: 5px 10px; }
.btn.danger:hover { background: var(--danger-hover); }
.btn.small { font-size: .85rem; padding: 5px 10px; }

.badge { display: inline-block; font-size: .75rem; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: var(--neutral-bg); color: var(--muted); vertical-align: middle; }
.badge.ok { background: var(--ok-bg); color: var(--ok-ink); }
.badge.warn { background: var(--warn-bg); color: var(--warn-ink); }
.badge.info { background: var(--info-bg); color: var(--info-ink); }
.badge.gold { background: var(--gold-bg); color: var(--gold-text); }

.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; background: var(--flash-bg); color: var(--flash-ink); border: 1px solid var(--flash-line); }
.flash.error { background: var(--error-bg); color: var(--error-ink); border-color: var(--error-line); }
.flash.warn-note { background: var(--warn-bg); color: var(--warn-ink); border-color: transparent; display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.empty { color: var(--muted); padding: 8px 0; }
.score { font-weight: 700; font-size: 1.1rem; }
.joincode { font-family: ui-monospace, Consolas, monospace; font-size: 1.4rem; letter-spacing: .15em; background: var(--gold-bg); color: var(--gold-text); padding: 4px 12px; border-radius: 8px; }
.grade-input { width: 90px !important; }

/* quizzes */
.questions { margin: 0; padding-left: 1.4em; }
.question { padding: 14px 0; border-top: 1px solid var(--line); }
.question:first-child { border-top: 0; padding-top: 4px; }
.q-prompt { font-weight: 600; margin-bottom: 4px; }
.choice { font-weight: 400; display: flex; gap: 10px; align-items: center; padding: 6px 0; cursor: pointer; }
.choice input { margin: 0; }
.choices { margin: 6px 0 0; padding-left: 1.2em; font-size: .9rem; }
.choices li.correct { color: var(--ok-ink); font-weight: 600; }
.timer { position: sticky; top: 0; z-index: 5; background: var(--info-bg); color: var(--info-ink); padding: 10px 14px; border-radius: 8px; margin-bottom: 12px; font-variant-numeric: tabular-nums; }
.timer.low { background: var(--warn-bg); color: var(--warn-ink); }

/* modules */
.module h2 { color: var(--accent); }
details summary { cursor: pointer; color: var(--muted); }

.auth-box { max-width: 420px; margin: 40px auto; padding: 0 16px; }
.auth-box .card { padding: 28px; }
.auth-logo { text-align: center; margin-bottom: 20px; }
.auth-logo .brand { color: var(--accent); justify-content: center; font-size: 1.6rem; }
.auth-logo .brand .mark { font-size: 1.3rem; }
.role-pick { display: flex; gap: 8px; margin-bottom: 14px; }
.role-pick label { flex: 1; border: 1px solid var(--field-line); border-radius: 8px; padding: 10px; font-weight: 500; cursor: pointer; display: flex; gap: 8px; align-items: center; margin: 0; }
.role-pick input { margin: 0; }
.theme-toggle { font: inherit; font-size: .85rem; background: none; border: 0; color: inherit; cursor: pointer; text-decoration: underline; padding: 0; }
.auth-foot { text-align: center; margin-top: 8px; color: var(--muted); }

/* ---------- Landing page ---------- */
.site-nav { position: absolute; top: 0; left: 0; right: 0; z-index: 2; }
.site-nav .inner { max-width: 1100px; margin: 0 auto; padding: 20px 16px; display: flex; align-items: center; gap: 24px; }
.site-nav .brand { font-size: 1.2rem; }
.site-nav nav { display: flex; gap: 20px; flex: 1; justify-content: flex-end; align-items: center; flex-wrap: wrap; }
.site-nav nav a { color: #fff; text-decoration: none; font-size: .95rem; opacity: .9; }
.site-nav nav a:hover { opacity: 1; text-decoration: underline; }
.site-nav nav a.portal { background: var(--gold); color: var(--gold-ink); padding: 8px 14px; border-radius: 8px; font-weight: 700; opacity: 1; }
@media (max-width: 640px) { .site-nav nav a:not(.portal) { display: none; } }
.hero { background: linear-gradient(160deg, var(--brand-dark) 0%, var(--brand) 60%, #9a2e3b 100%); color: #fff; padding: 140px 16px 100px; }
.hero .inner { max-width: 1100px; margin: 0 auto; }
.hero .eyebrow { color: var(--gold); font-weight: 700; letter-spacing: .12em; text-transform: uppercase; font-size: .85rem; }
.hero h1 { font-size: clamp(2.2rem, 6vw, 4rem); margin: 12px 0 16px; max-width: 14ch; }
.hero p { font-size: 1.15rem; max-width: 52ch; opacity: .92; }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.hero .btn { background: var(--gold); border-color: var(--gold); color: var(--gold-ink); font-size: 1rem; padding: 12px 22px; }
.hero .btn:hover { background: var(--gold-hover); }
.hero .btn.ghost { background: transparent; border-color: rgba(255,255,255,.6); color: #fff; }
.hero .btn.ghost:hover { background: rgba(255,255,255,.1); }
.section { padding: 72px 16px; }
.section .inner { max-width: 1100px; margin: 0 auto; }
.section.alt { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section h2 { font-size: 2rem; margin-bottom: 12px; }
.section .lede { color: var(--muted); font-size: 1.1rem; max-width: 60ch; margin-bottom: 36px; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }
.stat { border-left: 4px solid var(--gold); padding: 4px 0 4px 16px; }
.stat .num { font-size: 2.2rem; font-weight: 800; color: var(--accent); }
.program h3 { color: var(--accent); }
.portal-band { background: var(--band-bg); color: #fff; }
.portal-band .inner { display: flex; gap: 32px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.portal-band p { color: var(--band-ink); max-width: 55ch; margin: 0; }
.portal-band .btn { background: var(--gold); border-color: var(--gold); color: var(--gold-ink); padding: 12px 22px; }
footer.site { padding: 32px 16px; color: var(--muted); font-size: .9rem; }
footer.site .inner { max-width: 1100px; margin: 0 auto; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: center; }