/* AWS AI GameDay study repo — shared styles
   Aesthetic: dark "code-editor console" (Ayu-inspired). */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,600;1,9..144,500&family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@400;500;600&display=swap');

:root {
  --bg:        #1a1f29;
  --bg-grid:   #20252f;
  --panel:     #232a36;
  --panel-2:   #2a3340;
  --ink:       #cdd3de;
  --ink-dim:   #6f7b8f;
  --accent:    #ffcc66;  /* amber */
  --accent-2:  #73d0ff;  /* blue  */
  --green:     #87d96c;
  --red:       #ff7a7a;
  --border:    #313a4a;
  --radius:    14px;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --sans: 'IBM Plex Sans', system-ui, sans-serif;
  --display: 'Fraunces', Georgia, serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(255,204,102,.06), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(115,208,255,.06), transparent 60%),
    linear-gradient(var(--bg-grid) 1px, transparent 1px) 0 0/100% 38px,
    var(--bg);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1040px; margin: 0 auto; padding: 40px 24px 80px; }

/* ---- header ---- */
.masthead { border-bottom: 1px solid var(--border); padding-bottom: 22px; margin-bottom: 34px; }
.kicker {
  font-family: var(--mono); font-size: 12px; letter-spacing: .22em;
  text-transform: uppercase; color: var(--accent);
}
.masthead h1 {
  font-family: var(--display); font-weight: 600; font-size: clamp(30px, 5vw, 52px);
  line-height: 1.04; margin: 6px 0 4px; letter-spacing: -.01em;
}
.masthead h1 em { font-style: italic; color: var(--accent); font-weight: 500; }
.sub { color: var(--ink-dim); font-family: var(--mono); font-size: 13px; }

/* countdown chips */
.chips { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.chip {
  font-family: var(--mono); font-size: 12.5px; color: var(--ink);
  background: var(--panel); border: 1px solid var(--border);
  padding: 9px 13px; border-radius: 9px;
}
.chip b { color: var(--accent-2); }
.chip.hot b { color: var(--accent); }

/* ---- day cards ---- */
.grid { display: grid; gap: 14px; }
.card {
  background: linear-gradient(180deg, var(--panel), var(--panel) 70%, #20262f);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; display: grid; grid-template-columns: auto 1fr auto;
  gap: 18px; align-items: center; text-decoration: none; color: inherit;
  transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease;
  opacity: 0; transform: translateY(10px); animation: rise .5s ease forwards;
}
.card:hover { transform: translateY(-2px); border-color: #475066; box-shadow: 0 10px 30px -16px rgba(0,0,0,.7); }
.daynum {
  font-family: var(--display); font-size: 30px; font-weight: 600; color: var(--accent);
  min-width: 64px; text-align: center; line-height: 1;
}
.daynum small { display: block; font-family: var(--mono); font-size: 10px; letter-spacing: .18em; color: var(--ink-dim); text-transform: uppercase; }
.card h3 { font-size: 17px; font-weight: 600; }
.card .meta { font-family: var(--mono); font-size: 12px; color: var(--ink-dim); margin-top: 3px; }
.phase-tag {
  display: inline-block; font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em;
  text-transform: uppercase; padding: 2px 8px; border-radius: 999px; margin-right: 8px;
  border: 1px solid var(--border);
}
.phase-1 { color: var(--accent-2); border-color: rgba(115,208,255,.4); }
.phase-2 { color: var(--accent); border-color: rgba(255,204,102,.4); }

.links { display: flex; gap: 8px; }
.pill {
  font-family: var(--mono); font-size: 12px; padding: 7px 12px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--panel-2); color: var(--ink);
  text-decoration: none; transition: all .14s ease; white-space: nowrap;
}
.pill:hover { border-color: var(--accent); color: var(--accent); }

/* ---- buttons / generic ---- */
.btn {
  font-family: var(--mono); font-size: 13px; cursor: pointer;
  background: var(--panel-2); color: var(--ink); border: 1px solid var(--border);
  padding: 10px 16px; border-radius: 9px; transition: all .14s ease;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); color: #1a1f29; border-color: var(--accent); font-weight: 600; }
.btn.primary:hover { filter: brightness(1.08); color: #1a1f29; }
.btn:disabled { opacity: .4; cursor: not-allowed; }

.back { font-family: var(--mono); font-size: 12.5px; color: var(--ink-dim); text-decoration: none; }
.back:hover { color: var(--accent); }

.empty { font-family: var(--mono); color: var(--ink-dim); padding: 40px; text-align: center;
  border: 1px dashed var(--border); border-radius: var(--radius); }

@keyframes rise { to { opacity: 1; transform: none; } }

/* ---- flashcards ---- */
.fc-stage { perspective: 1600px; margin: 30px 0 18px; }
.fc {
  position: relative; width: 100%; min-height: 320px; cursor: pointer;
  transform-style: preserve-3d; transition: transform .55s cubic-bezier(.4,.0,.2,1);
}
.fc.flipped { transform: rotateY(180deg); }
.fc-face {
  position: absolute; inset: 0; backface-visibility: hidden;
  border: 1px solid var(--border); border-radius: 18px; padding: 40px;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  text-align: center;
}
.fc-front { background: linear-gradient(180deg, var(--panel), #20262f); }
.fc-back  { background: linear-gradient(180deg, #26303d, #1f2630); transform: rotateY(180deg); }
.fc-label { position: absolute; top: 16px; left: 20px; font-family: var(--mono); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-dim); }
.fc-front .fc-label { color: var(--accent-2); }
.fc-back  .fc-label { color: var(--accent); }
.fc-text { font-size: clamp(18px, 2.6vw, 24px); font-weight: 500; max-width: 60ch; }
.fc-back .fc-text { font-family: var(--sans); font-size: clamp(16px,2.2vw,19px); font-weight: 400; line-height: 1.6; }
.fc-hint { position: absolute; bottom: 16px; font-family: var(--mono); font-size: 11px; color: var(--ink-dim); }

.controls { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.progress { font-family: var(--mono); font-size: 13px; color: var(--ink-dim); }
.progress b { color: var(--accent); }

/* ---- quiz ---- */
.q-card { background: linear-gradient(180deg, var(--panel), #20262f); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; margin: 24px 0; }
.q-num { font-family: var(--mono); font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: var(--accent-2); }
.q-text { font-size: 19px; font-weight: 600; margin: 8px 0 22px; line-height: 1.4; }
.opt {
  display: block; width: 100%; text-align: left; font-family: var(--sans); font-size: 15px;
  color: var(--ink); background: var(--panel-2); border: 1px solid var(--border);
  padding: 14px 16px; border-radius: 10px; margin-bottom: 11px; cursor: pointer;
  transition: all .13s ease;
}
.opt:hover:not(.locked) { border-color: var(--accent-2); }
.opt .key { font-family: var(--mono); color: var(--ink-dim); margin-right: 12px; }
.opt.correct { border-color: var(--green); background: rgba(135,217,108,.12); }
.opt.correct .key { color: var(--green); }
.opt.wrong { border-color: var(--red); background: rgba(255,122,122,.1); }
.opt.wrong .key { color: var(--red); }
.opt.locked { cursor: default; }
.explain { font-family: var(--sans); font-size: 14px; color: var(--ink-dim); border-left: 2px solid var(--accent);
  padding: 10px 14px; margin-top: 14px; background: rgba(255,204,102,.05); border-radius: 0 8px 8px 0; }
.explain b { color: var(--accent); }

.scorebox { text-align: center; padding: 48px 24px; }
.scorebox .big { font-family: var(--display); font-size: 64px; color: var(--accent); line-height: 1; }
.scorebox p { font-family: var(--mono); color: var(--ink-dim); margin: 14px 0 26px; }

footer { margin-top: 56px; border-top: 1px solid var(--border); padding-top: 20px;
  font-family: var(--mono); font-size: 12px; color: var(--ink-dim); display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; }
footer a { color: var(--ink-dim); }
footer a:hover { color: var(--accent); }

/* ---- rendered markdown notes (notes.html) ---- */
.md-body { margin: 28px 0; font-size: 15.5px; line-height: 1.7; }
.md-body h1 { font-family: var(--display); font-weight: 600; font-size: clamp(26px,4vw,38px); margin: 4px 0 14px; line-height: 1.1; }
.md-body h2 { font-size: 22px; font-weight: 600; margin: 34px 0 12px; padding-bottom: 7px; border-bottom: 1px solid var(--border); color: var(--ink); }
.md-body h3 { font-size: 17px; font-weight: 600; margin: 24px 0 8px; color: var(--accent-2); }
.md-body p { margin: 12px 0; }
.md-body strong { color: #e7ecf3; }
.md-body em { color: var(--ink); }
.md-body a { color: var(--accent-2); text-decoration: none; border-bottom: 1px solid rgba(115,208,255,.35); }
.md-body a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.md-body ul, .md-body ol { margin: 12px 0; padding-left: 26px; }
.md-body li { margin: 6px 0; }
.md-body li::marker { color: var(--accent); }
.md-body hr { border: none; border-top: 1px solid var(--border); margin: 28px 0; }
.md-body blockquote {
  margin: 16px 0; padding: 12px 18px; border-left: 3px solid var(--accent);
  background: rgba(255,204,102,.06); border-radius: 0 8px 8px 0; color: var(--ink);
}
.md-body blockquote p { margin: 4px 0; }
.md-body code {
  font-family: var(--mono); font-size: 13px; background: var(--panel-2);
  border: 1px solid var(--border); border-radius: 5px; padding: 1.5px 6px; color: var(--accent);
}
.md-body pre {
  background: #161b23; border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 18px; overflow-x: auto; margin: 16px 0;
}
.md-body pre code { background: none; border: none; padding: 0; color: var(--ink); font-size: 13px; }
.md-body table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 14px; }
.md-body th, .md-body td { border: 1px solid var(--border); padding: 9px 12px; text-align: left; }
.md-body th { background: var(--panel-2); font-family: var(--mono); font-size: 12px; letter-spacing: .04em; }
.md-body img { max-width: 100%; border: 1px solid var(--border); border-radius: 10px; margin: 14px 0; }
.md-body input[type=checkbox] { margin-right: 8px; accent-color: var(--accent); }