/* ============================================================
   Gefechtsdienst-Lernportal — shared design system
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@500;600;700&family=Source+Sans+3:wght@400;500;600;700&family=JetBrains+Mono:wght@500;600&display=swap');

:root {
  --paper: #eef0f1;
  --surface: #ffffff;
  --surface-2: #e2e6e8;
  --ink: #1c2226;
  --ink-muted: #5c6570;
  --ink-faint: #8b939c;
  --line: #d2d8dc;

  --accent: #8a6a30;       /* brass / insignia bronze — primary interactive */
  --accent-strong: #6e5426;
  --accent-bg: #efe6d3;
  --accent-2: #35566e;     /* steel blue — secondary / info */
  --accent-2-bg: #dfe7ec;

  --good: #3f7a4c;
  --good-bg: #e2eee2;
  --warn: #a3781f;
  --warn-bg: #f3ead0;
  --bad: #a5372a;
  --bad-bg: #f4e1de;

  --shadow: 0 1px 2px rgba(20,24,26,0.06), 0 8px 24px -10px rgba(20,24,26,0.18);
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14171a;
    --surface: #1b2025;
    --surface-2: #262c32;
    --ink: #e8eaec;
    --ink-muted: #a3acb5;
    --ink-faint: #6b747d;
    --line: #313a41;

    --accent: #c9a463;
    --accent-strong: #ddbb82;
    --accent-bg: #362c1a;
    --accent-2: #8fb6d1;
    --accent-2-bg: #1c2c37;

    --good: #7fbb84;
    --good-bg: #1e2e21;
    --warn: #d9a94c;
    --warn-bg: #382d18;
    --bad: #e0776a;
    --bad-bg: #3a221e;

    --shadow: 0 1px 2px rgba(0,0,0,0.35), 0 8px 28px -10px rgba(0,0,0,0.55);
  }
}
:root[data-theme="dark"] {
  --paper: #14171a;
  --surface: #1b2025;
  --surface-2: #262c32;
  --ink: #e8eaec;
  --ink-muted: #a3acb5;
  --ink-faint: #6b747d;
  --line: #313a41;

  --accent: #c9a463;
  --accent-strong: #ddbb82;
  --accent-bg: #362c1a;
  --accent-2: #8fb6d1;
  --accent-2-bg: #1c2c37;

  --good: #7fbb84;
  --good-bg: #1e2e21;
  --warn: #d9a94c;
  --warn-bg: #382d18;
  --bad: #e0776a;
  --bad-bg: #3a221e;

  --shadow: 0 1px 2px rgba(0,0,0,0.35), 0 8px 28px -10px rgba(0,0,0,0.55);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Sans 3", ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}
h1, h2, h3, h4 {
  font-family: "Oswald", "Arial Narrow", ui-sans-serif, sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.015em;
  text-wrap: balance;
  color: var(--ink);
  margin: 0 0 8px;
}
p { margin: 0 0 12px; }
code, .mono { font-family: "JetBrains Mono", ui-monospace, monospace; }
a { color: var(--accent-2); }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 24px 80px; }
.wrap-narrow { max-width: 760px; margin: 0 auto; padding: 0 24px 80px; }

/* ---------------- Top nav ---------------- */
header.site-nav {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}
.nav-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 60px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: "Oswald", sans-serif;
  font-weight: 700;
  font-size: 17px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--ink);
  text-decoration: none;
  padding: 14px 0;
}
.brand .dot { color: var(--accent); }
nav.links {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-left: auto;
}
nav.links a {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-muted);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 6px;
  white-space: nowrap;
}
nav.links a:hover { background: var(--surface-2); color: var(--ink); }
nav.links a.active { background: var(--accent-bg); color: var(--accent-strong); }

/* ---------------- Hero / page header ---------------- */
.page-head {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-strong);
  background: var(--accent-bg);
  padding: 4px 10px;
  border-radius: 3px;
  margin-bottom: 14px;
}
.page-head h1 { font-size: clamp(26px, 4vw, 36px); margin-bottom: 8px; }
.page-head .lede { color: var(--ink-muted); max-width: 62ch; font-size: 15.5px; text-transform: none; }

/* ---------------- Section scaffolding ---------------- */
section.block { margin-top: 44px; }
section.block h2 { font-size: 22px; margin-bottom: 6px; }
section.block .lede { color: var(--ink-muted); max-width: 66ch; margin-bottom: 20px; font-size: 14.5px; }
.tag {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--surface);
  background: var(--ink-faint);
  padding: 3px 8px;
  border-radius: 2px;
  margin-bottom: 10px;
}

/* ---------------- Cards (topic grid on home) ---------------- */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 16px;
  margin-top: 24px;
}
.topic-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  text-decoration: none;
  color: var(--ink);
  box-shadow: var(--shadow);
  position: relative;
  min-height: 150px;
}
.topic-card .icon { font-size: 24px; }
.topic-card h3 { font-size: 16px; margin: 0; }
.topic-card p { font-size: 13px; color: var(--ink-muted); margin: 0; flex-grow: 1; }
.topic-card .progress-row { display: flex; align-items: center; gap: 8px; margin-top: 4px; }
.progress-bar { flex-grow: 1; height: 5px; background: var(--surface-2); border-radius: 3px; overflow: hidden; }
.progress-bar > span { display: block; height: 100%; background: var(--accent); border-radius: 3px; transition: width .3s; }
.progress-pct { font-family: "JetBrains Mono", monospace; font-size: 11px; color: var(--ink-faint); min-width: 30px; text-align: right; }

/* ---------------- Callouts ---------------- */
.callout {
  border-radius: 8px;
  padding: 14px 16px;
  font-size: 14px;
  border-left: 3px solid var(--ink-faint);
  background: var(--surface-2);
  margin: 16px 0;
}
.callout b { display: block; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 4px; }
.callout.info { border-color: var(--accent-2); background: var(--accent-2-bg); }
.callout.info b { color: var(--accent-2); }
.callout.warn { border-color: var(--warn); background: var(--warn-bg); }
.callout.warn b { color: var(--warn); }
.callout.good { border-color: var(--good); background: var(--good-bg); }
.callout.good b { color: var(--good); }
.callout.unclear { border-color: var(--ink-faint); background: var(--surface-2); border-style: dashed; }
.callout.unclear b { color: var(--ink-faint); }

/* ---------------- Generic content cards ---------------- */
.card-grid { display: grid; gap: 14px; margin-top: 20px; }
.card-grid.cols-2 { grid-template-columns: 1fr 1fr; }
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.content-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 18px;
}
.content-card h4 { font-size: 14px; margin-bottom: 4px; }
.content-card p { font-size: 13.5px; color: var(--ink-muted); margin: 0; }

/* ---------------- Tables ---------------- */
.table-wrap { overflow-x: auto; margin-top: 18px; border: 1px solid var(--line); border-radius: 8px; }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; background: var(--surface); }
table.data th, table.data td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.data th { background: var(--surface-2); font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-muted); }
table.data tr:last-child td { border-bottom: none; }

/* ---------------- Mnemonic word banner ---------------- */
.merkwort-banner {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 18px 0 6px;
  box-shadow: var(--shadow);
  flex-wrap: wrap;
}
.merkwort-letters { display: flex; gap: 4px; }
.merkwort-letters span {
  font-family: "Oswald", sans-serif;
  font-weight: 700;
  font-size: 22px;
  color: var(--accent-strong);
  background: var(--accent-bg);
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 6px;
}
.merkwort-name { font-size: 13px; color: var(--ink-muted); }
.merkwort-name b { color: var(--ink); }

/* ---------------- Flashcards ---------------- */
.deck { margin-top: 24px; }
.deck-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 13px;
  color: var(--ink-muted);
  flex-wrap: wrap;
}
.deck-controls .counter { font-family: "JetBrains Mono", monospace; }
.btn {
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 14px;
  cursor: pointer;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-strong); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--accent-2); padding: 8px 4px; }

.flashcard {
  perspective: 1400px;
  height: 220px;
  max-width: 560px;
  margin: 0 auto;
  cursor: pointer;
}
.flashcard-inner {
  position: relative;
  width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform .45s cubic-bezier(.4,.2,.2,1);
}
.flashcard.flipped .flashcard-inner { transform: rotateY(180deg); }
.flashcard-face {
  position: absolute; inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 28px;
  background: var(--surface);
}
.flashcard-face .kicker { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 10px; font-family: "JetBrains Mono", monospace; }
.flashcard-face .term { font-family: "Oswald", sans-serif; font-size: 26px; font-weight: 600; color: var(--ink); }
.flashcard-face.back { transform: rotateY(180deg); background: var(--accent-bg); border-color: var(--accent); }
.flashcard-face.back .term { font-family: "Source Sans 3", sans-serif; font-size: 16px; font-weight: 600; text-transform: none; line-height: 1.5; }
.flashcard-face .hint { position: absolute; bottom: 12px; font-size: 11px; color: var(--ink-faint); }

.deck-progress { display: flex; gap: 4px; margin-top: 14px; flex-wrap: wrap; }
.deck-progress span { width: 8px; height: 8px; border-radius: 50%; background: var(--surface-2); border: 1px solid var(--line); }
.deck-progress span.seen { background: var(--accent); border-color: var(--accent); }
.deck-progress span.current { outline: 2px solid var(--accent-2); outline-offset: 1px; }

/* ---------------- Quiz ---------------- */
.quiz-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  margin-top: 20px;
}
.quiz-q { font-size: 15.5px; font-weight: 600; margin-bottom: 14px; }
.quiz-options { display: flex; flex-direction: column; gap: 8px; }
.quiz-option {
  text-align: left;
  font: inherit;
  font-size: 14px;
  padding: 10px 14px;
  border-radius: 7px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}
.quiz-option:hover { background: var(--surface-2); }
.quiz-option.correct { background: var(--good-bg); border-color: var(--good); color: var(--good); font-weight: 600; }
.quiz-option.wrong { background: var(--bad-bg); border-color: var(--bad); color: var(--bad); font-weight: 600; }
.quiz-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 18px; font-size: 13px; color: var(--ink-muted); }
.quiz-score { font-family: "JetBrains Mono", monospace; }

/* ---------------- Tool boxes (calculators) ---------------- */
.tool-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  margin-top: 20px;
}
.tool-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: flex-end; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: 12px; font-weight: 600; color: var(--ink-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.field input, .field select {
  font: inherit; font-size: 15px;
  padding: 9px 11px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  width: 160px;
}
.tool-result {
  margin-top: 18px;
  padding: 14px 16px;
  background: var(--accent-bg);
  border-radius: 8px;
  font-size: 15px;
  color: var(--accent-strong);
  font-weight: 600;
}
.tool-result .mono { font-size: 20px; }

/* ---------------- Cycle diagram ---------------- */
.cycle-wrap { display: flex; gap: 28px; margin-top: 24px; flex-wrap: wrap; align-items: flex-start; }
.cycle-svg { flex: 0 0 auto; }
.cycle-svg .seg { cursor: pointer; transition: opacity .2s; }
.cycle-svg .seg:hover { opacity: 0.85; }
.cycle-svg text { font-family: "Oswald", sans-serif; font-weight: 600; fill: #fff; font-size: 13px; text-transform: uppercase; }
.cycle-detail {
  flex: 1 1 280px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow);
  min-height: 220px;
}
.cycle-detail h4 { font-size: 16px; margin-bottom: 8px; color: var(--accent-strong); }
.cycle-detail ul { margin: 0; padding-left: 18px; font-size: 14px; }
.cycle-detail li { margin-bottom: 6px; }

/* ---------------- Symbol legend grid ---------------- */
.symbol-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 10px; margin-top: 18px; }
.symbol-tile {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}
.symbol-tile svg { width: 36px; height: 36px; }
.symbol-tile span { font-size: 11.5px; color: var(--ink-muted); line-height: 1.2; }

@media (max-width: 760px) {
  .card-grid.cols-2, .card-grid.cols-3 { grid-template-columns: 1fr; }
  .cycle-wrap { flex-direction: column; }
  .flashcard { height: 260px; }
}