/* ─────────────────────────────────────────────────────────────────────────────
   BesserStudy — Shared Blog CSS  v2
   ─────────────────────────────────────────────────────────────────────────── */

/* ── Google Fonts: Inter (body) + Plus Jakarta Sans (display) ────────────── */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@600;700;800;900&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg: #f5f6fa;
  --card: #ffffff;
  --text: #111828;
  --muted: #52596a;
  --line: #e2e7f0;
  --blue: #2f74ea;
  --blue-deep: #1a54c4;
  --blue-2: #7daeff;
  --blue-soft: #e8f1ff;
  --green: #16a85f;
  --green-soft: #e6fdf2;
  --shadow: 0 12px 32px rgba(20, 30, 55, 0.08);
  --radius: 22px;
  --radius-sm: 14px;
  --font-display: 'Plus Jakarta Sans', Inter, ui-sans-serif, system-ui, sans-serif;
  --font-body: Inter, ui-sans-serif, system-ui, -apple-system, sans-serif;
  --content-width: 1180px;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: #f4f6fb;
  background-image:
    radial-gradient(ellipse 60% 40% at 10% 0%, rgba(100, 160, 255, 0.13), transparent),
    radial-gradient(ellipse 40% 30% at 90% 5%, rgba(47, 116, 234, 0.07), transparent);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { display: block; width: 100%; height: auto; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* ─── Page Shell ─────────────────────────────────────────────────────────── */
.wrap {
  width: min(calc(100% - 32px), var(--content-width));
  margin: 0 auto;
}
.page-shell { padding: 20px 0 48px; }

/* ─── Nav ────────────────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 10px;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 14px 10px 20px;
  margin-bottom: 28px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  border-radius: 999px;
  box-shadow: 0 8px 28px rgba(20, 30, 55, 0.07);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--text);
  white-space: nowrap;
  flex-shrink: 0;
}
.brand-star { color: var(--blue); }

.top-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.9rem;
}
.top-nav a:hover { color: var(--text); }

/* ─── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 13px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.88rem;
  border: 1.5px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 140ms ease, box-shadow 140ms ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-deep) 100%);
  box-shadow: 0 8px 22px rgba(47, 116, 234, 0.3);
}
.btn-primary:hover { box-shadow: 0 12px 28px rgba(47, 116, 234, 0.42); }
.btn-secondary {
  color: var(--text);
  background: #fff;
  border-color: var(--line);
}
.btn-small {
  padding: 9px 16px;
  font-size: 0.82rem;
  border-radius: 999px;
}

/* ─── Article wrapper ────────────────────────────────────────────────────── */
.article { display: grid; gap: 22px; }
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  color: var(--muted);
  font-size: 0.86rem;
}
.breadcrumbs a:hover { color: var(--blue); }

/* ─── Cards ──────────────────────────────────────────────────────────────── */
.hero-card, .card, .sidebar-card, .cta-card {
  background: var(--card);
  border: 1px solid rgba(208, 216, 232, 0.9);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero-card { padding: 32px; overflow: hidden; }

/* ─── Hero ───────────────────────────────────────────────────────────────── */
.eyebrow-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.pill {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  background: #f0f3fa;
  border: 1px solid var(--line);
  color: var(--muted);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.pill-live {
  background: var(--green-soft);
  color: #0e8048;
  border-color: rgba(22, 168, 95, 0.2);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: center;
}
.overline {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
}
.hero-card h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.6vw, 4rem);
  font-weight: 900;
  line-height: 0.96;
  letter-spacing: -0.04em;
  color: var(--text);
}
.hero-card h1 span {
  background: linear-gradient(130deg, var(--blue) 0%, #6daef8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.lead {
  max-width: 58ch;
  margin: 18px 0 0;
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.7;
}
.hero-actions, .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}
.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding: 0;
  margin: 14px 0 0;
  list-style: none;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
}
.trust-row li::before { content: '✓  '; color: var(--green); }
.hero-figure {
  position: relative;
  padding: 20px;
  background: linear-gradient(150deg, #d4ffe0 0%, #a6f0b8 60%, #82e59a 100%);
  border-radius: 22px;
  overflow: hidden;
}
.hero-figure::after {
  content: "du ↔ Sie";
  position: absolute;
  right: 14px;
  top: 14px;
  padding: 7px 13px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.94);
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 900;
  color: var(--text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

/* ─── AI Summary ─────────────────────────────────────────────────────────── */
.ai-summary { padding: 28px; }
.card-accent {
  background: linear-gradient(160deg, #f0f8ff 0%, #e5effd 100%);
  border-color: rgba(100, 160, 255, 0.18);
}
.section-head { margin-bottom: 16px; }
.section-head.compact { margin-bottom: 10px; }
.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text);
}

/* ─── Content grid ───────────────────────────────────────────────────────── */
.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 295px;
  gap: 20px;
  align-items: start;
}
.content-main { display: grid; gap: 20px; min-width: 0; }
.content-side { position: sticky; top: 86px; display: grid; gap: 16px; min-width: 0; }
.card, .sidebar-card { padding: 24px; }

/* ─── Prose ──────────────────────────────────────────────────────────────── */
.prose p {
  margin: 0 0 13px;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.72;
}
.prose p:last-child { margin-bottom: 0; }
.prose li, .prose td, .prose th { color: var(--muted); }
.prose strong { color: var(--text); font-weight: 700; }
.prose h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
  line-height: 1.25;
}
.key-list, .two-col-list ul, .mini-list, .link-list {
  margin: 0;
  padding-left: 1.1rem;
}
.key-list li, .two-col-list li, .mini-list li, .link-list li {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.62;
}
.link-list a:hover { color: var(--blue); text-decoration: underline; }
.ai-note { margin-top: 14px; font-size: 0.87rem; color: var(--muted); }
.ai-note span {
  display: inline-block;
  margin: 4px 5px 0 0;
  padding: 5px 10px;
  background: rgba(255,255,255,0.9);
  border: 1px solid rgba(100, 160, 255, 0.22);
  border-radius: 999px;
  color: var(--text);
  font-weight: 700;
  font-size: 0.8rem;
}

/* ─── Rule box ───────────────────────────────────────────────────────────── */
.rule-box {
  padding: 18px 22px;
  margin-bottom: 18px;
  background: linear-gradient(160deg, #fdfeff 0%, #eef5ff 100%);
  border: 1.5px solid rgba(100, 160, 255, 0.2);
  border-radius: 16px;
}
.rule-label {
  margin: 0 0 6px;
  color: var(--blue);
  font-size: 0.69rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.rule-text {
  margin: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 800;
  line-height: 1.4;
}

/* ─── Two-col / scenario / mistake ──────────────────────────────────────── */
.two-col-list, .scenario-list, .mistake-list { display: grid; gap: 12px; }
.two-col-list { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 16px; }
.scenario-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.scenario-card, .mistake-item {
  padding: 16px 18px;
  background: linear-gradient(160deg, #f8faff 0%, #f2f6fd 100%);
  border: 1px solid var(--line);
  border-radius: 15px;
}

/* ─── Content figures ────────────────────────────────────────────────────── */
.content-figure {
  overflow: hidden;
  margin: 0 0 18px;
  border-radius: 16px;
  border: 1px solid var(--line);
  max-width: 100%;
}
.content-figure.narrow { max-width: 580px; }

/* ─── Table ──────────────────────────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 14px;
  border: 1px solid var(--line);
}
.table-wrap table { width: 100%; border-collapse: collapse; min-width: 440px; }
.table-wrap thead { background: linear-gradient(160deg, #f3f6fd 0%, #edf2fb 100%); }
.table-wrap th, .table-wrap td {
  padding: 13px 15px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  font-size: 0.91rem;
}
.table-wrap th {
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.82rem;
  letter-spacing: 0.01em;
}
.table-wrap tr:last-child td { border-bottom: none; }
.small-note { margin-top: 12px; font-size: 0.87rem; color: var(--muted); line-height: 1.55; }

/* ─── Quiz & FAQ ─────────────────────────────────────────────────────────── */
.quiz-stack, .faq-list { display: grid; gap: 9px; }
.quiz-card, .faq-list details {
  border: 1.5px solid var(--line);
  border-radius: 15px;
  background: #fafcff;
  overflow: hidden;
  transition: border-color 140ms;
}
.quiz-card:hover, .faq-list details:hover { border-color: rgba(47, 116, 234, 0.28); }
.quiz-card summary, .faq-list summary {
  cursor: pointer;
  list-style: none;
  padding: 14px 17px;
  font-weight: 700;
  font-size: 0.93rem;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.quiz-card summary::after, .faq-list summary::after {
  content: '+';
  color: var(--blue);
  font-size: 1.2rem;
  font-weight: 700;
  flex-shrink: 0;
  transition: transform 180ms ease;
}
.quiz-card[open] summary::after, .faq-list details[open] summary::after { transform: rotate(45deg); }
.quiz-card summary::-webkit-details-marker, .faq-list summary::-webkit-details-marker { display: none; }
.quiz-answer, .faq-list details p {
  padding: 0 17px 15px;
  margin: 0;
  color: var(--muted);
  font-size: 0.91rem;
  line-height: 1.65;
}

/* ─── CTA card ───────────────────────────────────────────────────────────── */
.cta-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  padding: 30px;
  align-items: center;
  background: linear-gradient(135deg, #0f1320 0%, #162048 60%, #1a2860 100%);
  color: #fff;
  border-color: rgba(100, 160, 255, 0.12);
}
.cta-card h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.4vw, 1.85rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: #fff;
}
.cta-card p { color: rgba(255,255,255,0.7); margin: 8px 0 0; font-size: 0.93rem; }
.cta-card .overline { color: var(--blue-2); }

/* ─── Sidebar ────────────────────────────────────────────────────────────── */
.sidebar-kicker {
  margin: 0 0 9px;
  font-family: var(--font-display);
  color: var(--blue);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.sidebar-card h3 {
  margin: 0 0 9px;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--text);
}
.sidebar-card p, .sidebar-card li { color: var(--muted); font-size: 0.91rem; }
.sidebar-image-card { padding: 14px; }
.sidebar-image-card img { border-radius: 14px; border: 1px solid var(--line); margin-bottom: 10px; }

/* ─── Footer ─────────────────────────────────────────────────────────────── */
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0 8px;
  margin-top: 28px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--text);
  margin: 0;
}
.footer-copy { margin: 3px 0 0; font-size: 0.84rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; font-size: 0.87rem; font-weight: 600; }
.footer-links a:hover { color: var(--text); }

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 1040px) {
  .hero-grid, .content-grid, .cta-card { grid-template-columns: 1fr; }
  .content-side { position: static; }
}

@media (max-width: 760px) {
  /* Nav: hide links on mobile — brand + CTA only */
  .top-nav { display: none; }
  .site-header { border-radius: 20px; padding: 9px 12px 9px 16px; }

  .hero-card, .card, .sidebar-card, .cta-card { padding: 18px; border-radius: 18px; }
  .hero-card h1 { font-size: clamp(1.85rem, 10vw, 2.7rem); }
  .lead { font-size: 0.95rem; }

  .hero-actions, .cta-actions { flex-direction: column; }
  .hero-actions .btn, .cta-actions .btn { width: 100%; justify-content: center; }

  .scenario-list, .two-col-list, .mistake-list { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 1.35rem; }
  .cta-card { gap: 16px; }
  .site-footer { flex-direction: column; align-items: flex-start; gap: 10px; }
}

@media (max-width: 480px) {
  .page-shell { padding: 10px 0 32px; }
  .wrap { width: calc(100% - 24px); }
  .hero-card { padding: 16px; }
  .table-wrap table { min-width: 380px; }
}