/* ═══════════════════════════════════════════════════════
   Obsidian für Einsteiger — Design System
   Shared CSS für Landing, Curriculum und Module
   ═══════════════════════════════════════════════════════ */

/* Base */
:root {
  --bg: #0d1117; --surface: #161b22; --border: #30363d;
  --text: #e6edf3; --muted: #7d8590;
  --accent: #58a6ff; --green: #3fb950; --orange: #d29922;
  --purple: #a78bfa; --pink: #f778ba;
}
*, *::before, *::after { box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif; background: var(--bg); color: var(--text); margin: 0; padding: 0; line-height: 1.7; }
a { color: var(--accent); }
main { max-width: 720px; margin: 0 auto; padding: 2rem 2rem 3rem; }

/* Language Toggle */
.lang-switch { position: fixed; top: 1rem; right: 1rem; display: flex; gap: 0.25rem; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 0.2rem; z-index: 100; }
.lang-switch button { background: none; border: none; color: var(--muted); font-size: 0.75rem; font-weight: 700; cursor: pointer; padding: 0.3rem 0.6rem; border-radius: 6px; }
.lang-switch button.active { background: var(--accent); color: var(--bg); }
.lang-switch button:hover:not(.active) { color: var(--text); }
[lang="de"] .en, [lang="en"] .de { display: none; }

/* Skip Link */
.skip-link { position: absolute; top: -40px; left: 0; background: var(--accent); color: var(--bg); padding: 0.5rem 1rem; z-index: 200; border-radius: 0 0 8px 0; font-weight: 700; text-decoration: none; }
.skip-link:focus { top: 0; }

/* Progress Bar */
.progress-bar { position: fixed; top: 0; left: 0; width: 100%; height: 4px; background: var(--surface); z-index: 150; }
.progress-bar::after { content: ''; display: block; height: 100%; width: var(--progress, 0%); background: linear-gradient(90deg, var(--accent), var(--green)); border-radius: 0 2px 2px 0; transition: width 0.3s; }

/* ─── LANDING PAGE ─── */

.hero { text-align: center; padding: 5rem 2rem 2rem; max-width: 720px; margin: 0 auto; }
.hero h1 { font-size: 2.4rem; font-weight: 800; line-height: 1.15; margin-bottom: 0.75rem; background: linear-gradient(135deg, var(--accent), var(--purple)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero .subtitle { font-size: 1.15rem; color: var(--muted); max-width: 560px; margin: 0 auto 1rem; }
.badge { display: inline-block; background: rgba(88,166,255,0.12); color: var(--accent); padding: 0.4rem 1rem; border-radius: 20px; font-size: 0.85rem; font-weight: 700; letter-spacing: 0.02em; }
.value-prop { color: var(--muted); font-size: 0.95rem; line-height: 1.7; max-width: 560px; margin: 0 auto; }

/* Buttons */
.btn-primary { display: inline-block; background: var(--accent); color: var(--bg); padding: 0.75rem 2rem; border-radius: 8px; text-decoration: none; font-weight: 700; font-size: 0.95rem; transition: all 0.2s; }
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-secondary { display: inline-block; background: var(--surface); color: var(--text); border: 1px solid var(--border); padding: 0.75rem 2rem; border-radius: 8px; text-decoration: none; font-weight: 600; font-size: 0.95rem; transition: all 0.2s; }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* Journey Map */
.journey-map { max-width: 720px; margin: 0 auto; padding: 3rem 2rem; text-align: center; }
.journey-map h2 { font-size: 1.6rem; font-weight: 800; margin-bottom: 1.5rem; }
.journey-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1rem; }
.journey-step { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1.25rem 1rem; text-align: center; transition: border-color 0.2s, transform 0.2s; position: relative; }
.journey-step:hover { border-color: var(--accent); transform: translateY(-2px); }
.step-number { width: 36px; height: 36px; border-radius: 50%; background: rgba(88,166,255,0.15); color: var(--accent); display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 0.9rem; margin: 0 auto 0.75rem; }
.journey-step strong { display: block; font-size: 0.9rem; margin-bottom: 0.4rem; color: var(--text); }
.journey-step .step-desc { font-size: 0.78rem; color: var(--muted); line-height: 1.4; }

/* FAQ / Objection Handling */
.faq { max-width: 720px; margin: 0 auto; padding: 3rem 2rem; }
.faq h2 { font-size: 1.6rem; font-weight: 800; margin-bottom: 1.25rem; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1.25rem; margin-bottom: 0.75rem; transition: border-color 0.2s; }
.faq-item:hover { border-color: var(--accent); }
.faq-item strong { font-size: 0.95rem; display: block; margin-bottom: 0.4rem; }
.faq-item p { color: var(--muted); font-size: 0.85rem; line-height: 1.6; margin: 0; }

/* Story */
.story { max-width: 720px; margin: 0 auto; padding: 3rem 2rem; text-align: center; }
.story blockquote { border-left: 3px solid var(--accent); padding: 1.25rem 1.5rem; margin: 1rem auto; background: rgba(88,166,255,0.05); border-radius: 0 8px 8px 0; font-size: 1rem; line-height: 1.7; text-align: left; max-width: 560px; color: var(--text); }
.story-author { color: var(--muted); font-size: 0.85rem; margin-top: 0.75rem; }

/* ─── CURRICULUM ─── */

.module-list { max-width: 600px; margin: 0 auto; }
.module-card { display: flex; gap: 1.25rem; align-items: flex-start; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1.25rem; margin-bottom: 0.75rem; text-decoration: none; color: var(--text); transition: border-color 0.2s, transform 0.2s; }
.module-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.module-number { font-size: 1.5rem; font-weight: 800; color: var(--accent); min-width: 2.5rem; text-align: center; }
.module-info h3 { font-size: 1rem; font-weight: 700; margin: 0 0 0.3rem; }
.module-info p { color: var(--muted); font-size: 0.85rem; line-height: 1.5; margin: 0; }
.meta { color: var(--muted); font-size: 0.8rem; margin-top: 0.3rem; }
.difficulty { font-size: 0.75rem; display: inline-block; margin-top: 0.3rem; }

/* ─── MODULE PAGES ─── */

.breadcrumb { font-size: 0.85rem; color: var(--muted); margin-bottom: 0.5rem; }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }
.module-counter { font-size: 0.85rem; color: var(--muted); margin-bottom: 0.25rem; }

/* Learning Goals */
.learning-goals { background: rgba(88,166,255,0.08); border: 1px solid rgba(88,166,255,0.2); border-radius: 12px; padding: 1.25rem 1.5rem; margin-bottom: 2rem; }
.learning-goals h3 { font-size: 0.95rem; margin: 0 0 0.5rem; }
.learning-goals ul { margin: 0; padding-left: 1.25rem; }
.learning-goals li { font-size: 0.9rem; margin-bottom: 0.3rem; }

/* Callouts */
.callout { background: rgba(88,166,255,0.08); border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0; padding: 1rem 1.25rem; margin: 1.5rem 0; font-size: 0.9rem; line-height: 1.6; }
.callout-green { background: rgba(63,185,80,0.08); border-left-color: var(--green); }
.callout-orange { background: rgba(210,153,34,0.08); border-left-color: var(--orange); }

/* Diagrams */
.diagram { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; margin: 1.5rem 0; font-family: 'SF Mono', 'Fira Code', monospace; font-size: 0.82rem; line-height: 1.6; white-space: pre; overflow-x: auto; }
.diagram-label { font-family: -apple-system, sans-serif; font-size: 0.8rem; color: var(--muted); margin-bottom: 0.5rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; display: block; white-space: normal; }

/* Comparison Cards */
.comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1.5rem 0; }
.compare-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1.25rem; }
.compare-card.bad { border-color: rgba(248,81,73,0.4); }
.compare-card.good { border-color: rgba(63,185,80,0.4); }
.compare-card h4 { font-size: 0.9rem; margin: 0 0 0.5rem; }
.compare-card p, .compare-card ul { font-size: 0.85rem; color: var(--muted); margin: 0; }
.compare-card ul { padding-left: 1.25rem; }

/* Source Citation */
.source { font-size: 0.78rem; color: var(--muted); background: var(--surface); border-radius: 6px; padding: 0.5rem 0.75rem; margin: 0.75rem 0; border-left: 2px solid var(--purple); }
.source a { color: var(--purple); }

/* Content */
h2 { font-size: 1.4rem; font-weight: 800; margin: 2.5rem 0 0.75rem; }
h3 { font-size: 1.1rem; font-weight: 700; margin: 1.5rem 0 0.5rem; color: var(--accent); }
p { line-height: 1.7; margin: 0.75rem 0; }
ol, ul { line-height: 1.7; padding-left: 1.5rem; }
li { margin-bottom: 0.3rem; }
pre { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 1rem 1.25rem; overflow-x: auto; font-size: 0.82rem; line-height: 1.5; }
code { background: rgba(88,166,255,0.1); color: var(--accent); padding: 0.15rem 0.4rem; border-radius: 4px; font-size: 0.85rem; }
pre code { background: none; color: var(--text); padding: 0; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.88rem; }
th, td { padding: 0.6rem 0.75rem; text-align: left; border-bottom: 1px solid var(--border); }
th { font-weight: 700; color: var(--text); }
td { color: var(--muted); }
blockquote { border-left: 3px solid var(--accent); padding: 0.75rem 1.25rem; margin: 1rem 0; background: rgba(88,166,255,0.05); border-radius: 0 8px 8px 0; font-size: 0.95rem; }

/* Glossary Widget */
.glossary-toggle { position: fixed; bottom: 1.5rem; right: 1.5rem; background: var(--surface); border: 1px solid var(--border); color: var(--text); padding: 0.6rem 1rem; border-radius: 20px; cursor: pointer; font-size: 0.8rem; font-weight: 700; z-index: 100; transition: all 0.2s; }
.glossary-toggle:hover { border-color: var(--accent); color: var(--accent); }
.glossary-panel { display: none; position: fixed; bottom: 4rem; right: 1.5rem; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1.25rem; width: 280px; max-height: 400px; overflow-y: auto; z-index: 100; box-shadow: 0 8px 32px rgba(0,0,0,0.4); }
.glossary-panel.open { display: block; }
.glossary-panel h3 { font-size: 0.9rem; margin: 0 0 0.75rem; color: var(--accent); }
.glossary-panel dt { font-weight: 700; font-size: 0.85rem; color: var(--text); margin-top: 0.5rem; }
.glossary-panel dd { font-size: 0.8rem; color: var(--muted); margin: 0.15rem 0 0.5rem 0; line-height: 1.4; }

/* Navigation */
.nav-buttons { display: flex; justify-content: space-between; margin: 2.5rem 0; flex-wrap: wrap; gap: 1rem; }

/* Footer */
footer { text-align: center; padding: 2rem; color: var(--muted); font-size: 0.8rem; border-top: 1px solid var(--border); }
footer a { color: var(--muted); }
footer a:hover { color: var(--accent); }
.footer-line { margin-top: 0.3rem; }

/* ─── RESPONSIVE ─── */

@media (max-width: 600px) {
  .hero h1 { font-size: 1.8rem; }
  .hero { padding: 4rem 1.25rem 1.5rem; }
  main { padding: 1.5rem 1.25rem; }
  .journey-steps { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .comparison { grid-template-columns: 1fr; }
  section, .journey-map, .faq, .story { padding: 2rem 1.25rem; }
  .module-card { flex-direction: column; gap: 0.75rem; }
  .glossary-panel { width: calc(100vw - 3rem); right: 1.5rem; }
}