/* ═══════════════════════════════════════════════
   DeutschLern — Shared Site Styles
   Palette: Navy / Amber / Slate system
   ═══════════════════════════════════════════════ */

:root {
  /* Dark theme (default) */
  --navy:     #0C1220;
  --navy2:    #111827;
  --slate:    #1A2535;
  --slate2:   #243045;
  --border:   #2A3B52;
  --border2:  #1E2D42;
  --amber:    #F59E0B;
  --amber2:   #FBBF24;
  --amber-bg: rgba(245,158,11,0.08);
  --amber-dim:#7A4E08;
  --cream:    #F1F5F9;
  --text:     #CBD5E1;
  --muted:    #64748B;
  --muted2:   #94A3B8;
  --nom:      #3B82F6;
  --akk:      #10B981;
  --dat:      #F59E0B;
  --gen:      #A855F7;
  --nom-bg:   rgba(59,130,246,0.10);
  --akk-bg:   rgba(16,185,129,0.10);
  --dat-bg:   rgba(245,158,11,0.10);
  --gen-bg:   rgba(168,85,247,0.10);
  --nav-h:    60px;
  --radius:   10px;
  --transition: 0.18s ease;
  /* Quiz colours */
  --quiz-bg:     rgba(245,158,11,0.06);
  --quiz-border: var(--amber-dim);
  --q-correct:   #10B981;
  --q-wrong:     #EF4444;
  --q-correct-bg: rgba(16,185,129,0.10);
  --q-wrong-bg:   rgba(239,68,68,0.10);
  --nav-bg:      rgba(12,18,32,0.92);
}

/* ── LIGHT THEME ── */
[data-theme="light"] {
  --navy:     #F8FAFC;
  --navy2:    #F1F5F9;
  --slate:    #FFFFFF;
  --slate2:   #F8FAFC;
  --border:   #E2E8F0;
  --border2:  #EEF2F7;
  --amber:    #D97706;
  --amber2:   #F59E0B;
  --amber-bg: rgba(217,119,6,0.08);
  --amber-dim:#FDE68A;
  --cream:    #1E293B;
  --text:     #334155;
  --muted:    #94A3B8;
  --muted2:   #64748B;
  --nom:      #2563EB;
  --akk:      #059669;
  --dat:      #D97706;
  --gen:      #9333EA;
  --nom-bg:   rgba(37,99,235,0.08);
  --akk-bg:   rgba(5,150,105,0.08);
  --dat-bg:   rgba(217,119,6,0.08);
  --gen-bg:   rgba(147,51,234,0.08);
  --quiz-bg:     rgba(217,119,6,0.05);
  --quiz-border: #FDE68A;
  --nav-bg:      rgba(248,250,252,0.95);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--navy);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  min-height: 100vh;
}

/* ── GLOBAL NAV ── */
#global-nav {
  position: sticky;
  top: 0;
  height: var(--nav-h);
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 500;
  display: flex;
  align-items: center;
  padding: 0 32px;
  gap: 0;
}

.nav-logo {
  font-family: 'Crimson Pro', serif;
  font-size: 21px;
  font-weight: 600;
  color: var(--amber);
  text-decoration: none;
  letter-spacing: 0.01em;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-logo .logo-icon {
  width: 30px; height: 30px;
  background: var(--amber);
  border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; color: var(--navy); font-weight: 700;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 32px;
  flex: 1;
}
.nav-links a {
  font-size: 13px;
  color: var(--muted2);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}
.nav-links a:hover { color: var(--cream); background: var(--slate); }
.nav-links a.active { color: var(--amber); background: var(--amber-bg); }

.nav-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-level-badge {
  font-size: 11px; font-weight: 600; letter-spacing: 0.07em;
  padding: 3px 9px; border-radius: 20px;
  background: var(--slate2); color: var(--muted2); border: 1px solid var(--border);
}

/* hamburger — hidden on desktop */
#nav-toggle {
  display: none;
  background: none; border: 1px solid var(--border);
  border-radius: 7px; padding: 7px 10px;
  color: var(--text); cursor: pointer; font-size: 16px;
  line-height: 1; flex-shrink: 0;
}
#mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: var(--slate);
  border-bottom: 1px solid var(--border);
  padding: 12px 0 20px;
  z-index: 490;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
#mobile-nav.open { display: block; }
#mobile-nav a {
  display: block;
  padding: 12px 28px;
  font-size: 15px;
  color: var(--muted2);
  text-decoration: none;
  border-left: 3px solid transparent;
}
#mobile-nav a:hover, #mobile-nav a.active {
  color: var(--amber); border-left-color: var(--amber);
  background: var(--amber-bg);
}

/* ── FOOTER ── */
#site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-brand {
  font-family: 'Crimson Pro', serif;
  font-size: 18px;
  color: var(--amber);
  font-weight: 600;
}
.footer-note {
  font-size: 13px;
  color: var(--muted);
}
.footer-copy {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
  opacity: 0.7;
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
}
.footer-links a:hover { color: var(--amber); }

/* ── CEFR LEVEL BADGES ── */
.lvl-badge {
  display: inline-flex; align-items: center;
  font-size: 9.5px; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; padding: 2px 7px; border-radius: 3px;
  white-space: nowrap;
}
.lvl-a1 { background: rgba(16,185,129,0.12); color: #34d399; border: 1px solid rgba(16,185,129,0.30); }
.lvl-a2 { background: rgba(20,184,166,0.12); color: #2dd4bf; border: 1px solid rgba(20,184,166,0.30); }
.lvl-b1 { background: rgba(59,130,246,0.12); color: #60a5fa; border: 1px solid rgba(59,130,246,0.30); }
.lvl-b2 { background: rgba(139,92,246,0.12); color: #a78bfa; border: 1px solid rgba(139,92,246,0.30); }
.lvl-c1 { background: rgba(245,158,11,0.12); color: #fbbf24; border: 1px solid rgba(245,158,11,0.30); }
.lvl-c2 { background: rgba(239,68,68,0.12); color: #f87171; border: 1px solid rgba(239,68,68,0.30); }
.level-chips { display: inline-flex; gap: 4px; flex-wrap: wrap; align-items: center; }

/* ── UTILITY ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
}
.tag {
  display: inline-block;
  font-size: 10px; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; padding: 3px 8px; border-radius: 4px;
}
.tag-available { background: rgba(16,185,129,0.12); color: #34d399; border: 1px solid rgba(16,185,129,0.3); }
.tag-soon      { background: rgba(100,116,139,0.15); color: var(--muted2); border: 1px solid var(--border); }

/* ── THEME TOGGLE BUTTON ── */
#theme-toggle {
  background: var(--slate);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 6px 10px;
  color: var(--muted2);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  margin-left: 12px;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
  flex-shrink: 0;
}
#theme-toggle:hover { color: var(--amber); border-color: var(--amber); background: var(--amber-bg); }
#theme-toggle .icon-sun  { display: none; }
#theme-toggle .icon-moon { display: inline; }
[data-theme="light"] #theme-toggle .icon-sun  { display: inline; }
[data-theme="light"] #theme-toggle .icon-moon { display: none; }

/* ── QUIZ COMPONENT ── */
.quiz-box {
  background: var(--quiz-bg);
  border: 1px solid var(--quiz-border);
  border-radius: 12px;
  padding: 24px;
  margin: 28px 0;
}
.quiz-header {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 20px; padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap; gap: 8px;
}
.quiz-icon { font-size: 20px; flex-shrink: 0; }
.quiz-title {
  font-family: 'Crimson Pro', serif;
  font-size: 19px; color: var(--cream); font-weight: 600; flex: 1;
  min-width: 0;
}
.quiz-score {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--amber);
  background: var(--amber-bg); border: 1px solid var(--amber-dim);
  padding: 3px 10px; border-radius: 20px; white-space: nowrap; flex-shrink: 0;
}

/* Questions list */
.quiz-questions { display: flex; flex-direction: column; gap: 0; }
.quiz-q {
  padding: 16px 0;
  border-bottom: 1px solid var(--border2);
}
.quiz-q:last-child { border-bottom: none; }

/* Question prompt */
.quiz-prompt {
  font-size: 14px; color: var(--cream); line-height: 1.65;
  margin-bottom: 12px; font-weight: 500;
}
.quiz-prompt em, .quiz-prompt code {
  font-family: 'JetBrains Mono', monospace; font-size: 13px;
  background: var(--slate2); padding: 1px 5px; border-radius: 3px;
  color: var(--amber); font-style: normal;
}

/* Radio option labels */
.quiz-options {
  display: flex; flex-direction: column; gap: 7px;
}
.quiz-options label {
  display: flex; align-items: center; gap: 10px;
  background: var(--slate); border: 1px solid var(--border);
  border-radius: 8px; padding: 9px 14px;
  cursor: pointer; font-size: 13.5px; color: var(--muted2);
  transition: border-color var(--transition), background var(--transition), color var(--transition);
  user-select: none; -webkit-tap-highlight-color: transparent;
  line-height: 1.4;
}
.quiz-options label:hover { border-color: var(--amber-dim); color: var(--cream); background: var(--slate2); }
.quiz-options input[type="radio"] {
  accent-color: var(--amber);
  width: 16px; height: 16px; flex-shrink: 0; cursor: pointer;
}
/* Result states */
.quiz-options label.correct {
  background: var(--q-correct-bg); border-color: var(--q-correct); color: var(--q-correct);
}
.quiz-options label.wrong {
  background: var(--q-wrong-bg); border-color: var(--q-wrong); color: var(--q-wrong);
}
.q-result-correct > .quiz-prompt::after { content: ' ✓'; color: var(--q-correct); font-size: 12px; }
.q-result-wrong   > .quiz-prompt::after { content: ' ✗'; color: var(--q-wrong);   font-size: 12px; }

/* Fill-in-the-blank */
.quiz-fill {
  background: var(--slate); border: 1px solid var(--border);
  color: var(--text); font-size: 14px; padding: 8px 12px;
  border-radius: 7px; font-family: 'JetBrains Mono', monospace;
  outline: none; width: 100%; max-width: 240px;
  transition: border-color var(--transition), background var(--transition);
  -webkit-appearance: none;
}
.quiz-fill:focus { border-color: var(--amber-dim); }
.quiz-fill.fill-correct { border-color: var(--q-correct); background: var(--q-correct-bg); color: var(--q-correct); }
.quiz-fill.fill-wrong   { border-color: var(--q-wrong);   background: var(--q-wrong-bg);   color: var(--q-wrong); }
.quiz-fill-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }

/* Check button (injected by quiz.js for fill-in questions) */
.quiz-check {
  background: var(--slate2); border: 1px solid var(--border);
  color: var(--muted2); font-size: 12px; font-weight: 600;
  padding: 8px 16px; border-radius: 7px; cursor: pointer;
  font-family: 'Inter', sans-serif;
  transition: all var(--transition);
  min-height: 36px; min-width: 64px;
}
.quiz-check:hover:not(:disabled) { border-color: var(--amber-dim); color: var(--amber); background: var(--amber-bg); }
.quiz-check:disabled { opacity: 0.5; cursor: default; }

/* Explanation text */
.quiz-explain {
  margin-top: 10px; padding: 8px 12px;
  font-size: 12.5px; line-height: 1.6; border-radius: 6px;
  border-left: 3px solid var(--border);
  background: var(--slate2); color: var(--muted2);
}
.quiz-explain.explain-ok  { border-left-color: var(--q-correct); color: var(--q-correct); background: var(--q-correct-bg); }
.quiz-explain.explain-err { border-left-color: var(--q-wrong);   color: var(--q-wrong);   background: var(--q-wrong-bg); }
.quiz-explain em { font-style: italic; font-weight: 500; }

/* Result bar */
.quiz-result {
  margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border);
  display: none; align-items: center; gap: 12px; flex-wrap: wrap;
}
.quiz-result.show { display: flex; }
.result-score { font-family: 'JetBrains Mono', monospace; font-size: 24px; color: var(--amber); }
.result-msg { font-size: 13px; color: var(--muted2); flex: 1; min-width: 120px; }
.quiz-retry {
  background: var(--amber); color: var(--navy);
  font-size: 12px; font-weight: 700; letter-spacing: 0.04em;
  padding: 8px 18px; border-radius: 7px; border: none; cursor: pointer;
  font-family: 'Inter', sans-serif;
  transition: background var(--transition), transform var(--transition);
  min-height: 36px;
}
.quiz-retry:hover { background: var(--amber2); transform: translateY(-1px); }

/* ── RESPONSIVE NAV ── */
/* Theme toggle always visible, outside nav-right */
#theme-toggle { display: flex; align-items: center; justify-content: center; flex-shrink: 0; }

@media (max-width: 768px) {
  #global-nav { padding: 0 16px; }
  .nav-links { display: none; }
  .nav-right { display: none; }
  #nav-toggle { display: flex; align-items: center; }
  .container { padding: 0 16px; }
  #site-footer { padding: 24px 16px; flex-direction: column; align-items: flex-start; gap: 12px; }
}
/* Mobile quiz tweaks */
@media (max-width: 600px) {
  .quiz-box { padding: 16px; margin: 20px 0; }
  .quiz-title { font-size: 16px; }
  .quiz-options label { padding: 10px 12px; font-size: 14px; }
  .quiz-fill { max-width: 100%; }
  .result-score { font-size: 20px; }
}

/* ── LEGACY QUIZ FORMAT (.q-opt buttons) ── */
.q-text { font-size: 14px; color: var(--cream); margin-bottom: 10px; line-height: 1.6; }
.q-options { display: flex; flex-direction: column; gap: 7px; margin-bottom: 10px; }
.q-opt {
  background: var(--slate); border: 1px solid var(--border);
  color: var(--text); border-radius: 7px; padding: 9px 14px;
  font-size: 13.5px; font-family: 'Inter', sans-serif;
  text-align: left; cursor: pointer; transition: border-color var(--transition), background var(--transition);
}
.q-opt:hover:not(:disabled) { border-color: var(--amber); background: var(--amber-bg); }
.q-opt.q-correct { border-color: var(--q-correct); background: var(--q-correct-bg); color: var(--q-correct); font-weight: 600; }
.q-opt.q-wrong   { border-color: var(--q-wrong);   background: var(--q-wrong-bg);   color: var(--q-wrong);   }
.q-opt:disabled  { cursor: default; }
.q-fill { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; }
.q-fill-text { font-size: 14px; color: var(--cream); display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.q-input {
  background: var(--slate); border: 1px solid var(--border);
  color: var(--text); padding: 6px 10px; border-radius: 6px;
  font-size: 14px; font-family: 'JetBrains Mono', monospace;
  width: 120px; outline: none;
}
.q-input:focus { border-color: var(--amber); }
.q-check {
  background: var(--amber); color: var(--navy);
  border: none; border-radius: 6px; padding: 6px 14px;
  font-size: 12.5px; font-weight: 600; cursor: pointer;
  font-family: 'Inter', sans-serif;
}
.q-check:hover:not(:disabled) { background: var(--amber2); }
.q-check:disabled { opacity: 0.5; cursor: default; }
.q-feedback { font-size: 13px; margin-top: 6px; line-height: 1.5; min-height: 1em; }
.q-fb-ok  { color: var(--q-correct); }
.q-fb-err { color: var(--q-wrong); }