/* =========================================================
   CodeLingo – Stylesheet
   ========================================================= */

:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #f7f7f7;
  --card: #ffffff;
  --border: #e5e5e5;
  --border-strong: #cfcfcf;
  --text: #3c3c3c;
  --muted: #777777;
  --faint: #afafaf;

  --green: #58cc02;
  --green-dark: #58a700;
  --green-soft: #d7ffb8;
  --green-ink: #58a700;
  --blue: #1cb0f6;
  --blue-dark: #1899d6;
  --blue-soft: #ddf4ff;
  --blue-line: #84d8ff;
  --red: #ff4b4b;
  --red-dark: #ea2b2b;
  --red-soft: #ffdfe0;
  --red-ink: #ea2b2b;
  --gold: #ffc800;
  --gold-dark: #e5a800;
  --orange: #ff9600;
  --purple: #ce82ff;

  --locked: #e5e5e5;
  --locked-dark: #c4c4c4;
  --code-bg: #0d1117;
  --code-text: #e6edf3;

  --radius: 16px;
  --font: "Nunito", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "Cascadia Code", Consolas, monospace;
  --ease: cubic-bezier(.2, .8, .2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #131f24;
    --surface: #1a2a31;
    --card: #131f24;
    --border: #37464f;
    --border-strong: #52656d;
    --text: #f1f7fb;
    --muted: #a3b3bb;
    --faint: #6b7f88;
    --green-soft: #1d3a14;
    --green-ink: #79d634;
    --blue-soft: #10334a;
    --blue-line: #1899d6;
    --red-soft: #3d1c20;
    --red-ink: #ff7878;
    --locked: #37464f;
    --locked-dark: #2a363c;
  }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
button, input { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; }
ul, ol { list-style: none; }
img, svg { display: block; max-width: 100%; }
strong { font-weight: 800; }

:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; border-radius: 8px; }

.mono { font-family: var(--mono); }

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  --btn-bg: var(--card);
  --btn-edge: var(--border);
  --btn-text: var(--blue);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 22px;
  border-radius: 16px;
  border: 2px solid var(--btn-edge);
  border-bottom-width: 4px;
  background: var(--btn-bg);
  color: var(--btn-text);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .8px;
  text-transform: uppercase;
  white-space: nowrap;
  transition: filter .15s, transform .08s, border-bottom-width .08s;
  user-select: none;
}
.btn:hover { filter: brightness(1.06); }
.btn:active { transform: translateY(2px); border-bottom-width: 2px; }

.btn-primary { --btn-bg: var(--green); --btn-edge: var(--green-dark); --btn-text: #fff; }
.btn-blue    { --btn-bg: var(--blue); --btn-edge: var(--blue-dark); --btn-text: #fff; }
.btn-danger  { --btn-bg: var(--red); --btn-edge: var(--red-dark); --btn-text: #fff; }
.btn-secondary { --btn-bg: var(--card); --btn-edge: var(--border); --btn-text: var(--blue); }
.btn-secondary:hover { background: var(--surface); filter: none; }
.btn-ghost-danger { --btn-bg: transparent; --btn-edge: transparent; --btn-text: var(--red); }

.btn[disabled], .btn:disabled {
  --btn-bg: var(--border);
  --btn-edge: var(--border);
  --btn-text: var(--faint);
  cursor: not-allowed;
  filter: none;
  transform: none;
  border-bottom-width: 4px;
}

.btn-sm { min-height: 40px; padding: 8px 16px; font-size: 13px; border-radius: 12px; }
.btn-lg { min-height: 54px; padding: 14px 28px; font-size: 16px; }
.btn-block { width: 100%; }

.icon-btn {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  font-size: 24px; color: var(--faint);
  border-radius: 10px;
  transition: color .15s, background .15s;
}
.icon-btn:hover { color: var(--muted); background: var(--surface); }

/* =========================================================
   Allgemeine Bausteine
   ========================================================= */
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--green); }
.logo-mark {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: var(--green);
  color: #fff;
  font-size: 18px;
  box-shadow: 0 4px 0 var(--green-dark);
}
.logo-text { font-size: 28px; font-weight: 900; letter-spacing: -.5px; }

.avatar {
  --size: 40px;
  width: var(--size); height: var(--size);
  flex-shrink: 0;
  display: inline-grid; place-items: center;
  border-radius: 50%;
  background: hsl(var(--hue, 200) 62% 52%);
  color: #fff;
  font-weight: 900;
  font-size: calc(var(--size) * .45);
  box-shadow: inset 0 -4px 0 rgba(0, 0, 0, .15);
}

.course-chip {
  width: 34px; height: 34px;
  display: inline-grid; place-items: center;
  flex-shrink: 0;
  border-radius: 10px;
  background: var(--course, var(--blue));
  color: var(--ink, #fff);
  font-size: 18px;
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, .18);
}
.course-chip-lg { width: 56px; height: 56px; border-radius: 16px; font-size: 30px; box-shadow: inset 0 -5px 0 rgba(0, 0, 0, .18); }

.pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--blue-dark);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .6px;
}

.card {
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--card);
}
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.card-head h3 { font-size: 20px; font-weight: 800; }
.card-head a { color: var(--blue); font-weight: 800; font-size: 14px; text-transform: uppercase; letter-spacing: .5px; }
.card-note { color: var(--muted); font-size: 15px; margin-top: 10px; }

.progress {
  position: relative;
  height: 16px;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
}
.progress > span {
  position: relative;
  display: block;
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: var(--green);
  transition: width .7s var(--ease);
}
.progress > span::after {
  content: "";
  position: absolute;
  left: 8px; right: 8px; top: 4px;
  height: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .3);
}
.progress-gold > span { background: var(--gold); }
.progress-green > span { background: var(--green); }
.progress > em {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-style: normal;
  font-size: 11px;
  font-weight: 900;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, .55);
}

.flash {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 16px;
  margin-bottom: 20px;
  border-radius: 14px;
  border: 2px solid;
  font-weight: 700;
}
.flash i { margin-top: 3px; }
.flash ul { display: grid; gap: 4px; }
.flash-ok  { background: var(--green-soft); border-color: var(--green); color: var(--green-ink); }
.flash-err { background: var(--red-soft); border-color: var(--red); color: var(--red-ink); }

.empty-state { text-align: center; max-width: 440px; margin: 40px auto; }
.empty-state h1 { font-size: 26px; font-weight: 900; margin: 18px 0 8px; }
.empty-state p { color: var(--muted); margin: 12px 0 22px; }
.empty-state.small { margin: 24px auto; }
.empty-icon {
  width: 88px; height: 88px;
  margin: 0 auto;
  display: grid; place-items: center;
  border-radius: 50%;
  font-size: 40px;
  background: var(--surface);
}
.empty-icon.is-red { color: var(--red); background: var(--red-soft); }
.empty-icon.is-gold { color: var(--gold-dark); background: rgba(255, 200, 0, .16); }
.empty-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.page-title { font-size: 30px; font-weight: 900; letter-spacing: -.3px; }
.page-sub { color: var(--muted); margin: 6px 0 26px; font-size: 17px; }
.section-title { font-size: 22px; font-weight: 900; margin: 36px 0 14px; }

/* =========================================================
   Landing
   ========================================================= */
.landing-wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

.landing-header {
  position: sticky; top: 0; z-index: 20;
  background: var(--bg);
  border-bottom: 2px solid var(--border);
}
.landing-header .landing-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.hero { padding: 64px 0 72px; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.hero-art { position: relative; max-width: 380px; margin: 0 auto; width: 100%; }
.mascot { width: 100%; }
.float-chip {
  position: absolute;
  width: 56px; height: 56px;
  display: grid; place-items: center;
  border-radius: 16px;
  background: var(--card);
  border: 2px solid var(--border);
  border-bottom-width: 4px;
  font-size: 28px;
}
.chip-a { top: 6%; left: -4%; color: #3776ab; }
.chip-b { top: 16%; right: -6%; color: #e0b400; }
.chip-c { bottom: 14%; left: 2%; color: #00758f; }

.hero-copy h1 { font-size: clamp(30px, 4vw, 44px); font-weight: 900; line-height: 1.15; letter-spacing: -.5px; }
.hero-copy p { font-size: 19px; color: var(--muted); margin: 18px 0 30px; max-width: 480px; }
.hero-actions { display: grid; gap: 12px; max-width: 360px; }

.course-strip { border-top: 2px solid var(--border); border-bottom: 2px solid var(--border); }
.course-strip-inner { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 36px; padding-top: 22px; padding-bottom: 22px; }
.strip-item { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 17px; color: var(--muted); text-transform: uppercase; letter-spacing: .6px; }
.strip-item i { font-size: 26px; }

.landing-features { padding: 72px 0; }
.landing-features h2, .landing-cta h2 { font-size: 32px; font-weight: 900; text-align: center; letter-spacing: -.3px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 36px; }
.feature {
  border: 2px solid var(--border);
  border-bottom-width: 4px;
  border-radius: 20px;
  padding: 24px;
  transition: transform .2s var(--ease);
}
.feature:hover { transform: translateY(-3px); }
.feature-icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: 14px;
  font-size: 24px;
  color: var(--c);
  background: color-mix(in srgb, var(--c) 16%, transparent);
}
.feature h3 { font-size: 19px; font-weight: 900; margin: 16px 0 6px; }
.feature p { color: var(--muted); font-size: 15px; }
.landing-note { text-align: center; color: var(--muted); font-weight: 700; margin-top: 30px; }

.landing-cta { padding: 72px 0 96px; text-align: center; border-top: 2px solid var(--border); }
.landing-cta .btn { margin-top: 26px; }

/* =========================================================
   Auth
   ========================================================= */
.auth { min-height: 100vh; display: flex; flex-direction: column; padding: 20px 24px 48px; }
.auth-top { display: flex; align-items: center; justify-content: space-between; max-width: 1080px; width: 100%; margin: 0 auto; }
.auth-card { width: 100%; max-width: 400px; margin: 56px auto 0; }
.auth-card h1 { font-size: 28px; font-weight: 900; text-align: center; }
.auth-sub { text-align: center; color: var(--muted); margin: 6px 0 26px; }
.auth-foot { text-align: center; color: var(--muted); margin-top: 22px; font-weight: 700; }
.auth-foot a { color: var(--blue); }

.field { display: block; margin-bottom: 14px; }
.field > span { display: block; font-weight: 800; font-size: 14px; margin-bottom: 6px; color: var(--muted); }
.field small { font-weight: 700; color: var(--faint); }
.input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  font-size: 16px;
  transition: border-color .15s;
}
.input:focus { outline: none; border-color: var(--blue); }
.auth-card form .btn { margin-top: 8px; }

/* =========================================================
   App-Shell
   ========================================================= */
.app { display: grid; grid-template-columns: 256px minmax(0, 1fr); min-height: 100vh; }

.sidebar {
  position: sticky; top: 0;
  height: 100vh;
  display: flex; flex-direction: column; gap: 6px;
  padding: 24px 16px;
  border-right: 2px solid var(--border);
  background: var(--bg);
}
.sidebar .logo { padding: 0 12px 26px; }

.nav-link {
  display: flex; align-items: center; gap: 18px;
  width: 100%;
  padding: 11px 16px;
  border: 2px solid transparent;
  border-radius: 14px;
  color: var(--muted);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .8px;
  text-transform: uppercase;
  text-align: left;
  transition: background .15s, color .15s;
}
.nav-link i { width: 30px; font-size: 24px; text-align: center; }
.nav-link:hover { background: var(--surface); color: var(--text); }
.nav-link.is-active { color: var(--blue); background: var(--blue-soft); border-color: var(--blue-line); }
.nav-link.is-active i { color: var(--blue); }
.nav-logout { margin-top: auto; }

.page { min-width: 0; }
.content { max-width: 1080px; margin: 0 auto; padding: 28px 32px 64px; }

/* Obere Leiste: Bereiche (Kurse, Tests, Server bauen) und die Werte des Kontos */
.page-top {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 10px 32px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 2px solid var(--border);
}
.topnav { display: flex; gap: 8px; flex: 1 1 auto; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.topnav::-webkit-scrollbar { display: none; }
.topnav-link {
  flex: none; display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px; border-radius: 14px; border: 2px solid transparent;
  font-weight: 800; color: var(--muted); text-decoration: none; white-space: nowrap;
}
.topnav-link i { font-size: 17px; }
.topnav-link:hover { background: var(--surface); color: var(--text); }
.topnav-link.is-active { color: var(--blue); background: var(--blue-soft); border-color: var(--blue-line); }
.page-top-stats { flex: none; }

.mobile-stats {
  display: none;
  position: sticky; top: 0; z-index: 30;
  padding: 10px 16px;
  background: var(--bg);
  border-bottom: 2px solid var(--border);
}

.stats { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.stat {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 6px 10px;
  border-radius: 12px;
  font-weight: 800;
  font-size: 17px;
  color: var(--faint);
  transition: background .15s;
}
.stat i { font-size: 21px; }
a.stat:hover { background: var(--surface); }
.stat-streak.is-on { color: var(--orange); }
.stat-credits { color: var(--blue); }
.stat-hearts { color: var(--red); }

.with-aside { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 48px; align-items: start; }
.aside { position: sticky; top: 24px; display: grid; gap: 18px; }
.aside-stats { padding-bottom: 4px; }

.goal { display: flex; align-items: center; gap: 14px; }
.goal-icon {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  flex-shrink: 0;
  border-radius: 14px;
  background: rgba(255, 200, 0, .18);
  color: var(--gold-dark);
  font-size: 22px;
}
.goal-body { flex: 1; min-width: 0; }
.goal-body p { font-weight: 700; margin-bottom: 8px; }
.goal .progress { height: 20px; }

.heart-row { display: flex; gap: 8px; font-size: 26px; color: var(--locked); }
.heart-row .is-full { color: var(--red); }

.card-boost { display: flex; align-items: center; gap: 14px; border-color: var(--gold); background: rgba(255, 200, 0, .08); }
.card-boost h3 { font-size: 17px; font-weight: 900; }
.card-boost .card-note { margin-top: 2px; }
.boost-icon {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--gold);
  color: #fff;
  font-size: 20px;
}

.rank-teaser { display: flex; align-items: center; gap: 14px; }
.rank-teaser p { color: var(--muted); font-weight: 700; }
.rank-teaser strong { color: var(--text); }
.rank-icon { font-size: 34px; color: var(--gold); }

/* =========================================================
   Lernpfad
   ========================================================= */
.path-col { --course: var(--green); --ink: #fff; }

.course-head { display: flex; align-items: center; gap: 16px; margin-bottom: 26px; }
.course-head h1 { font-size: 26px; font-weight: 900; line-height: 1.2; }
.course-head p { color: var(--muted); font-weight: 700; }
.course-head .btn { margin-left: auto; }

.unit + .unit { margin-top: 20px; }

.unit-banner {
  position: relative;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 22px;
  border-radius: var(--radius);
  background: var(--course);
  color: var(--ink);
  box-shadow: 0 5px 0 color-mix(in srgb, var(--course) 70%, #000);
  overflow: hidden;
}
.unit-kicker { font-size: 14px; font-weight: 800; text-transform: uppercase; letter-spacing: 1px; opacity: .85; }
.unit-banner h2 { font-size: 24px; font-weight: 900; line-height: 1.2; }
.unit-banner p:last-child { opacity: .9; font-weight: 700; }
.unit-icon { font-size: 64px; opacity: .22; flex-shrink: 0; }

.path { display: flex; flex-direction: column; align-items: center; gap: 30px; padding: 48px 0 40px; }

.node-wrap {
  position: relative;
  display: flex; flex-direction: column; align-items: center;
  transform: translateX(var(--x, 0));
}

.node {
  --n-bg: var(--green);
  --n-edge: var(--green-dark);
  position: relative;
  width: 76px; height: 70px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--n-bg);
  color: #fff;
  font-size: 30px;
  box-shadow: 0 8px 0 var(--n-edge);
  transition: transform .1s, box-shadow .1s, filter .15s;
}
a.node:hover { filter: brightness(1.07); }
a.node:active { transform: translateY(6px); box-shadow: 0 2px 0 var(--n-edge); }
.node.is-done { --n-bg: var(--gold); --n-edge: var(--gold-dark); }
.node.is-current { --n-bg: var(--course); --n-edge: color-mix(in srgb, var(--course) 70%, #000); color: var(--ink); }
.node.is-current::before {
  content: "";
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 6px solid color-mix(in srgb, var(--course) 30%, transparent);
}
.node.is-review.is-current { --n-bg: var(--purple); --n-edge: #a568cc; color: #fff; }
.node.is-review.is-current::before { border-color: color-mix(in srgb, var(--purple) 30%, transparent); }
.node.is-locked { --n-bg: var(--locked); --n-edge: var(--locked-dark); color: var(--faint); cursor: not-allowed; font-size: 24px; }

.node-wrap:has(.start-bubble) { margin-top: 44px; }
.start-bubble {
  position: absolute;
  bottom: calc(100% + 14px);
  z-index: 2;
  padding: 8px 14px;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  color: var(--course);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: .8px;
  text-transform: uppercase;
  white-space: nowrap;
}
.start-bubble::after {
  content: "";
  position: absolute;
  left: 50%; top: 100%;
  width: 12px; height: 12px;
  background: var(--card);
  border-right: 2px solid var(--border);
  border-bottom: 2px solid var(--border);
  transform: translate(-50%, -5px) rotate(45deg);
}

.node-label {
  margin-top: 16px;
  max-width: 170px;
  text-align: center;
  font-weight: 800;
  font-size: 15px;
  line-height: 1.25;
}
.node-label small { display: block; color: var(--faint); font-size: 12px; font-weight: 700; margin-top: 2px; }

.course-end { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 20px 0 10px; text-align: center; color: var(--muted); font-weight: 700; }
.trophy {
  width: 84px; height: 84px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--locked);
  color: var(--faint);
  font-size: 38px;
  box-shadow: 0 7px 0 var(--locked-dark);
}
.course-end.is-done .trophy { background: var(--gold); color: #fff; box-shadow: 0 7px 0 var(--gold-dark); }

/* =========================================================
   Kurse
   ========================================================= */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 18px; }
.course-card {
  --course: var(--blue);
  display: flex; flex-direction: column;
  padding: 20px;
  border: 2px solid var(--border);
  border-bottom-width: 4px;
  border-radius: 20px;
  background: var(--card);
  transition: border-color .15s, transform .2s var(--ease);
}
.course-card:hover { transform: translateY(-2px); }
.course-card.is-active { border-color: var(--blue-line); background: var(--blue-soft); }
.course-card-top { display: flex; align-items: flex-start; justify-content: space-between; }
.course-card h2 { font-size: 21px; font-weight: 900; margin: 14px 0 4px; }
.course-card > p { color: var(--muted); font-size: 15px; flex: 1; }
.course-card .progress { height: 12px; margin-top: 16px; }
.course-meta { font-size: 13px; font-weight: 800; color: var(--faint); margin: 8px 0 16px; }

/* =========================================================
   Shop
   ========================================================= */
.credits-inline { color: var(--blue); white-space: nowrap; }

.shop-list { display: grid; }
.shop-item {
  display: flex; align-items: center; gap: 18px;
  padding: 20px 0;
  border-bottom: 2px solid var(--border);
}
.shop-item:first-child { border-top: 2px solid var(--border); }
.shop-icon {
  width: 64px; height: 64px;
  flex-shrink: 0;
  display: grid; place-items: center;
  border-radius: 18px;
  font-size: 30px;
  color: var(--c);
  background: color-mix(in srgb, var(--c) 15%, transparent);
}
.shop-body { flex: 1; min-width: 0; }
.shop-body h2 { font-size: 19px; font-weight: 900; }
.shop-body p { color: var(--muted); font-size: 15px; }
.shop-status { font-weight: 800; color: var(--faint) !important; font-size: 13px !important; margin-top: 4px; text-transform: uppercase; letter-spacing: .5px; }
.shop-buy { min-width: 116px; }
.shop-buy i { color: var(--blue); }

.earn-card { margin-top: 28px; }
.earn-card h2 { font-size: 19px; font-weight: 900; margin-bottom: 12px; }
.earn-card ul { display: grid; gap: 10px; }
.earn-card li { display: flex; align-items: center; gap: 12px; color: var(--muted); font-weight: 700; }
.earn-card li i { color: var(--green); width: 20px; text-align: center; }
.earn-card strong { color: var(--blue); }

/* =========================================================
   Rangliste
   ========================================================= */
.lb-head { display: flex; align-items: center; gap: 18px; }
.lb-head .page-sub { margin-bottom: 20px; }
.lb-trophy {
  width: 64px; height: 64px;
  flex-shrink: 0;
  display: grid; place-items: center;
  border-radius: 18px;
  background: var(--gold);
  color: #fff;
  font-size: 30px;
  box-shadow: 0 5px 0 var(--gold-dark);
  margin-bottom: 20px;
}

.segmented {
  display: inline-flex;
  padding: 4px;
  margin-bottom: 20px;
  border: 2px solid var(--border);
  border-radius: 14px;
}
.segmented a {
  padding: 8px 18px;
  border-radius: 10px;
  font-weight: 800;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--muted);
}
.segmented a.is-active { background: var(--blue-soft); color: var(--blue); }

.lb-list { display: grid; gap: 4px; }
.lb-row {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 14px;
  border-radius: 14px;
}
.lb-row:hover { background: var(--surface); }
.lb-row.is-me { background: var(--blue-soft); }
.lb-rank { width: 30px; text-align: center; font-weight: 900; color: var(--muted); font-size: 17px; flex-shrink: 0; }
.lb-rank i { font-size: 24px; }
.lb-rank.rank-1 { color: #ffc800; }
.lb-rank.rank-2 { color: #a8b8c4; }
.lb-rank.rank-3 { color: #d98a4b; }
.lb-name { flex: 1; min-width: 0; font-weight: 800; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lb-name small { color: var(--blue); font-weight: 800; }
.lb-score { font-weight: 800; color: var(--muted); white-space: nowrap; }
.lb-gap { text-align: center; color: var(--faint); font-weight: 900; letter-spacing: 4px; }

/* =========================================================
   Profil
   ========================================================= */
.profile { max-width: 760px; }
.profile-head { display: flex; align-items: center; gap: 22px; padding-bottom: 26px; border-bottom: 2px solid var(--border); }
.profile-head h1 { font-size: 30px; font-weight: 900; }
.profile-head p { color: var(--muted); font-weight: 700; }

.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.stat-tile {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: 16px;
}
.stat-tile i { font-size: 26px; width: 30px; text-align: center; }
.stat-tile strong { display: block; font-size: 22px; line-height: 1.1; }
.stat-tile span { color: var(--muted); font-size: 14px; font-weight: 700; }

.goal-form { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; align-items: stretch; }
.goal-form .btn { grid-column: 1 / -1; justify-self: start; }
.goal-option { position: relative; cursor: pointer; }
.goal-option input { position: absolute; opacity: 0; pointer-events: none; }
.goal-option span {
  display: flex; flex-direction: column; gap: 2px;
  height: 100%;
  padding: 14px;
  border: 2px solid var(--border);
  border-bottom-width: 4px;
  border-radius: 14px;
  transition: border-color .15s, background .15s;
}
.goal-option em { font-style: normal; color: var(--muted); font-size: 14px; font-weight: 700; }
.goal-option input:checked + span { border-color: var(--blue-line); background: var(--blue-soft); color: var(--blue-dark); }
.goal-option input:focus-visible + span { outline: 3px solid var(--blue); outline-offset: 2px; }

.course-progress-list { display: grid; gap: 14px; }
.cp-row { display: flex; align-items: center; gap: 14px; }
.cp-body { flex: 1; min-width: 0; }
.cp-top { display: flex; justify-content: space-between; font-weight: 800; margin-bottom: 6px; }
.cp-top span { color: var(--muted); }
.cp-row .progress { height: 12px; }

.ach-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.ach {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 16px;
  border: 2px solid var(--border);
  border-radius: 16px;
  opacity: .6;
}
.ach.is-unlocked { opacity: 1; }
.ach strong { display: block; font-size: 16px; }
.ach p { color: var(--muted); font-size: 14px; }
.ach small { color: var(--faint); font-weight: 800; font-size: 12px; }
.ach-badge {
  width: 52px; height: 52px;
  flex-shrink: 0;
  display: grid; place-items: center;
  border-radius: 14px;
  background: var(--locked);
  color: var(--faint);
  font-size: 22px;
  box-shadow: inset 0 -4px 0 rgba(0, 0, 0, .12);
}
.ach.is-unlocked .ach-badge, .result-ach .ach-badge { background: var(--c); color: #fff; }

.profile-logout { margin-top: 40px; }

/* =========================================================
   Lektion
   ========================================================= */
.lesson-body { display: flex; flex-direction: column; min-height: 100vh; min-height: 100dvh; }

.lesson-top {
  display: flex; align-items: center; gap: 16px;
  width: 100%; max-width: 1040px;
  margin: 0 auto;
  padding: 24px 16px 8px;
}
.lesson-progress { flex: 1; }
.lesson-hearts { display: inline-flex; align-items: center; gap: 8px; color: var(--red); font-weight: 900; font-size: 18px; }
.lesson-hearts i { font-size: 24px; }
.lesson-hearts.is-empty { color: var(--faint); }
.lesson-hearts.shake { animation: shake .45s; }

.stage { flex: 1; width: 100%; max-width: 640px; margin: 0 auto; padding: 28px 16px 40px; overflow-x: clip; }

.exercise { animation: slide-in .35s var(--ease); }
.exercise.is-locked { pointer-events: none; }

.ex-kind {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  color: var(--purple);
  font-weight: 900;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: .8px;
}
.retry-badge { color: var(--orange); }
.ex-title { font-size: 26px; font-weight: 900; line-height: 1.25; margin: 8px 0 24px; }

.code-block {
  margin: 0 0 24px;
  padding: 16px 18px;
  border-radius: 14px;
  background: var(--code-bg);
  color: var(--code-text);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.7;
  white-space: pre;
  overflow-x: auto;
  box-shadow: 0 4px 0 rgba(0, 0, 0, .25);
}
.code-block code, .code-block code.hljs {
  display: block;
  padding: 0;
  background: transparent;
  color: inherit;
  font-family: inherit;
  white-space: inherit;
  overflow: visible;
}

/* Multiple Choice */
.choices { display: grid; gap: 12px; }
.choice {
  display: flex; align-items: center; gap: 14px;
  width: 100%;
  padding: 13px 16px;
  text-align: left;
  border: 2px solid var(--border);
  border-bottom-width: 4px;
  border-radius: 14px;
  background: var(--card);
  font-size: 17px;
  font-weight: 700;
  transition: background .12s, border-color .12s, transform .08s;
}
.choice:hover { background: var(--surface); }
.choice:active { transform: translateY(2px); border-bottom-width: 2px; }
.choice .key {
  width: 30px; height: 30px;
  flex-shrink: 0;
  display: grid; place-items: center;
  border: 2px solid var(--border);
  border-radius: 8px;
  color: var(--faint);
  font-size: 14px;
  font-weight: 800;
}
.choice-text.mono { font-size: 15px; }
.choice.is-selected { border-color: var(--blue-line); background: var(--blue-soft); color: var(--blue-dark); }
.choice.is-selected .key { border-color: var(--blue-line); color: var(--blue); }
.choice.is-correct { border-color: var(--green); background: var(--green-soft); color: var(--green-ink); }
.choice.is-correct .key { border-color: var(--green); color: var(--green-ink); }
.choice.is-wrong { border-color: var(--red); background: var(--red-soft); color: var(--red-ink); animation: shake .4s; }
.choice.is-wrong .key { border-color: var(--red); color: var(--red-ink); }
.choice.is-reveal { border-color: var(--green); border-style: dashed; }

/* Lückentext */
.tiles { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.tile {
  padding: 10px 16px;
  border: 2px solid var(--border);
  border-bottom-width: 4px;
  border-radius: 12px;
  background: var(--card);
  font-size: 16px;
  font-weight: 700;
  white-space: pre;
  transition: transform .08s, background .12s;
}
.tile:hover { background: var(--surface); }
.tile:active { transform: translateY(2px); border-bottom-width: 2px; }
.tile.is-used { background: var(--border); border-color: var(--border); color: transparent; pointer-events: none; }

.slot {
  display: inline-block;
  min-width: 64px;
  margin: 0 3px;
  padding: 0 8px;
  border-bottom: 3px solid #6e7681;
  border-radius: 6px 6px 0 0;
  color: #fff;
  font-family: var(--mono);
  font-weight: 700;
  text-align: center;
  vertical-align: bottom;
  line-height: 1.5;
}
.slot.is-filled { background: rgba(28, 176, 246, .22); border-bottom-color: var(--blue); animation: pop .2s var(--ease); }
.slot.is-correct { background: rgba(88, 204, 2, .25); border-bottom-color: var(--green); }
.slot.is-wrong { background: rgba(255, 75, 75, .25); border-bottom-color: var(--red); }

/* Code sortieren */
.order-area {
  display: flex; flex-direction: column; gap: 8px;
  min-height: 140px;
  margin-bottom: 20px;
  padding: 12px;
  border: 2px dashed var(--border-strong);
  border-radius: 14px;
  transition: border-color .2s, background .2s;
}
.order-area.is-correct { border-style: solid; border-color: var(--green); background: var(--green-soft); }
.order-area.is-wrong { border-style: solid; border-color: var(--red); background: var(--red-soft); }
.order-hint { margin: auto; display: flex; align-items: center; gap: 8px; color: var(--faint); font-weight: 700; text-align: center; }
.order-bank { display: grid; gap: 8px; }

.code-tile, .code-line {
  display: block;
  width: 100%;
  padding: 10px 14px;
  text-align: left;
  border-radius: 10px;
  background: var(--code-bg);
  color: var(--code-text);
  font-family: var(--mono);
  font-size: 14px;
  white-space: pre;
  overflow-x: auto;
  border: 2px solid rgba(255, 255, 255, .08);
  border-bottom: 4px solid #000;
  transition: transform .08s, opacity .15s;
}
.code-tile:hover, .code-line:hover { filter: brightness(1.2); }
.code-tile:active { transform: translateY(2px); }
.code-tile.is-used { opacity: .18; pointer-events: none; }
.code-line { animation: pop .18s var(--ease); }

/* Tippen */
.type-input {
  width: 100%;
  padding: 16px 18px;
  border: 2px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  font-size: 18px;
  transition: border-color .15s;
}
.type-input:focus { outline: none; border-color: var(--blue); }
.type-input.is-correct { border-color: var(--green); background: var(--green-soft); color: var(--green-ink); }
.type-input.is-wrong { border-color: var(--red); background: var(--red-soft); color: var(--red-ink); animation: shake .4s; }

/* Footer & Feedback */
.lesson-footer {
  position: sticky; bottom: 0;
  border-top: 2px solid var(--border);
  background: var(--bg);
  transition: background .2s;
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  max-width: 1040px;
  margin: 0 auto;
  padding: 24px 16px;
}
.footer-btn { min-width: 150px; }
.footer-inner > .btn:only-child { margin-left: auto; }
.lesson-footer.is-correct { background: var(--green-soft); border-top-color: transparent; }
.lesson-footer.is-wrong { background: var(--red-soft); border-top-color: transparent; }

.feedback { display: none; align-items: flex-start; gap: 16px; min-width: 0; animation: slide-up .25s var(--ease); }
.is-correct .feedback, .is-wrong .feedback { display: flex; }
.fb-icon {
  width: 64px; height: 64px;
  flex-shrink: 0;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--card);
  font-size: 30px;
}
.is-correct .fb-icon { color: var(--green); }
.is-wrong .fb-icon { color: var(--red); }
.fb-body { min-width: 0; }
.fb-body h2 { font-size: 22px; font-weight: 900; }
.is-correct .fb-body { color: var(--green-ink); }
.is-wrong .fb-body { color: var(--red-ink); }
.fb-combo { font-weight: 800; }
.fb-label { font-weight: 800; font-size: 14px; margin-top: 2px; }
.fb-solution { font-weight: 700; font-size: 16px; }
.fb-code {
  margin-top: 6px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--code-bg);
  color: var(--code-text);
  font-family: var(--mono);
  font-size: 13px;
  white-space: pre;
  overflow-x: auto;
  max-width: 560px;
}
.fb-explain { font-size: 15px; font-weight: 700; opacity: .85; margin-top: 4px; }

/* Ergebnis */
.result { text-align: center; padding-top: 8px; animation: slide-up .4s var(--ease); }
.result-badge {
  width: 112px; height: 112px;
  margin: 0 auto 18px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--gold);
  color: #fff;
  font-size: 50px;
  box-shadow: 0 8px 0 var(--gold-dark);
  animation: pop .5s var(--ease);
}
.result-badge.is-perfect { background: var(--purple); box-shadow: 0 8px 0 #a568cc; }
.result h1 { font-size: 30px; font-weight: 900; color: var(--gold-dark); }
.result-badge.is-perfect + h1 { color: var(--purple); }
.result-sub { color: var(--muted); font-weight: 700; margin-top: 4px; }
.boost-tag { display: inline-flex; align-items: center; gap: 4px; color: var(--gold-dark); font-weight: 900; }

.result-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 28px 0 22px; }
.rstat {
  border: 2px solid var(--c);
  border-radius: 16px;
  background: var(--c);
  overflow: hidden;
}
.rstat > span {
  display: block;
  padding: 4px 6px 3px;
  color: #fff;
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .6px;
}
.rstat > strong {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  padding: 12px 6px;
  border-radius: 13px;
  background: var(--card);
  color: var(--c);
  font-size: 20px;
}
.rstat b { font-weight: 900; }

.result-streak { color: var(--orange); font-weight: 900; font-size: 19px; margin-bottom: 18px; }
.result-streak small { color: var(--muted); font-weight: 700; font-size: 13px; }

.result-goal { text-align: left; }
.result-goal p { display: flex; justify-content: space-between; font-weight: 800; margin-bottom: 8px; }
.result-goal p span:last-child { color: var(--muted); }

.result-ach { margin-top: 28px; text-align: left; }
.result-ach h2 { font-size: 18px; font-weight: 900; margin-bottom: 10px; }
.result-ach ul { display: grid; gap: 10px; }
.result-ach li {
  display: flex; align-items: center; gap: 14px;
  padding: 12px;
  border: 2px solid var(--border);
  border-radius: 14px;
  animation: pop .4s var(--ease) both;
}
.result-ach strong { display: block; }
.result-ach small { color: var(--blue); font-weight: 800; }

/* Dialoge & Toast */
.modal {
  margin: auto;
  width: calc(100% - 32px);
  max-width: 420px;
  padding: 28px 24px 22px;
  border: 0;
  border-radius: 22px;
  background: var(--card);
  color: var(--text);
  text-align: center;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .35);
}
.modal::backdrop { background: rgba(0, 0, 0, .55); }
.modal[open] { animation: pop .25s var(--ease); }
.modal h2 { font-size: 24px; font-weight: 900; margin: 16px 0 6px; }
.modal p { color: var(--muted); font-weight: 700; }
.modal-icon {
  width: 72px; height: 72px;
  margin: 0 auto;
  display: grid; place-items: center;
  border-radius: 50%;
  font-size: 32px;
}
.modal-icon.is-blue { background: var(--blue-soft); color: var(--blue); }
.modal-icon.is-red { background: var(--red-soft); color: var(--red); }
.modal-actions { display: grid; gap: 10px; margin-top: 24px; }

.toast {
  position: fixed;
  left: 50%; top: 20px;
  z-index: 100;
  transform: translateX(-50%);
  max-width: calc(100% - 32px);
  padding: 12px 18px;
  border-radius: 12px;
  background: var(--text);
  color: var(--bg);
  font-weight: 800;
  animation: slide-up .25s var(--ease);
}

.confetti {
  position: fixed;
  top: -16px;
  z-index: 90;
  width: 9px; height: 15px;
  border-radius: 2px;
  pointer-events: none;
  animation: fall 3s linear forwards;
}
.confetti.is-burst { top: 38vh; animation: burst 1.4s cubic-bezier(.2, .7, .3, 1) forwards; }

/* ---------- Belohnendes Feedback (nur bei Aktionen, keine Dauer-Animation) ---------- */
.xp-burst {
  position: fixed; z-index: 120;
  transform: translate(-50%, 0);
  font-weight: 900; font-size: 22px;
  pointer-events: none;
  text-shadow: 0 2px 6px rgba(0, 0, 0, .18);
  animation: xpfly .9s ease-out forwards;
}
.combo-flash {
  position: fixed; left: 50%; top: 34%;
  z-index: 120;
  padding: 12px 24px; border-radius: 999px;
  background: var(--c, var(--orange)); color: #fff;
  font-weight: 900; font-size: 24px; white-space: nowrap;
  pointer-events: none;
  box-shadow: 0 12px 34px rgba(0, 0, 0, .28);
  animation: comboflash 1.1s ease-out forwards;
}
.combo-flash i { margin-right: 8px; }
#progress-fill.is-pulse { animation: barpulse .45s ease; }
.choice.is-correct, .slot.is-correct, .type-input.is-correct { animation: popcorrect .4s var(--ease); }
.sound-toggle { color: var(--muted); }
.sound-toggle.is-off { color: var(--faint); }

@keyframes xpfly {
  0% { opacity: 0; transform: translate(-50%, 12px) scale(.6); }
  25% { opacity: 1; transform: translate(-50%, -6px) scale(1.15); }
  100% { opacity: 0; transform: translate(-50%, -74px) scale(1); }
}
@keyframes comboflash {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(.4) rotate(-6deg); }
  25% { opacity: 1; transform: translate(-50%, -50%) scale(1.12) rotate(2deg); }
  70% { opacity: 1; transform: translate(-50%, -50%) scale(1) rotate(0); }
  100% { opacity: 0; transform: translate(-50%, -80%) scale(.9); }
}
@keyframes barpulse { 0% { filter: brightness(1); } 45% { filter: brightness(1.5); } 100% { filter: brightness(1); } }
@keyframes popcorrect { 0% { transform: scale(1); } 40% { transform: scale(1.06); } 100% { transform: scale(1); } }
@keyframes burst {
  0% { opacity: 1; transform: translate(0, 0) rotate(0); }
  100% { opacity: 0; transform: translate(var(--drift, 0), calc(60vh - var(--rise, 0px))) rotate(var(--spin, 360deg)); }
}

/* Screen-Glow: kurzer Rand-Schein bei richtig/falsch */
.screen-glow { position: fixed; inset: 0; z-index: 80; pointer-events: none; opacity: 0; }
.screen-glow.is-ok { animation: glowok .5s ease-out; box-shadow: inset 0 0 90px 10px rgba(88, 204, 2, .5); }
.screen-glow.is-bad { animation: glowbad .5s ease-out; box-shadow: inset 0 0 90px 10px rgba(255, 75, 75, .45); }
@keyframes glowok { 0% { opacity: 0; } 25% { opacity: 1; } 100% { opacity: 0; } }
@keyframes glowbad { 0% { opacity: 0; } 25% { opacity: 1; } 100% { opacity: 0; } }

/* XP-Zahl „knallt" am Ende des Hochzählens */
.is-punch { display: inline-block; animation: punch .5s var(--ease); }
@keyframes punch { 0% { transform: scale(1); } 35% { transform: scale(1.45); color: var(--gold-dark, #e5a800); } 100% { transform: scale(1); } }

/* Rang-Karte auf dem Ergebnis-Screen */
.result-rank { display: flex; align-items: center; gap: 16px; text-align: left; margin: 20px 0; padding: 16px 18px; border: 2px solid var(--border); border-radius: 18px; }
.result-rank .rank-medal { flex: none; display: grid; place-items: center; width: 56px; height: 56px; border-radius: 16px; font-size: 26px; color: #fff; background: var(--c, var(--gold)); box-shadow: inset 0 -5px 0 rgba(0, 0, 0, .18); }
.result-rank .rank-info { flex: 1; min-width: 0; }
.result-rank .rank-info strong { font-size: 20px; font-weight: 900; }
.result-rank .rank-name-line, .result-rank .rank-up-tag { font-size: 12px; font-weight: 900; letter-spacing: .6px; text-transform: uppercase; color: var(--muted); margin-bottom: 2px; }
.result-rank .rank-info .progress > span { background: var(--c, var(--gold)); }
.result-rank .rank-info small { display: block; margin-top: 6px; color: var(--muted); font-weight: 700; font-size: 13px; }
.result-rank.is-up { border-color: var(--c, var(--gold)); background: color-mix(in srgb, var(--c, #ffc800) 12%, transparent); animation: pop .4s var(--ease); }
.result-rank.is-up .rank-up-tag { color: var(--c, var(--gold)); }

/* Sprach-Umschalter im Profil */
.lang-switch { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.lang-switch .btn { flex: 1 1 160px; }

/* =========================================================
   Animationen
   ========================================================= */
@keyframes slide-in { from { opacity: 0; transform: translateX(28px); } to { opacity: 1; transform: none; } }
@keyframes slide-up { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes pop { 0% { transform: scale(.85); opacity: 0; } 70% { transform: scale(1.04); opacity: 1; } 100% { transform: scale(1); } }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}
@keyframes fall {
  to { transform: translate(var(--drift, 0), 110vh) rotate(var(--spin, 360deg)); opacity: .9; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1280px) {
  .app { grid-template-columns: 96px minmax(0, 1fr); }
  .sidebar { align-items: center; padding: 24px 12px; }
  .sidebar .logo { padding: 0 0 26px; }
  .sidebar .logo-text, .nav-link span { display: none; }
  .nav-link { justify-content: center; padding: 12px; }
  .nav-link i { width: auto; }
}

@media (max-width: 1100px) {
  .with-aside { grid-template-columns: 1fr; gap: 32px; }
  .aside { position: static; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
  .aside-stats { display: none; }
  .mobile-stats { display: block; }
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 28px; text-align: center; }
  .hero-art { max-width: 260px; }
  .hero-copy p, .hero-actions { margin-left: auto; margin-right: auto; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .goal-form { grid-template-columns: repeat(2, 1fr); }
  .result-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    top: auto; bottom: 0; left: 0; right: 0;
    z-index: 40;
    height: auto;
    flex-direction: row;
    justify-content: space-around;
    gap: 0;
    padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
    border-right: 0;
    border-top: 2px solid var(--border);
  }
  .sidebar .logo, .nav-logout { display: none; }
  .page-top { padding: 8px 12px; gap: 10px; }
  .topnav-link { padding: 8px 12px; }
  .topnav-link span { font-size: 14px; }
  /* Die Einträge müssen auch auf 320 px passen: gleichmäßig verteilen statt fester Innenabstände */
  .nav-link { flex: 1 1 0; min-width: 0; width: auto; padding: 10px 2px; }
  .nav-link i { font-size: 22px; }
  .content { padding: 20px 16px 110px; }
  .page-title { font-size: 26px; }

  .unit-banner { padding: 16px 18px; }
  .unit-banner h2 { font-size: 20px; }
  .unit-icon { font-size: 48px; }
  .node-wrap { transform: translateX(calc(var(--x, 0) * .7)); }
  .course-head h1 { font-size: 22px; }

  .shop-item { flex-wrap: wrap; }
  .shop-buy { width: 100%; }
  .ach-grid { grid-template-columns: 1fr; }
  .profile-head { gap: 16px; }
  .profile-head .avatar { --size: 72px !important; }

  .ex-title { font-size: 22px; }
  .stage { padding-top: 16px; }
  .footer-inner { flex-direction: column; align-items: stretch; gap: 16px; padding: 16px; }
  .footer-btn { width: 100%; }
  .fb-icon { width: 48px; height: 48px; font-size: 22px; }
  .fb-body h2 { font-size: 20px; }
}

@media (max-width: 560px) {
  .feature-grid { grid-template-columns: 1fr; }
  .landing-header .logo-text { font-size: 24px; }
  .hero { padding: 36px 0 48px; }
  .stat-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat-tile { padding: 12px; gap: 10px; }
  .code-block { font-size: 13px; padding: 14px; }
  .choice { font-size: 16px; }
  .course-head { flex-wrap: wrap; }
  .with-aside > * { min-width: 0; }
}

/* ---------- Lernkarten vor der Abfrage ---------- */
.intro-lead { margin: 0 0 14px; padding: 10px 14px; border-radius: 14px; background: var(--blue-soft, #ddf4ff); color: var(--blue, #1cb0f6); font-weight: 800; }
.intro-lead i { margin-right: 6px; }
.intro-answer { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; margin: 14px 0 0; padding: 12px 14px; border: 2px solid var(--green, #58cc02); border-radius: 14px; font-size: 18px; }
.intro-answer span { font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: .04em; color: var(--green-ink, #58a700); }
.intro-answer code { font-family: "JetBrains Mono", monospace; font-weight: 700; overflow-wrap: anywhere; }
.intro-card .code-block { margin-top: 12px; }
.intro-mark { background: var(--green, #58cc02); color: #fff; border-radius: 4px; padding: 0 3px; }
.intro-explain { margin: 14px 0 0; line-height: 1.55; opacity: .85; }
.intro-explain i { color: var(--blue, #1cb0f6); margin-right: 6px; }
.footer-inner .intro-skip { margin-right: auto; }