/* ===== brabi.in Academy — Web Dev track shared theme ===== */
:root {
  --bg: #0f172a; --panel: #1e293b; --panel2: #273449; --border: #334155;
  --text: #e2e8f0; --muted: #94a3b8; --blue: #38bdf8; --green: #4ade80;
  --yellow: #facc15; --orange: #fb923c; --pink: #f472b6; --purple: #a78bfa;
  --red: #f87171; --code-bg: #0b1220; --accent: var(--yellow);
  --mono: 'Cascadia Code', Consolas, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', system-ui, sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }

nav.topnav { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; padding: 10px 18px;
  background: rgba(15,23,42,.95); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50; }
nav.topnav .brand { font-weight: 800; color: #fff; margin-right: 12px; text-decoration: none; }
nav.topnav .brand .logo { color: var(--accent); }
nav.topnav a.nl { color: var(--muted); text-decoration: none; font-size: 13px; padding: 4px 9px; border-radius: 7px; }
nav.topnav a.nl:hover { color: #fff; background: var(--panel2); }
nav.topnav a.nl.active { color: var(--accent); background: var(--panel2); }
nav.topnav a.nl.visited-page::before { content: '✓ '; color: var(--green); }

.wrap { max-width: 940px; margin: 0 auto; padding: 30px 22px 80px; }
.hero { padding: 22px 0 10px; }
.hero .kicker { font-size: 12px; letter-spacing: 2px; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.hero h1 { color: #fff; font-size: 30px; margin: 8px 0; }
.hero h1 .grad { background: linear-gradient(90deg, var(--yellow), var(--orange)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lede { color: var(--muted); font-size: 15.5px; max-width: 720px; }

h2 { color: #fff; font-size: 22px; margin: 30px 0 10px; display: flex; align-items: center; gap: 10px; }
h2 .num { background: var(--panel2); color: var(--accent); font-size: 14px; width: 30px; height: 30px; border-radius: 8px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--border); }
h3 { color: var(--accent); font-size: 16.5px; margin: 18px 0 8px; }
p { margin-bottom: 10px; font-size: 15px; }
.note-sm { color: var(--muted); font-size: 13.5px; }
ul, ol { margin: 8px 0 12px 22px; }
li { margin: 4px 0; }

.card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; margin: 14px 0; }
.hint { background: var(--panel2); border-left: 3px solid var(--yellow); border-radius: 0 8px 8px 0; padding: 11px 15px; margin: 13px 0; font-size: 14px; color: var(--muted); }
.hint b { color: var(--text); }
.callout { border-radius: 0 10px 10px 0; padding: 13px 16px; margin: 14px 0; font-size: 14.5px; }
.callout .ct { display: block; font-weight: 800; margin-bottom: 4px; }
.callout.tip { background: rgba(56,189,248,.08); border-left: 3px solid var(--blue); }
.callout.tip .ct { color: var(--blue); }
.callout.warn { background: rgba(248,113,113,.08); border-left: 3px solid var(--red); }
.callout.warn .ct { color: var(--red); }
.callout.ok { background: rgba(74,222,128,.08); border-left: 3px solid var(--green); }
.callout.ok .ct { color: var(--green); }

code { font-family: var(--mono); font-size: .9em; background: var(--panel2); border: 1px solid var(--border); border-radius: 5px; padding: 1px 6px; color: #ffd48a; }
pre { background: var(--code-bg); border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; overflow-x: auto; font-family: var(--mono); font-size: 13.5px; line-height: 1.6; margin: 12px 0; position: relative; }
pre code { background: none; border: none; padding: 0; color: #d6deef; font-size: 13.5px; }
.tok-k { color: var(--pink); } .tok-s { color: var(--green); } .tok-c { color: #6b7a99; font-style: italic; }
.tok-n { color: var(--orange); } .tok-f { color: var(--blue); } .tok-p { color: #9aa8c7; }
.copybtn { position: absolute; top: 8px; right: 8px; background: var(--panel2); color: var(--muted); border: 1px solid var(--border); border-radius: 6px; padding: 3px 9px; font-size: 11px; cursor: pointer; }
.copybtn.copied { color: var(--green); border-color: var(--green); }

table.tbl { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 14px; }
table.tbl th { background: var(--panel2); color: var(--accent); text-align: left; padding: 8px 12px; border-bottom: 2px solid var(--border); }
table.tbl td { padding: 7px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }

/* ---- live code runner ---- */
.runner { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; margin: 14px 0; background: var(--panel); }
.runner-head { display: flex; align-items: center; gap: 8px; padding: 7px 12px; background: var(--panel2); border-bottom: 1px solid var(--border); font-size: 12px; color: var(--muted); }
.runner-head .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--green); }
.runner textarea { width: 100%; min-height: 120px; background: var(--code-bg); color: var(--text); border: none; outline: none; resize: vertical; padding: 12px 14px; font-family: var(--mono); font-size: 13.5px; line-height: 1.55; }
.runner-bar { display: flex; align-items: center; gap: 10px; padding: 8px 12px; background: var(--panel2); border-top: 1px solid var(--border); }
.runner-bar .run { background: var(--green); color: #05230f; font-weight: 800; border: none; border-radius: 8px; padding: 8px 20px; cursor: pointer; font-size: 13.5px; }
.runner-bar .reset { background: transparent; color: var(--muted); border: 1px solid var(--border); border-radius: 8px; padding: 8px 14px; cursor: pointer; font-size: 12.5px; }
.runner-bar .kbd { font-size: 11.5px; color: var(--muted); }
.runner-out { display: none; background: #060a14; border-top: 1px solid var(--border); padding: 10px 14px; font-family: var(--mono); font-size: 13px; white-space: pre-wrap; word-break: break-word; color: #cfe0ff; max-height: 260px; overflow: auto; }
.runner-out.show { display: block; }
.runner-out .err { color: var(--red); }
.runner-out .sys { color: var(--muted); font-style: italic; }
.runner-preview { display: none; border-top: 1px solid var(--border); background: #fff; }
.runner-preview.show { display: block; }
.runner-preview iframe { width: 100%; border: none; min-height: 140px; background: #fff; }

/* ---- quiz + progress (shared with python/nginx pattern) ---- */
.oneline { border: 1px solid var(--border); border-left: 3px solid var(--green); background: var(--panel); border-radius: 0 8px 8px 0; padding: 9px 14px; margin: 6px 0 16px; font-size: 14px; color: var(--muted); }
.oneline b { color: var(--green); }
.quiz { border: 1px solid var(--blue); border-radius: 12px; padding: 18px 20px; margin: 22px 0; background: var(--panel); }
.quiz .q-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.quiz h3 { color: var(--blue); margin: 0; }
.q-item { margin: 14px 0 18px; }
.q-text { font-weight: 600; margin-bottom: 8px; }
.q-opt { display: block; margin: 6px 0; padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; cursor: pointer; font-size: 14px; background: var(--panel2); }
.q-opt:hover { border-color: var(--blue); }
.q-opt.correct { border-color: var(--green); background: rgba(74,222,128,.1); }
.q-opt.wrong { border-color: var(--red); background: rgba(248,113,113,.1); }
.q-expl { display: none; font-size: 13.5px; color: var(--muted); margin-top: 6px; }
.q-expl.show { display: block; }
.q-check { background: var(--blue); color: #082f49; border: none; padding: 9px 18px; border-radius: 8px; font-weight: 700; cursor: pointer; }
.q-score { display: inline-block; margin-left: 12px; font-weight: 700; }
.q-score.pass { color: var(--green); } .q-score.fail { color: var(--yellow); }

.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; }
.cardlink { text-decoration: none; color: inherit; }
.card.hoverable { transition: border-color .15s, transform .15s; }
.cardlink:hover .card.hoverable { border-color: var(--accent); transform: translateY(-2px); }
.badge { display: inline-block; padding: 1px 9px; border-radius: 12px; font-size: 11px; font-weight: 700; }
.badge.new { background: rgba(74,222,128,.15); color: var(--green); }
.badge.free { background: rgba(74,222,128,.15); color: var(--green); }
.progressbar { height: 9px; background: var(--panel2); border-radius: 6px; overflow: hidden; margin: 6px 0; }
.progressbar > div { height: 100%; background: linear-gradient(90deg, var(--yellow), var(--orange)); }
.tbl.prog td, .tbl.prog th { font-size: 13px; }

.meet { border: 1px solid var(--border); border-radius: 12px; background: var(--panel); margin: 16px 0; padding: 0; }
.meet summary { cursor: pointer; padding: 13px 18px; font-size: 14.5px; list-style: none; }
.meet summary::-webkit-details-marker { display: none; }
.meet .md { padding: 0 18px 16px; }

.pagenav { display: flex; justify-content: space-between; gap: 12px; margin-top: 34px; }
.pagenav a { flex: 1; text-decoration: none; border: 1px solid var(--border); border-radius: 10px; padding: 13px 16px; color: var(--text); background: var(--panel); }
.pagenav a:hover { border-color: var(--accent); }
.pagenav a.next { text-align: right; }
.pagenav .pn-dir { font-size: 12px; color: var(--muted); display: block; }
.pagenav .pn-t { font-weight: 700; color: #fff; }
@media (max-width: 700px) { nav.topnav a.nl { font-size: 12px; padding: 3px 6px; } }