/* Degen Hub School — clean light theme from the logo: black + mint green on white */
:root {
  --bg: #F6F7F9;
  --card: #FFFFFF;
  --soft: #F1F3F6;
  --line: #E6E8EC;
  --line2: #D4D8DF;
  --text: #121314;
  --muted: #646B76;
  --black: #141414;
  --green: #00DC92;        /* logo "Hub" green — fills, buttons, bars */
  --green-hover: #00C985;
  --green-ink: #00764F;    /* readable green for text on white */
  --green-soft: #E3FAF1;
  --red: #D93A3F;
  --red-soft: #FDECEC;
  --amber: #9A6200;
  --amber-soft: #FFF4DC;
  --r: 14px;
  --shadow: 0 1px 2px rgba(16,24,40,.04), 0 2px 8px rgba(16,24,40,.04);
  --topbar: rgba(255,255,255,.92);
  --placeholder: #A2A8B1;
  color-scheme: light;
  --font: 'Inter', 'Kantumruy Pro', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --head: 'Lexend', 'Kantumruy Pro', 'Inter', system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; min-height: 100vh; display: flex; flex-direction: column; background: var(--bg); color: var(--text); font: 16px/1.6 var(--font); }
a { color: var(--green-ink); text-decoration: none; font-weight: 500; }
a:hover { text-decoration: underline; }
h1, h2, h3 { font-family: var(--head); line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; font-weight: 600; }
h1 { font-size: clamp(26px, 4vw, 34px); font-weight: 700; }
h2 { font-size: 19px; }
h3 { font-size: 16px; }
p { margin: 0 0 1em; }
img { max-width: 100%; }
code, .mono { font-family: ui-monospace, 'SF Mono', Menlo, monospace; font-size: .92em; }
.code { background: var(--soft); border: 1px solid var(--line2); padding: 2px 8px; border-radius: 6px; color: var(--text); user-select: all; }
.muted { color: var(--muted); }
.small { font-size: 13.5px; }
.center { text-align: center; }
.prewrap { white-space: pre-line; }
.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.main { flex: 1; padding-top: 28px; padding-bottom: 64px; }
.inline { display: inline; margin: 0; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.row.tight { gap: 8px; }
.grow { flex: 1; min-width: 0; }

/* header */
.top { position: sticky; top: 0; z-index: 20; background: var(--topbar); backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.brand:hover { text-decoration: none; }
.mark { width: 34px; height: 34px; flex: none; }
.bn { font-family: var(--head); font-size: 19px; font-weight: 700; letter-spacing: -.02em; }
.hub { color: var(--green); }
.bs { font-size: 11px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); background: var(--soft); border: 1px solid var(--line); padding: 2px 8px; border-radius: 999px; }
.nav { display: flex; align-items: center; gap: 20px; font-size: 15px; }
.nav a:not(.btn), .linkbtn { color: var(--muted); font-weight: 500; }
.nav a:not(.btn):hover, .linkbtn:hover { color: var(--text); text-decoration: none; }
.linkbtn { background: none; border: 0; padding: 0; font: inherit; cursor: pointer; }
.nav a.lang { display: inline-grid; place-items: center; min-width: 40px; height: 30px; padding: 0 9px; border: 1px solid var(--line2); border-radius: 8px; font-size: 13px; font-weight: 600; color: var(--text); }
.nav a.lang:hover { border-color: var(--text); }
.nav a.lang[hreflang="km"] { font-family: 'Kantumruy Pro', var(--font); }

/* Khmer: taller lines (stacked vowels/subscripts), no letter-spacing squeeze, Khmer-first font */
:lang(km) body, html:lang(km) body { font-family: 'Kantumruy Pro', 'Inter', system-ui, sans-serif; line-height: 1.75; }
html:lang(km) h1, html:lang(km) h2, html:lang(km) h3, html:lang(km) .bn { font-family: 'Lexend', 'Kantumruy Pro', system-ui, sans-serif; letter-spacing: 0; line-height: 1.45; }
html:lang(km) .hero h1 { line-height: 1.3; font-size: clamp(30px, 5vw, 50px); }
html:lang(km) .eyebrow, html:lang(km) .bs, html:lang(km) .table th { letter-spacing: 0; text-transform: none; }
html:lang(km) .btn { line-height: 1.5; padding-top: 9px; padding-bottom: 9px; }
html:lang(km) .btn.sm { padding-top: 5px; padding-bottom: 5px; }
html:lang(km) input, html:lang(km) select, html:lang(km) textarea { font-family: 'Kantumruy Pro', 'Inter', system-ui, sans-serif; }
/* Khmer glyphs read smaller than Latin at the same size — lift the small text */
html:lang(km) body { font-size: 16.5px; }
html:lang(km) .small, html:lang(km) .crumbs, html:lang(km) .foot, html:lang(km) .stat-l, html:lang(km) .clamp, html:lang(km) .steps p { font-size: 15px; }
html:lang(km) .eyebrow { font-size: 14.5px; font-weight: 600; }
html:lang(km) .opt, html:lang(km) .field-err, html:lang(km) .mock-foot { font-size: 14px; }
html:lang(km) .pill, html:lang(km) .tag, html:lang(km) .chip { font-size: 13.5px; }
html:lang(km) .nav { font-size: 15.5px; }
html:lang(km) .btn { font-size: 16px; }
html:lang(km) .btn.sm { font-size: 14.5px; }
html:lang(km) label { font-size: 15px; }
html:lang(km) .side-list a { font-size: 15px; }
html:lang(km) .bs { font-size: 12.5px; }
.badge { display: inline-grid; place-items: center; min-width: 20px; height: 20px; padding: 0 6px; border-radius: 999px; background: var(--green); color: var(--black); font-size: 12px; font-weight: 700; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--green); color: var(--black); border: 1px solid var(--green);
  border-radius: 10px; padding: 11px 20px; font: 600 15px/1.2 var(--font);
  cursor: pointer; text-decoration: none; white-space: nowrap; transition: background .15s, border-color .15s;
}
.btn:hover { background: var(--green-hover); border-color: var(--green-hover); text-decoration: none; }
.btn.sm { padding: 7px 13px; font-size: 13.5px; border-radius: 8px; }
.btn.block { width: 100%; }
.btn.ghost { background: var(--card); color: var(--text); border-color: var(--line2); }
.btn.ghost:hover { border-color: var(--text); background: var(--card); }
.btn.ok { background: var(--black); border-color: var(--black); color: #fff; }
.btn.ok:hover { background: #333; border-color: #333; }
.btn.danger { background: var(--red); border-color: var(--red); color: #fff; }
.btn.danger.ghost { background: var(--card); color: var(--red); border-color: #F2B8BA; }
.btn.danger.ghost:hover { border-color: var(--red); }
.btn:disabled { opacity: .6; cursor: default; }
.icon-btn { display: grid; place-items: center; width: 28px; height: 22px; background: var(--card); color: var(--muted); border: 1px solid var(--line2); border-radius: 6px; cursor: pointer; padding: 0; }
.icon-btn svg { width: 15px; height: 15px; }
.icon-btn:hover:not(:disabled) { color: var(--text); border-color: var(--text); }
.icon-btn:disabled { opacity: .35; cursor: default; }

/* cards + bits */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 24px; margin-bottom: 20px; box-shadow: var(--shadow); }
.card > h2:not(:first-child), .card > h3:not(:first-child) { margin-top: 26px; }
.narrow { max-width: 620px; margin: 0 auto; }
.narrow.slim { max-width: 420px; }
.flash { border-radius: 10px; padding: 12px 16px; margin: 0 0 18px; border: 1px solid; font-size: 15px; }
.wrap > .flash { margin-top: 20px; margin-bottom: 0; }
.flash.ok { background: var(--green-soft); border-color: #A6EDD3; color: #05543A; }
.flash.warn { background: var(--amber-soft); border-color: #F3D9A0; color: #6B4500; }
.flash.err { background: var(--red-soft); border-color: #F5BCBE; color: #8E1F23; }
.note { background: var(--soft); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; font-size: 14.5px; }
.eyebrow { color: var(--green-ink); font-size: 12.5px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 8px; }
.tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--green-ink); background: var(--green-soft); padding: 2px 9px; border-radius: 999px; }
.pill { display: inline-block; font-size: 12px; font-weight: 600; padding: 2px 10px; border-radius: 999px; text-transform: capitalize; vertical-align: middle; letter-spacing: 0; font-family: var(--font); }
.pill.pending { color: var(--amber); background: var(--amber-soft); }
.pill.approved, .pill.published { color: var(--green-ink); background: var(--green-soft); }
.pill.rejected, .pill.blocked { color: var(--red); background: var(--red-soft); }
.pill.draft { color: var(--muted); background: var(--soft); }
h1 .pill { font-size: 13px; margin-left: 6px; }

.bar { height: 8px; background: var(--soft); border-radius: 999px; overflow: hidden; flex: 1; min-width: 60px; }
.bar > span { display: block; height: 100%; background: var(--green); border-radius: inherit; transition: width .4s; }

/* hero */
.hero { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; padding: 40px 0 32px; }
.hero h1 { font-size: clamp(34px, 5.4vw, 56px); line-height: 1.08; letter-spacing: -.03em; }
.hero h1 em { font-style: normal; background: linear-gradient(transparent 64%, #B5F3DC 64%, #B5F3DC 92%, transparent 92%); }
.lead { font-size: 18px; color: var(--muted); max-width: 32em; margin-bottom: 26px; }
.hero-art { display: flex; justify-content: center; }
.mock { width: 100%; max-width: 380px; border-radius: 18px; background: var(--card); border: 1px solid var(--line); box-shadow: 0 24px 60px -24px rgba(16,24,40,.25); overflow: hidden; }
.mock-video { position: relative; aspect-ratio: 16/10; background: var(--black); display: grid; place-items: center; }
.mock-chart { position: absolute; inset: 22% 6% 14%; width: 88%; height: 64%; opacity: .9; }
.mock-play { position: relative; z-index: 1; width: 56px; height: 56px; border-radius: 50%; background: var(--green); color: var(--black); display: grid; place-items: center; }
.mock-play svg { width: 24px; height: 24px; margin-left: 3px; }
.mock-body { padding: 18px 20px 20px; display: grid; gap: 10px; }
.mock-l1 { height: 12px; width: 70%; background: #E3E6EA; border-radius: 6px; }
.mock-l2 { height: 10px; width: 45%; background: var(--soft); border-radius: 6px; margin-bottom: 6px; }
.mock-foot { display: flex; justify-content: space-between; font-size: 12.5px; color: var(--muted); }

.section { padding: 28px 0 8px; }
.section > h2 { font-size: 24px; margin-bottom: 18px; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.steps li { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 20px; box-shadow: var(--shadow); }
.steps p { color: var(--muted); font-size: 14.5px; margin-bottom: 10px; }
.num { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 9px; background: var(--black); color: var(--green); font-weight: 700; font-family: var(--head); margin-bottom: 12px; }
.broker-links { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { display: inline-block; font-size: 13px; font-weight: 600; padding: 5px 11px; border-radius: 999px; background: var(--green-soft); color: var(--green-ink); }
.chip:hover { background: #CDF6E6; text-decoration: none; }

/* course grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; }
.course-card { display: flex; flex-direction: column; gap: 4px; margin: 0; }
.course-card h3 { font-size: 19px; margin-top: 6px; }
.course-card .btn { align-self: flex-start; margin-top: auto; }
.link-card { color: var(--text); transition: border-color .15s, box-shadow .15s; }
.link-card:hover { text-decoration: none; border-color: var(--line2); box-shadow: 0 8px 24px -12px rgba(16,24,40,.2); }
.cc-top { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.cc-top .muted { margin-left: auto; }
.cc-progress { display: flex; align-items: center; gap: 10px; margin: 6px 0 14px; }
.clamp { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; font-size: 14.5px; }
.locked { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 13.5px; margin-top: auto; }
.locked svg { width: 15px; height: 15px; }

.page-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.page-head h1 { margin: 0; }
.page-head .eyebrow { margin-bottom: 4px; }
.crumbs { font-size: 14px; color: var(--muted); margin-bottom: 14px; }
.crumbs a { color: var(--muted); font-weight: 400; }
.crumbs a:hover { color: var(--text); }

/* course page */
.course-head { display: grid; grid-template-columns: 1fr 260px; gap: 28px; align-items: start; }
.course-side { background: var(--soft); border-radius: 12px; padding: 18px; display: grid; gap: 10px; }
.course-side .bar { background: #E2E5EA; }
.big-pct { font-family: var(--head); font-size: 40px; font-weight: 700; line-height: 1; }
.big-pct small { font-size: 20px; color: var(--muted); }
.course-side p { margin: 0; }
.lesson-list, .side-list { list-style: none; margin: 0; padding: 0; }
.lesson-list.card { padding: 8px; }
.lesson-list a, .side-list a { display: flex; align-items: center; gap: 14px; padding: 12px 14px; border-radius: 10px; color: var(--text); font-weight: 400; }
.lesson-list a:hover, .side-list a:hover { background: var(--soft); text-decoration: none; }
.ln { flex: none; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; border: 1.5px solid var(--line2); font-size: 13px; font-weight: 600; color: var(--muted); background: var(--card); }
.ln svg { width: 16px; height: 16px; }
.done .ln { background: var(--green); border-color: var(--green); color: var(--black); }
.lt { flex: 1; min-width: 0; font-weight: 500; }
.ld { font-size: 13px; color: var(--muted); }
.pad { padding: 14px; }

/* lesson page */
.lesson-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 24px; align-items: start; }
.player { position: relative; aspect-ratio: 16/9; background: #000; border-radius: var(--r); overflow: hidden; }
.player video, .player iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: #000; }
.player:fullscreen { border-radius: 0; aspect-ratio: auto; }
.player.empty { display: grid; place-content: center; justify-items: center; color: #9AA1AC; background: var(--black); }
.player.empty svg { width: 36px; height: 36px; }
.player.empty p { margin: 8px 0 0; }
.wm { position: absolute; left: 6%; top: 8%; z-index: 2; pointer-events: none; user-select: none; font-size: 13px; font-weight: 600; color: rgba(255,255,255,.24); text-shadow: 0 1px 2px rgba(0,0,0,.35); transition: left 1.5s ease, top 1.5s ease; white-space: nowrap; }
.fs-btn { position: absolute; right: 10px; top: 10px; z-index: 3; width: 34px; height: 34px; border-radius: 8px; border: 0; background: rgba(0,0,0,.5); color: #fff; font-size: 18px; cursor: pointer; opacity: 0; transition: opacity .2s; }
.player:hover .fs-btn, .fs-btn:focus { opacity: 1; }
.lesson-info { padding: 22px 2px 0; }
.lesson-desc { color: var(--text); background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; margin-bottom: 18px; }
.lesson-actions { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.lesson-actions form { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.done-tag { display: inline-flex; align-items: center; gap: 6px; color: var(--green-ink); font-weight: 600; }
.done-tag svg { width: 18px; height: 18px; }
.lesson-side { padding: 0; position: sticky; top: 84px; max-height: calc(100vh - 104px); display: flex; flex-direction: column; }
.side-head { padding: 18px 18px 14px; border-bottom: 1px solid var(--line); }
.side-head .cc-progress { margin: 10px 0 0; }
.side-list { overflow-y: auto; padding: 8px; }
.side-list a { padding: 9px 10px; gap: 10px; font-size: 14.5px; }
.side-list .ln { width: 26px; height: 26px; font-size: 12px; }
.side-list a.current { background: var(--green-soft); }
.side-list a.current .lt { font-weight: 600; }

/* forms */
.form { display: grid; gap: 16px; }
.form > .btn:not(.block) { justify-self: start; }
.form-card h1 { margin-bottom: 6px; }
label { display: block; font-size: 14px; font-weight: 600; color: var(--text); }
label > input, label > select, label > textarea { display: block; margin-top: 6px; }
label > .field-err { display: block; margin-top: 4px; }
.opt { font-weight: 400; color: var(--muted); font-size: 12.5px; }
input:not([type=checkbox]):not([type=radio]), select, textarea {
  width: 100%; background: var(--card); color: var(--text); border: 1px solid var(--line2); border-radius: 10px;
  padding: 11px 13px; font: 15px/1.4 var(--font); transition: border-color .15s, box-shadow .15s;
}
input::placeholder, textarea::placeholder { color: var(--placeholder); }
input[type=file] { padding: 9px; font-size: 14px; background: var(--soft); }
textarea { resize: vertical; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--green-ink); box-shadow: 0 0 0 3px rgba(0,220,146,.25); }
.btn:focus-visible, a:focus-visible, .icon-btn:focus-visible, .linkbtn:focus-visible { outline: 2px solid var(--green-ink); outline-offset: 2px; }
.field-err { color: var(--red); font-size: 13px; font-weight: 500; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.check, .radio { display: flex; align-items: center; gap: 8px; font-weight: 500; cursor: pointer; }
.check input, .radio input { width: 17px; height: 17px; accent-color: var(--green-ink); }
fieldset { border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin: 0; display: grid; gap: 12px; }
legend { padding: 0 6px; font-weight: 600; font-size: 14px; }
.radio { background: var(--card); border: 1px solid var(--line2); padding: 8px 12px; border-radius: 10px; font-size: 14px; }
.radio:has(input:checked) { border-color: var(--green-ink); background: var(--green-soft); }
.vt { display: grid; gap: 6px; }
.vt[hidden] { display: none; }
.vt p { margin: 0; }
.upload-progress { display: flex; align-items: center; gap: 12px; }
.upload-progress[hidden] { display: none; }
.danger-zone { margin-top: 22px; padding-top: 18px; border-top: 1px dashed var(--line2); }

/* status page */
.status-card { padding: 44px 28px; }
.status-icon { width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; margin: 0 auto 18px; background: var(--amber-soft); color: var(--amber); }
.status-card.rejected .status-icon, .status-card.blocked .status-icon { background: var(--red-soft); color: var(--red); }
.status-icon svg { width: 30px; height: 30px; }

/* account / admin */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }
.two-col .card { margin: 0; }
.dl { display: grid; grid-template-columns: 130px 1fr; gap: 8px 14px; margin: 0 0 18px; font-size: 15px; }
.dl dt { color: var(--muted); }
.dl dd { margin: 0; overflow-wrap: anywhere; }
.subnav { display: flex; gap: 4px; flex-wrap: wrap; align-items: center; margin-bottom: 22px; padding: 4px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); }
.subnav a { padding: 8px 14px; border-radius: 9px; color: var(--muted); font-size: 14.5px; }
.subnav a:hover { color: var(--text); text-decoration: none; }
.subnav a.on { background: var(--black); color: #fff; }
.subnav .preview-link { margin-left: auto; color: var(--green-ink); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 20px; }
.stat { display: grid; gap: 2px; margin: 0; color: var(--text); }
.stat:hover { text-decoration: none; border-color: var(--line2); }
.stat-n { font-family: var(--head); font-size: 34px; font-weight: 700; line-height: 1.15; }
.stat-l { color: var(--muted); font-size: 14px; font-weight: 400; }
.stat.hot { border-color: var(--green); box-shadow: 0 0 0 3px var(--green-soft); }
.table-wrap { overflow-x: auto; margin: 0 -8px; }
.table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.table th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 600; padding: 8px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.table td { padding: 12px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.table tr:last-child td { border-bottom: 0; }
.table td a strong { color: var(--text); }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.tabs a { padding: 6px 13px; border-radius: 999px; border: 1px solid var(--line2); background: var(--card); color: var(--muted); font-size: 14px; text-transform: capitalize; }
.tabs a span { opacity: .7; margin-left: 2px; }
.tabs a.on { border-color: var(--black); background: var(--black); color: #fff; }
.tabs a:hover { text-decoration: none; color: var(--text); }
.tabs a.on:hover { color: #fff; }
.search { display: flex; gap: 8px; }
.search input { width: 260px; padding: 8px 12px; }
.admin-list { list-style: none; margin: 0; padding: 0; }
.admin-list li { display: flex; align-items: center; gap: 14px; padding: 12px 6px; border-bottom: 1px solid var(--line); }
.admin-list li:last-child { border-bottom: 0; }
.admin-list .grow { color: var(--text); font-weight: 400; }
.order { display: grid; gap: 3px; }
.proof { border-radius: 10px; border: 1px solid var(--line2); max-height: 360px; object-fit: contain; background: var(--soft); }
.prog-row { display: grid; grid-template-columns: 1fr 120px auto; gap: 12px; align-items: center; font-size: 14.5px; margin-bottom: 10px; }

/* footer */
.foot { border-top: 1px solid var(--line); background: var(--card); padding: 22px 0; font-size: 13.5px; color: var(--muted); }
.foot-in { display: flex; gap: 20px; flex-wrap: wrap; justify-content: space-between; }

/* responsive */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; gap: 28px; }
  .hero-art { display: none; }
  .steps { grid-template-columns: 1fr 1fr; }
  .lesson-grid { grid-template-columns: 1fr; }
  .lesson-side { position: static; max-height: none; }
  .stats { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .wrap { padding: 0 16px; }
  .main { padding-top: 18px; }
  .nav { gap: 12px; font-size: 14px; }
  .bs { display: none; }
  .card { padding: 18px; }
  .steps, .two, .two-col { grid-template-columns: 1fr; }
  .course-head { grid-template-columns: 1fr; }
  .search { width: 100%; }
  .search input { width: 100%; }
  .subnav .preview-link { margin-left: 0; }
  .player { border-radius: 12px; }
  .dl { grid-template-columns: 110px 1fr; }
  .table thead { display: none; }
  .table, .table tbody, .table tr, .table td { display: block; width: 100%; }
  .table tr { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .table td { border: 0; padding: 3px 8px; }
}
.nav a, .nav .linkbtn { white-space: nowrap; }
@media (max-width: 480px) {
  .bn { display: none; }
  .nav a.lang { min-width: 34px; height: 28px; padding: 0 6px; }
}
@media (max-width: 400px) {
  .nav a[href="/login"] { display: none; }
  .nav { gap: 10px; font-size: 13.5px; }
  .bn { font-size: 16px; }
  .mark { width: 30px; height: 30px; }
}
/* ── v2: free + member access ── */
.btn svg { width: 15px; height: 15px; vertical-align: -2px; }
.tag.members { color: #fff; background: var(--black); }
.pill.free { color: var(--muted); background: var(--soft); }
.pill.broker, .pill.paid { color: var(--green-ink); background: var(--green-soft); }
.pill.admin { color: #fff; background: var(--black); }
.pill.preview { color: var(--green-ink); background: var(--green-soft); text-transform: none; font-size: 11.5px; }
.flash svg { width: 16px; height: 16px; vertical-align: -3px; }
.lesson-list a.is-locked .lt, .side-list a.is-locked .lt { color: var(--muted); }
.lesson-list a.is-locked .ln, .side-list a.is-locked .ln { background: var(--soft); border-style: dashed; }
.side-lock { width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center; background: var(--black); color: var(--green); }
.side-lock svg { width: 22px; height: 22px; }
.locked-panel { display: grid; place-items: center; background: radial-gradient(120% 120% at 50% 0%, #22262B 0%, #0E0F11 70%); color: #fff; text-align: center; }
.locked-panel .lp-in { max-width: 420px; padding: 24px; display: grid; justify-items: center; gap: 6px; }
.locked-panel h2 { color: #fff; font-size: 22px; margin: 6px 0 0; }
.locked-panel p { color: #B9C0CA; margin: 0 0 10px; }
.locked-panel .lp-icon { width: 54px; height: 54px; border-radius: 50%; display: grid; place-items: center; background: var(--green); color: var(--black); }
.locked-panel .lp-icon svg { width: 26px; height: 26px; }
.locked-panel .lp-cta { display: grid; gap: 8px; width: 100%; max-width: 300px; }
.locked-panel .lp-cta .muted, .locked-panel .lp-cta a:not(.btn) { color: #B9C0CA; }
.lead-sm { font-size: 16px; margin: -6px 0 18px; }
.unlock-card { position: relative; display: grid; gap: 10px; align-content: start; }
.unlock-card h2 { margin: 0; padding-right: 40px; }
.unlock-card p { margin: 0; }
.uc-num { position: absolute; top: 18px; right: 18px; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--green); color: var(--black); font-weight: 700; }
.pay-qr { width: 100%; max-width: 260px; border-radius: 12px; border: 1px solid var(--line2); background: #fff; justify-self: center; }
.pay-qr.sm { max-width: 140px; }
.qr-row { display: flex; gap: 18px; align-items: flex-start; flex-wrap: wrap; }
.pay-log { margin: 10px 0 0; padding-left: 18px; }
.course-card .locked { margin-top: 8px; }
@media (max-width: 720px) {
  .locked-panel { aspect-ratio: auto; min-height: 300px; }
}
@media (max-width: 480px) {
  .nav .nav-logout, .nav .nav-hide-sm { display: none; }
  .nav { gap: 10px; }
  .theme-btn { width: 30px; height: 28px; }
}
/* ── v4: team + 2-step ── */
.qr-box { display: grid; place-items: center; margin: 6px auto 4px; }
.qr-box svg { width: 220px; height: 220px; background: #fff; border: 1px solid var(--line2); border-radius: 12px; padding: 6px; }
.code.secret { font-size: 13px; letter-spacing: .5px; word-break: break-all; }
.code-input { font-size: 22px; letter-spacing: 6px; text-align: center; font-variant-numeric: tabular-nums; }
.sec-steps { margin: 0 0 10px; padding-left: 20px; display: grid; gap: 4px; }
.backup-codes { list-style: none; padding: 0; margin: 14px 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.backup-codes code { display: block; text-align: center; font-size: 16px; padding: 8px; background: var(--soft); border: 1px dashed var(--line2); border-radius: 8px; }
.status-icon.ok-icon { background: var(--green-soft); color: var(--green-ink); }
/* ── v5: professional home page ── */
.main-wide { flex: 1; }
.btn.lg { padding: 14px 24px; font-size: 16px; border-radius: 12px; }
.btn.ghost-dark { background: transparent; color: #fff; border-color: rgba(255,255,255,.28); }
.btn.ghost-dark:hover { background: rgba(255,255,255,.08); border-color: #fff; }

.h-hero { position: relative; overflow: hidden; background: #0B0D0C; color: #fff; padding: 72px 0 120px; }
.h-hero::before { content: ""; position: absolute; inset: 0; background:
  radial-gradient(600px 380px at 85% 20%, rgba(0,220,146,.20), transparent 70%),
  radial-gradient(500px 300px at 0% 100%, rgba(0,220,146,.10), transparent 70%),
  linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px) 0 0 / 100% 44px,
  linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px) 0 0 / 44px 100%; }
.h-hero-in { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.h-hero-in > * { min-width: 0; }
.h-kicker { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; letter-spacing: .04em; color: #B9F5DE; background: rgba(0,220,146,.10); border: 1px solid rgba(0,220,146,.25); padding: 6px 12px; border-radius: 999px; margin-bottom: 22px; }
.h-kicker .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(0,220,146,.2); }
.h-hero h1 { font-size: clamp(36px, 5.6vw, 62px); line-height: 1.05; letter-spacing: -.035em; color: #fff; margin-bottom: 20px; }
html:lang(km) .h-hero h1 { line-height: 1.3; letter-spacing: 0; }
.h-hero h1 em { font-style: normal; color: var(--green); }
.h-lead { font-size: 18px; color: #AEB6BF; max-width: 34em; margin-bottom: 28px; }
.h-points { list-style: none; padding: 0; margin: 26px 0 0; display: flex; flex-wrap: wrap; gap: 10px 22px; color: #D3D8DD; font-size: 14.5px; }
.h-points li { display: inline-flex; align-items: center; gap: 7px; }
.h-points svg { width: 17px; height: 17px; color: var(--green); }

.h-hero-art { position: relative; display: flex; justify-content: center; }
.h-player { width: 100%; max-width: 440px; background: var(--card); color: var(--text); border-radius: 18px; overflow: hidden; box-shadow: 0 40px 80px -30px rgba(0,0,0,.6), 0 0 0 1px rgba(255,255,255,.06); transform: rotate(-1.2deg); }
.h-screen { position: relative; aspect-ratio: 16/9; background: #000; }
.h-screen > svg, .h-screen > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.h-play { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: 62px; height: 62px; border-radius: 50%; background: var(--green); color: var(--black); display: grid; place-items: center; box-shadow: 0 0 0 10px rgba(0,220,146,.18); }
.h-play svg { width: 26px; height: 26px; margin-left: 3px; }
.h-player-body { padding: 16px 18px 18px; }
.h-ptitle { font-family: var(--head); font-weight: 600; font-size: 15.5px; margin-bottom: 10px; }
.h-plist { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.h-plist li { display: flex; align-items: center; gap: 10px; font-size: 13.5px; padding: 7px 8px; border-radius: 8px; color: var(--muted); }
.h-plist li.on { background: var(--green-soft); color: var(--text); font-weight: 500; }
.h-plist .n { flex: none; width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; font-size: 11px; font-weight: 700; border: 1.5px solid var(--line2); }
.h-plist li.on .n { background: var(--green); border-color: var(--green); color: var(--black); }
.h-plist .n svg { width: 12px; height: 12px; }
.h-plist .tt { flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.h-plist .d { font-size: 12px; }
.h-float { position: absolute; display: inline-flex; align-items: center; gap: 8px; background: var(--card); color: var(--text); font-size: 13px; font-weight: 600; padding: 9px 13px; border-radius: 12px; box-shadow: 0 14px 30px -12px rgba(0,0,0,.5); }
.h-float svg { width: 18px; height: 18px; color: var(--green-ink); }
.h-float-1 { left: -6px; top: 18%; }
.h-float-2 { right: -4px; bottom: 12%; }

.h-stats { position: relative; margin-top: -64px; z-index: 2; }
.h-stats-in { display: grid; grid-template-columns: repeat(4, 1fr); background: var(--card); border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 20px 50px -24px rgba(16,24,40,.25); padding: 0; }
.h-stats-in > div { padding: 24px 26px; display: grid; gap: 2px; }
.h-stats-in > div + div { border-left: 1px solid var(--line); }
.h-stats b { font-family: var(--head); font-size: 32px; line-height: 1.1; letter-spacing: -.02em; }
.h-stats span { color: var(--muted); font-size: 14px; }

.h-section { padding: 80px 0 16px; }
.h-section h2 { font-size: clamp(26px, 3.4vw, 36px); letter-spacing: -.02em; margin-bottom: 8px; }
.h-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; margin-bottom: 30px; flex-wrap: wrap; }
.h-head p.muted { margin: 0; max-width: 40em; }
.center-head { justify-content: center; text-align: center; }
.center-head p.muted { margin: 0 auto; }

.cgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 22px; }
.ccard { display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; color: var(--text); font-weight: 400; box-shadow: var(--shadow); transition: transform .18s ease, box-shadow .18s ease; }
.ccard:hover { text-decoration: none; transform: translateY(-3px); box-shadow: 0 22px 40px -22px rgba(16,24,40,.35); }
.ccard-cover { position: relative; aspect-ratio: 16/9; background: #0E1613; overflow: hidden; }
.ccard-cover > svg, .ccard-cover > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.ccard-badge { position: absolute; left: 12px; top: 12px; display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 999px; background: rgba(10,12,11,.78); color: #fff; backdrop-filter: blur(6px); }
.ccard-badge.free { background: var(--green); color: var(--black); }
.ccard-badge svg { width: 12px; height: 12px; }
.ccard-body { flex: 1; display: flex; flex-direction: column; gap: 6px; padding: 18px 20px 20px; }
.ccard-meta { display: flex; flex-wrap: wrap; gap: 4px 0; font-size: 13px; color: var(--muted); }
.ccard-meta > span + span::before { content: "·"; margin: 0 8px; }
.ccard h3 { font-size: 18.5px; margin: 2px 0 0; line-height: 1.3; }
.ccard .clamp { margin: 0; font-size: 14.5px; }
.ccard-note { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--green-ink); font-weight: 600; }
.ccard-note svg { width: 13px; height: 13px; }
.ccard-go { margin-top: auto; padding-top: 10px; font-weight: 600; color: var(--green-ink); font-size: 14.5px; }
.ccard .cc-progress { margin-top: 4px; }

.h-why { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding-bottom: 72px; margin-top: 80px; }
.fgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.fitem { padding: 24px; border: 1px solid var(--line); border-radius: 16px; background: var(--bg); }
.fitem h3 { font-size: 17px; margin: 14px 0 6px; }
.fitem p { margin: 0; font-size: 14.5px; }
.ficon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--black); color: var(--green); }
.ficon svg { width: 22px; height: 22px; }

.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; max-width: 880px; margin: 0 auto; }
.plan { position: relative; display: flex; flex-direction: column; gap: 6px; padding: 30px; border: 1px solid var(--line); border-radius: 20px; background: var(--card); box-shadow: var(--shadow); }
.plan h3 { font-size: 18px; margin: 0; }
.plan-price { font-family: var(--head); font-size: 40px; font-weight: 700; letter-spacing: -.02em; line-height: 1.15; }
.plan-price small { font-size: 15px; font-weight: 500; color: var(--muted); letter-spacing: 0; }
.plan ul { list-style: none; padding: 0; margin: 12px 0 22px; display: grid; gap: 10px; }
.plan li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; }
.plan li svg { flex: none; width: 18px; height: 18px; margin-top: 3px; color: var(--green-ink); }
.plan .btn { margin-top: auto; }
.plan-pro { background: #0B0D0C; color: #fff; border-color: #0B0D0C; box-shadow: 0 30px 60px -30px rgba(0,0,0,.55); }
.plan-pro li svg { color: var(--green); }
.plan-alt { color: #AEB6BF; font-size: 14px; margin: 0; }
.plan-alt a { color: var(--green); }
.plan-tag { position: absolute; top: 20px; right: 20px; font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 999px; background: var(--green); color: var(--black); }

.narrow-wrap { max-width: 780px; }
.faq { background: var(--card); border: 1px solid var(--line); border-radius: 14px; margin-bottom: 10px; padding: 0 20px; }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 18px 0; font-weight: 600; font-family: var(--head); font-size: 16.5px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; background: var(--soft); font-size: 18px; font-weight: 500; }
.faq[open] summary::after { content: "–"; background: var(--green); }
.faq p { color: var(--muted); margin: -4px 0 18px; }

.h-cta { margin-top: 80px; background: #0B0D0C; color: #fff; position: relative; overflow: hidden; }
.h-cta::before { content: ""; position: absolute; inset: 0; background: radial-gradient(500px 260px at 90% 50%, rgba(0,220,146,.22), transparent 70%); }
.h-cta-in { position: relative; display: flex; justify-content: space-between; align-items: center; gap: 28px; padding-top: 56px; padding-bottom: 56px; flex-wrap: wrap; }
.h-cta h2 { color: #fff; font-size: clamp(24px, 3vw, 32px); margin-bottom: 6px; }
.h-cta p { color: #AEB6BF; margin: 0; }

.foot { padding: 0; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; padding-top: 40px; padding-bottom: 28px; }
.foot-grid h4 { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--text); margin: 6px 0 12px; }
.foot-grid > div > a:not(.brand) { display: block; color: var(--muted); font-weight: 400; margin-bottom: 8px; }
.foot-grid > div > a:not(.brand):hover { color: var(--text); }
.foot-brand p { margin: 12px 0 0; max-width: 28em; }
.foot-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 16px; padding-bottom: 22px; font-size: 13px; color: var(--muted); }

.cover-edit { display: grid; grid-template-columns: 240px 1fr; gap: 18px; align-items: start; }
.cover-edit .ccard-cover { border-radius: 12px; }

@media (max-width: 960px) {
  .h-hero { padding: 48px 0 104px; }
  .h-hero-in { grid-template-columns: 1fr; gap: 40px; }
  .h-float { display: none; }
  .h-player { transform: none; }
  .fgrid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .h-stats-in { grid-template-columns: 1fr 1fr; }
  .h-stats-in > div:nth-child(3) { border-left: 0; }
  .h-stats-in > div:nth-child(n+3) { border-top: 1px solid var(--line); }
  .h-stats-in > div { padding: 18px; }
  .h-stats b { font-size: 26px; }
  .h-section { padding-top: 56px; }
  .h-why { margin-top: 56px; padding-bottom: 56px; }
  .fgrid, .plans { grid-template-columns: 1fr; }
  .plan { padding: 24px; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .foot-brand { grid-column: 1 / -1; }
  .cover-edit { grid-template-columns: 1fr; }
  .h-cta { margin-top: 56px; }
  .h-lead { font-size: 16.5px; }
  .cgrid { grid-template-columns: 1fr; }
}
/* ── Dark mode: html[data-theme="dark"] (set from the visitor's choice, or their device setting) ── */
:root[data-theme="dark"] {
  --bg: #0C0E0D;
  --card: #151817;
  --soft: #1C201E;
  --line: #262B29;
  --line2: #343A37;
  --text: #E9EDEB;
  --muted: #9AA39F;
  --green-hover: #1BE6A1;
  --green-ink: #34E0A6;
  --green-soft: rgba(0,220,146,.13);
  --red: #FF6B70;
  --red-soft: rgba(255,107,112,.13);
  --amber: #F2B74B;
  --amber-soft: rgba(242,183,75,.12);
  --shadow: 0 1px 2px rgba(0,0,0,.45), 0 4px 14px rgba(0,0,0,.25);
  --topbar: rgba(12,14,13,.86);
  --placeholder: #69716D;
  color-scheme: dark;
}
[data-theme="dark"] .mark { filter: invert(1); }
[data-theme="dark"] .btn.ok, [data-theme="dark"] .subnav a.on, [data-theme="dark"] .tabs a.on,
[data-theme="dark"] .tag.members, [data-theme="dark"] .pill.admin { background: #EEF1EF; border-color: #EEF1EF; color: #0A0B0B; }
[data-theme="dark"] .btn.ok:hover { background: #fff; border-color: #fff; }
[data-theme="dark"] .tabs a.on:hover { color: #0A0B0B; }
[data-theme="dark"] .btn.danger.ghost { border-color: rgba(255,107,112,.45); }
[data-theme="dark"] .flash.ok { border-color: rgba(0,220,146,.35); color: #8EF0CB; }
[data-theme="dark"] .flash.warn { border-color: rgba(242,183,75,.35); color: #F5CF85; }
[data-theme="dark"] .flash.err { border-color: rgba(255,107,112,.35); color: #FFB3B6; }
[data-theme="dark"] .chip:hover { background: rgba(0,220,146,.22); }
[data-theme="dark"] .course-side .bar, [data-theme="dark"] .mock-l1 { background: #2A302D; }
[data-theme="dark"] .h-hero, [data-theme="dark"] .h-cta { background: #060807; border-bottom: 1px solid var(--line); }
[data-theme="dark"] .h-cta { border-top: 1px solid var(--line); }
[data-theme="dark"] .plan-pro { background: #060807; border-color: rgba(0,220,146,.4); }
[data-theme="dark"] .ficon { background: rgba(0,220,146,.12); }
[data-theme="dark"] .h-stats-in, [data-theme="dark"] .h-player { box-shadow: 0 24px 60px -24px rgba(0,0,0,.8), 0 0 0 1px var(--line); }
[data-theme="dark"] .ccard-badge.free { color: #0A0B0B; }
[data-theme="dark"] .pay-qr, [data-theme="dark"] .qr-box svg { border-color: transparent; } /* QR codes stay on white so phones can scan them */

/* theme switch button */
.theme-btn { display: inline-grid; place-items: center; width: 34px; height: 30px; padding: 0; border: 1px solid var(--line2); border-radius: 8px; background: transparent; color: var(--text); cursor: pointer; }
.theme-btn:hover { border-color: var(--text); }
.theme-btn svg { width: 17px; height: 17px; }
.theme-btn .i-sun { display: none; }
[data-theme="dark"] .theme-btn .i-sun { display: block; }
[data-theme="dark"] .theme-btn .i-moon { display: none; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}
.form label .small { display: block; font-weight: 400; margin-top: 4px; }