/* CRE342 student site: same palette as the lecture decks */
@font-face { font-family: "Inter"; src: url(../lib/fonts/inter-latin-wght-normal.woff2) format("woff2"); font-weight: 100 900; }
@font-face { font-family: "Space Grotesk"; src: url(../lib/fonts/space-grotesk-latin-wght-normal.woff2) format("woff2"); font-weight: 300 700; }
@font-face { font-family: "JetBrains Mono"; src: url(../lib/fonts/jetbrains-mono-latin-wght-normal.woff2) format("woff2"); font-weight: 100 800; }

:root {
  --bg: #0b1026; --bg-2: #111936; --panel: #151f45; --line: #2a3768;
  --ink: #eef2ff; --ink-2: #c3cbe6; --muted: #8d98bf;
  --blue: #3aa8ff; --coral: #ff6b6b; --mint: #4fd1a5; --gold: #ffc53d; --violet: #a58bff;
  --display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --body: "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: radial-gradient(900px 500px at 90% -10%, #16255c 0%, transparent 60%), var(--bg); color: var(--ink); font: 17px/1.55 var(--body); min-height: 100vh; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; border-radius: 6px; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }

header.site { border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 16px; padding-bottom: 16px; }
header.site .brand { font-family: var(--mono); font-size: 13px; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-2); }
header.site nav { display: flex; gap: 18px; flex-wrap: wrap; font-size: 15px; }

.hero { padding: 56px 0 28px; }
.kicker { font-family: var(--mono); font-size: 13px; letter-spacing: .16em; text-transform: uppercase; color: var(--blue); }
h1, h2, h3 { font-family: var(--display); letter-spacing: -.02em; line-height: 1.1; margin: 0; }
h1 { font-size: clamp(34px, 6vw, 56px); margin: 12px 0 14px; }
h2 { font-size: 28px; margin: 40px 0 16px; }
h3 { font-size: 21px; margin-bottom: 6px; }
.lead { font-size: 19px; color: var(--ink-2); max-width: 720px; }
p { margin: 0 0 14px; }
.muted { color: var(--muted); }

.weeks { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 18px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 22px; }
.card .tag { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); display: block; margin-bottom: 8px; }
.card.week { display: flex; flex-direction: column; gap: 10px; }
.card.week .actions { margin-top: auto; display: flex; gap: 10px; flex-wrap: wrap; padding-top: 8px; }
.card.soon { opacity: .55; }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg-2); color: var(--ink); font: 600 15px var(--body); cursor: pointer; }
.btn:hover { text-decoration: none; border-color: var(--blue); }
.btn.primary { background: var(--blue); border-color: var(--blue); color: #04122a; }
.btn.primary:hover { filter: brightness(1.08); }

ul.clean { list-style: none; padding: 0; margin: 0; }
ul.clean li { padding: 10px 0; border-bottom: 1px solid rgba(42,55,104,.6); }
ul.outcomes { padding-left: 1.2em; }
ul.outcomes li { margin-bottom: 8px; color: var(--ink-2); }
ul.outcomes li::marker { color: var(--blue); }
.refs p { font-size: 15px; color: var(--ink-2); padding-left: 1.4em; text-indent: -1.4em; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; }
.file { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.file .ext { font-family: var(--mono); font-size: 12px; color: var(--gold); border: 1px solid var(--gold); border-radius: 6px; padding: 2px 6px; }

footer.site { margin-top: 64px; border-top: 1px solid var(--line); padding: 22px 0 40px; color: var(--muted); font-size: 14px; }

/* Quiz */
.quiz { max-width: 760px; }
.quiz .progress { height: 6px; border-radius: 3px; background: var(--bg-2); overflow: hidden; margin: 18px 0 26px; }
.quiz .progress i { display: block; height: 100%; width: 0; background: var(--blue); transition: width .3s; }
.quiz .qnum { font-family: var(--mono); font-size: 13px; letter-spacing: .14em; color: var(--muted); text-transform: uppercase; }
.quiz .question { font-family: var(--display); font-size: clamp(22px, 3.5vw, 28px); line-height: 1.25; margin: 8px 0 22px; }
.quiz .answers { display: grid; gap: 10px; }
.quiz .answer { text-align: left; width: 100%; padding: 14px 16px; border-radius: 12px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); font: 17px/1.4 var(--body); cursor: pointer; display: grid; grid-template-columns: 34px 1fr; gap: 10px; align-items: center; }
.quiz .answer:hover:not(:disabled) { border-color: var(--blue); }
.quiz .answer .k { font-family: var(--mono); font-size: 14px; color: var(--muted); border: 1px solid var(--line); border-radius: 8px; text-align: center; padding: 3px 0; }
.quiz .answer.right { border-color: var(--mint); background: rgba(79,209,165,.14); }
.quiz .answer.wrong { border-color: var(--coral); background: rgba(255,107,107,.14); }
.quiz .answer:disabled { cursor: default; }
.quiz .feedback { margin-top: 18px; padding: 16px 18px; border-radius: 12px; border: 1px solid var(--line); background: var(--bg-2); display: none; }
.quiz .feedback.show { display: block; }
.quiz .feedback strong.ok { color: var(--mint); } .quiz .feedback strong.no { color: var(--coral); }
.quiz .next { margin-top: 18px; }
.quiz .score { font-family: var(--display); font-size: 64px; font-weight: 700; margin: 10px 0; }
.quiz .review li { margin-bottom: 12px; color: var(--ink-2); }
.quiz .review .no { color: var(--coral); } .quiz .review .ok { color: var(--mint); }