/* CFI Chart Room — design system
   Paper: sectional-chart cream. FOI: chart magenta. FIA: airspace blue. */

:root {
  --paper: #f5f0e4;
  --paper-2: #efe8d8;
  --paper-3: #e7ddc8;
  --ink: #22262e;
  --ink-soft: #4b5261;
  --ink-faint: #8a8f9c;
  --magenta: #a83a72;      /* FOI — Class E vignette */
  --magenta-deep: #7e2a55;
  --blue: #33628f;         /* FIA — Class D dashed blue */
  --blue-deep: #24466a;
  --green: #3e6b4f;        /* correct */
  --red: #a13c2f;          /* wrong */
  --amber: #b07c26;
  --line: #d8ccb2;
  --card-shadow: 0 1px 2px rgba(34,38,46,.08), 0 6px 24px -8px rgba(34,38,46,.18);
  --font-display: "Barlow Condensed", sans-serif;
  --font-body: "Source Serif 4", Georgia, serif;
  --font-mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  /* graticule: faint chart grid */
  background-image:
    linear-gradient(rgba(51,98,143,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(51,98,143,.045) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* ---------- header / nav ---------- */
.masthead {
  border-bottom: 3px double var(--ink);
  background: var(--paper);
  position: sticky; top: 0; z-index: 50;
  box-shadow: 0 2px 12px -6px rgba(34,38,46,.25);
}
.masthead-inner {
  max-width: 1040px; margin: 0 auto; padding: 10px 20px;
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
}
.brand {
  font-family: var(--font-display);
  font-weight: 600; font-size: 22px; letter-spacing: .14em;
  text-transform: uppercase; text-decoration: none; color: var(--ink);
  display: flex; align-items: baseline; gap: 8px;
}
.brand .tick { color: var(--magenta); }
.brand small {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .08em;
  color: var(--ink-faint); text-transform: none;
}
.nav { display: flex; gap: 2px; margin-left: auto; flex-wrap: wrap; }
.nav a {
  font-family: var(--font-display); font-weight: 500; font-size: 15px;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-soft); text-decoration: none; padding: 6px 12px;
  border-bottom: 3px solid transparent;
}
.nav a:hover { color: var(--ink); background: var(--paper-2); }
.nav a.active { color: var(--ink); border-bottom-color: var(--magenta); }
.nav a.active.fia { border-bottom-color: var(--blue); }

/* ---------- layout ---------- */
.wrap { max-width: 1040px; margin: 0 auto; padding: 28px 20px 80px; }
.wrap.narrow { max-width: 820px; }

/* ---------- dashboard ---------- */
.hero { margin: 30px 0 8px; }
.hero h1 {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(42px, 7vw, 72px); line-height: .95;
  letter-spacing: .02em; text-transform: uppercase; margin: 0;
}
.hero h1 .foi { color: var(--magenta); }
.hero h1 .fia { color: var(--blue); }
.hero p.lede { font-size: 19px; color: var(--ink-soft); max-width: 640px; margin: 14px 0 0; }

.testgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; margin: 36px 0; }
.testcard {
  background: #fffdf6; border: 1.5px solid var(--ink); border-radius: 4px;
  box-shadow: var(--card-shadow); padding: 22px 24px; position: relative;
  overflow: hidden;
}
.testcard::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 7px;
}
.testcard.foi::before { background: repeating-linear-gradient(180deg, var(--magenta) 0 14px, transparent 14px 20px); }
.testcard.fia::before { background: repeating-linear-gradient(180deg, var(--blue) 0 14px, transparent 14px 20px); }
.testcard h2 {
  font-family: var(--font-display); font-weight: 600; font-size: 30px;
  letter-spacing: .06em; text-transform: uppercase; margin: 0 0 2px;
}
.testcard .code { font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint); letter-spacing: .06em; }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 16px 0; }
.fact { border-top: 2px solid var(--line); padding-top: 6px; }
.fact b { font-family: var(--font-mono); font-size: 20px; display: block; }
.fact span { font-family: var(--font-display); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }

.btn {
  font-family: var(--font-display); font-weight: 600; font-size: 15px;
  letter-spacing: .12em; text-transform: uppercase;
  padding: 9px 18px; border-radius: 3px; cursor: pointer; text-decoration: none;
  border: 1.5px solid var(--ink); background: var(--ink); color: var(--paper);
  transition: transform .08s ease, box-shadow .12s ease;
  display: inline-block;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 4px 10px -4px rgba(34,38,46,.5); }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.foi { background: var(--magenta); border-color: var(--magenta-deep); }
.btn.fia { background: var(--blue); border-color: var(--blue-deep); }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }

.statline { font-family: var(--font-mono); font-size: 13px; color: var(--ink-soft); }

/* ---------- reader (markdown) ---------- */
.reader { display: grid; grid-template-columns: 230px minmax(0,1fr); gap: 36px; align-items: start; }
@media (max-width: 900px) { .reader { grid-template-columns: 1fr; } .toc { position: static !important; max-height: none !important; } }
.toc {
  position: sticky; top: 76px; max-height: calc(100vh - 100px); overflow-y: auto;
  font-family: var(--font-display); font-size: 14px; letter-spacing: .04em;
  border-right: 1px solid var(--line); padding-right: 14px;
}
.toc a { display: block; color: var(--ink-soft); text-decoration: none; padding: 3px 0 3px 8px; border-left: 2px solid transparent; line-height: 1.35; }
.toc a:hover { color: var(--ink); }
.toc a.h3 { padding-left: 22px; font-size: 13px; color: var(--ink-faint); }
.toc a.here { border-left-color: var(--magenta); color: var(--ink); }
.doc h1, .doc h2, .doc h3, .doc h4 {
  font-family: var(--font-display); font-weight: 600; letter-spacing: .03em;
  text-transform: uppercase; line-height: 1.1; scroll-margin-top: 84px;
}
.doc h1 { font-size: 40px; margin: 10px 0 4px; }
.doc h2 { font-size: 28px; margin: 44px 0 10px; padding-top: 14px; border-top: 2px solid var(--ink); }
.doc h2::before { content: "§ "; color: var(--magenta); font-weight: 400; }
.doc.fia h2::before { color: var(--blue); }
.doc h3 { font-size: 21px; margin: 26px 0 6px; color: var(--ink-soft); }
.doc p { margin: 10px 0; }
.doc li { margin: 4px 0; }
.doc strong { background: linear-gradient(transparent 62%, rgba(168,58,114,.22) 62%); }
.doc.fia strong { background: linear-gradient(transparent 62%, rgba(51,98,143,.20) 62%); }
.doc code { font-family: var(--font-mono); font-size: .85em; background: var(--paper-3); padding: 1px 5px; border-radius: 3px; }
.doc table { border-collapse: collapse; margin: 14px 0; width: 100%; font-size: 15px; background: #fffdf6; }
.doc th { font-family: var(--font-display); letter-spacing: .08em; text-transform: uppercase; font-size: 13px; text-align: left; background: var(--ink); color: var(--paper); padding: 7px 10px; }
.doc td { border: 1px solid var(--line); padding: 6px 10px; vertical-align: top; }
.doc tr:nth-child(even) td { background: var(--paper-2); }
.doc blockquote { margin: 14px 0; padding: 10px 16px; border-left: 4px solid var(--amber); background: #fbf6e8; font-size: 15.5px; }
.doc hr { border: none; border-top: 1px dashed var(--line); margin: 30px 0; }
/* no link anywhere renders browser-default blue: inherit ink, highlight band */
a { color: inherit; }
.panel a, .footer-note a, .qfig a { text-decoration: none; background: linear-gradient(transparent 62%, rgba(168,58,114,.22) 62%); }
.panel a:hover, .footer-note a:hover, .qfig a:hover { background: linear-gradient(transparent 55%, rgba(168,58,114,.38) 55%); }
.doc a { color: inherit; text-decoration: none; background: linear-gradient(transparent 62%, rgba(168,58,114,.22) 62%); }
.doc a:hover { background: linear-gradient(transparent 55%, rgba(168,58,114,.38) 55%); }
.doc.fia a { background: linear-gradient(transparent 62%, rgba(51,98,143,.20) 62%); }
.doc.fia a:hover { background: linear-gradient(transparent 55%, rgba(51,98,143,.36) 55%); }
.doc strong a, .doc a strong { background: none; }
.doc strong a:hover { background: linear-gradient(transparent 55%, rgba(168,58,114,.30) 55%); }
.ref a { color: inherit; text-decoration: none; background: linear-gradient(transparent 62%, rgba(168,58,114,.22) 62%); }
.ref a:hover { background: linear-gradient(transparent 55%, rgba(168,58,114,.38) 55%); }
.doc.fia strong a:hover { background: linear-gradient(transparent 55%, rgba(51,98,143,.28) 55%); }

/* ---------- quiz ---------- */
.panel {
  background: #fffdf6; border: 1.5px solid var(--ink); border-radius: 4px;
  box-shadow: var(--card-shadow); padding: 24px 26px; margin: 18px 0;
}
.panel h2 { font-family: var(--font-display); font-weight: 600; font-size: 26px; letter-spacing: .06em; text-transform: uppercase; margin: 0 0 12px; }
.controls { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.controls label { font-family: var(--font-display); font-size: 14px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); }
select, input[type="number"] {
  font-family: var(--font-mono); font-size: 15px; padding: 7px 10px;
  border: 1.5px solid var(--ink); border-radius: 3px; background: var(--paper); color: var(--ink);
}
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  font-family: var(--font-display); font-size: 13px; letter-spacing: .08em; text-transform: uppercase;
  padding: 5px 12px; border: 1.5px solid var(--ink-soft); border-radius: 99px;
  background: transparent; color: var(--ink-soft); cursor: pointer;
}
.chip.on { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.qmeta { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; font-family: var(--font-mono); font-size: 13px; color: var(--ink-soft); flex-wrap: wrap; }
.qmeta .timer { font-size: 17px; color: var(--ink); }
.qmeta .timer.low { color: var(--red); animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: .35; } }
.progressbar { height: 5px; background: var(--paper-3); border-radius: 99px; overflow: hidden; margin: 10px 0 18px; }
.progressbar i { display: block; height: 100%; background: var(--magenta); transition: width .25s ease; }
.progressbar.fia i { background: var(--blue); }

.qtext { font-size: 19px; margin: 6px 0 6px; }
.qfig { font-family: var(--font-mono); font-size: 13px; color: var(--amber); margin: 0 0 10px; }
.choice {
  display: flex; gap: 12px; align-items: flex-start; width: 100%; text-align: left;
  font-family: var(--font-body); font-size: 16.5px; line-height: 1.5;
  background: var(--paper); border: 1.5px solid var(--line); border-radius: 4px;
  padding: 12px 14px; margin: 8px 0; cursor: pointer; color: var(--ink);
  transition: border-color .1s ease, background .1s ease;
}
.choice:hover:not(:disabled) { border-color: var(--ink); background: #fffdf6; }
.choice .key {
  font-family: var(--font-mono); font-weight: 600; font-size: 14px;
  border: 1.5px solid var(--ink-soft); border-radius: 3px; padding: 1px 7px; flex: none; margin-top: 2px;
}
.choice.picked { border-color: var(--ink); background: var(--paper-2); box-shadow: inset 0 0 0 1px var(--ink); }
.choice.right { border-color: var(--green); background: #eef3ea; box-shadow: inset 0 0 0 1.5px var(--green); }
.choice.wrong { border-color: var(--red); background: #f6ebe7; box-shadow: inset 0 0 0 1.5px var(--red); }
.choice:disabled { cursor: default; }
.explain {
  border-left: 4px solid var(--green); background: #eef3ea; padding: 12px 16px;
  margin: 12px 0; font-size: 15.5px; border-radius: 0 4px 4px 0;
}
.explain.miss { border-left-color: var(--red); background: #f6ebe7; }
.explain .ref { font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-soft); display: block; margin-top: 6px; }

.scoreboard { text-align: center; padding: 30px 10px; }
.scoreboard .big {
  font-family: var(--font-display); font-weight: 600; font-size: 84px; line-height: 1;
}
.scoreboard .big.pass { color: var(--green); }
.scoreboard .big.fail { color: var(--red); }
.scoreboard .verdict { font-family: var(--font-display); font-size: 22px; letter-spacing: .18em; text-transform: uppercase; }
.missgrid { text-align: left; margin-top: 22px; }

/* ---------- flashcards ---------- */
.stage { perspective: 1400px; margin: 22px auto; max-width: 640px; }
.fcard {
  position: relative; width: 100%; min-height: 320px; cursor: pointer;
  transform-style: preserve-3d; transition: transform .45s cubic-bezier(.2,.7,.3,1);
}
.fcard.flip { transform: rotateY(180deg); }
.face {
  position: absolute; inset: 0; backface-visibility: hidden;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  padding: 34px 38px; text-align: center;
  background: #fffdf6; border: 1.5px solid var(--ink); border-radius: 6px;
  box-shadow: var(--card-shadow);
}
.face.back { transform: rotateY(180deg); background: var(--paper-2); }
.face .deck-tag { position: absolute; top: 12px; left: 14px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--ink-faint); text-transform: uppercase; }
.face .txt { font-size: 20px; line-height: 1.5; white-space: pre-wrap; }
.face.back .txt { font-size: 18px; }
.fnav { display: flex; gap: 10px; justify-content: center; margin-top: 18px; flex-wrap: wrap; }
.btn.again { background: var(--red); border-color: var(--red); }
.btn.good { background: var(--green); border-color: var(--green); }

/* ---------- print (cheat sheets) ---------- */
@media print {
  .masthead, .no-print, .toc { display: none !important; }
  body { background: #fff; font-size: 11.5px; }
  .wrap { max-width: none; padding: 0; }
  .doc h2 { break-after: avoid; }
  .doc table { font-size: 10.5px; }
}

/* ---------- cross-device sync bar (additive — same tokens as .controls) ---------- */
input[type="email"] {
  font-family: var(--font-mono); font-size: 15px; padding: 7px 10px;
  border: 1.5px solid var(--ink); border-radius: 3px; background: var(--paper); color: var(--ink);
  min-width: 220px;
}
.syncbar { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--line); }
.sync-label {
  font-family: var(--font-display); font-size: 14px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-soft); display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.btn.small { font-size: 13px; padding: 7px 14px; }
#sync-status[data-state="err"] { color: var(--red); }
#sync-status[data-state="ok"] { color: var(--green); }

/* ---------- weak areas summary ---------- */
.weakgrid { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.weakgrid .wk {
  font-family: var(--font-mono); font-size: 12.5px;
  border: 1px solid var(--line); background: var(--paper-2); border-radius: 3px; padding: 4px 9px;
}
.weakgrid .wk b { font-family: var(--font-mono); color: var(--red); }

.loading { font-family: var(--font-mono); color: var(--ink-faint); padding: 40px 0; text-align: center; }
.footer-note { margin-top: 60px; border-top: 1px dashed var(--line); padding-top: 14px; font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint); }
.footer-note a { color: var(--ink-soft); }