/* ============================================================
   Deutsch Ecke — shared stylesheet
   Used by the hub landing page and every level (A1 now, A2
   later), so the whole site feels like one designed product
   instead of separate pages bolted together.
   ============================================================ */

:root {
  --bg: #faf7f2;
  --bg-raised: #ffffff;
  --text: #2b2620;
  --text-muted: #6b6357;
  --accent: #a53d3d;
  --accent-soft: #f1e4e0;
  --border: #e4dcd0;
  --shadow: 0 2px 10px rgba(43, 38, 32, 0.08);
  --shadow-lg: 0 10px 30px rgba(43, 38, 32, 0.12);
  --whatsapp: #1f9d5a;
  --whatsapp-bg: #e3f5ea;
  --serif: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 760px;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1a17;
    --bg-raised: #262320;
    --text: #ece6da;
    --text-muted: #a89f8f;
    --accent: #e0837a;
    --accent-soft: #382a29;
    --border: #3a352e;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.45);
    --whatsapp: #3fd47c;
    --whatsapp-bg: #16281e;
  }
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light dark;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.wrap-wide {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- icon system (shared SVG sprite, no emoji) ---------- */

.icon-svg {
  width: 1em;
  height: 1em;
  flex-shrink: 0;
  color: currentColor;
}

/* ---------- top attribution bar ---------- */

.attribution-bar {
  background: var(--accent-soft);
  color: var(--text-muted);
  font-size: 0.78rem;
  text-align: center;
  padding: 7px 20px;
  border-bottom: 1px solid var(--border);
}

.attribution-bar a {
  color: var(--accent);
  font-weight: 700;
}

/* ---------- site header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  background: var(--bg);
}

.site-header .wrap,
.site-header .wrap-wide {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.site-header .brand {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.site-header a.brand:hover {
  text-decoration: none;
  opacity: 0.85;
}

.site-header nav {
  display: flex;
  gap: 18px;
  font-size: 0.95rem;
  flex-wrap: wrap;
}

.site-header nav a {
  color: var(--text-muted);
}

.site-header nav a.current {
  color: var(--accent);
  font-weight: 600;
}

/* ---------- hero / landing ---------- */

.hero {
  padding: 44px 0 30px;
  text-align: center;
}

.hero-logo {
  width: 132px;
  height: 132px;
  margin: 0 auto 22px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.hero-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-logo.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  padding: 10px;
}

.hero-logo-fallback {
  display: none;
  color: var(--accent);
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.05rem;
  text-align: center;
  line-height: 1.3;
}

.hero-logo.placeholder .hero-logo-fallback {
  display: block;
}

.hero h1 {
  font-family: var(--serif);
  font-size: 2.1rem;
  margin: 0 0 10px;
}

.hero p.tagline {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 46ch;
  margin: 0 auto;
}

.hero p.tagline .de {
  font-style: italic;
}

.resume-banner {
  margin: 24px auto 0;
  max-width: 46ch;
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 0.95rem;
}

/* ---------- WhatsApp contact button ---------- */

.whatsapp-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 22px auto 0;
  padding: 11px 20px;
  border-radius: 999px;
  background: var(--whatsapp-bg);
  color: var(--whatsapp);
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid color-mix(in srgb, var(--whatsapp) 35%, transparent);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.whatsapp-btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.whatsapp-btn .icon-svg {
  width: 1.15em;
  height: 1.15em;
}

.whatsapp-footnote {
  text-align: center;
  padding: 4px 0 8px;
}

/* ---------- level cards (hub landing: A1 / A2 / ...) ---------- */

.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  padding: 12px 0 48px;
}

.level-card {
  position: relative;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  box-shadow: var(--shadow), 0 0 0 0 var(--accent-soft);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.25s ease, box-shadow 0.3s ease;
}

a.level-card:hover {
  text-decoration: none;
  transform: translateY(-6px) scale(1.015);
  box-shadow: var(--shadow-lg), 0 0 0 5px var(--accent-soft);
}

.level-badge {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, #ff9e6d));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.3rem;
  box-shadow: 0 6px 16px color-mix(in srgb, var(--accent) 45%, transparent);
  transition: transform 0.25s ease;
}

a.level-card:hover .level-badge {
  transform: scale(1.1) rotate(-6deg);
}

.level-card.disabled .level-badge {
  background: var(--text-muted);
  box-shadow: none;
}

.level-card h2 {
  font-family: var(--serif);
  font-size: 1.25rem;
  margin: 0;
}

.level-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 0;
  flex-grow: 1;
}

.level-card .cta {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent);
}

.level-card.disabled {
  cursor: default;
}

.level-card.disabled .cta {
  color: var(--text-muted);
}

.status-pill {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}

.status-pill.muted {
  background: var(--border);
  color: var(--text-muted);
}

/* ---------- card grid (A1 landing page entry points) ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
  padding: 8px 0 48px;
}

.card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 20px;
  box-shadow: var(--shadow), 0 0 0 0 var(--accent-soft);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform 0.25s ease, box-shadow 0.3s ease;
}

a.card:hover {
  text-decoration: none;
  transform: translateY(-6px) scale(1.015);
  box-shadow: var(--shadow-lg), 0 0 0 5px var(--accent-soft);
}

.card .icon-wrap {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, #ff9e6d));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px color-mix(in srgb, var(--accent) 45%, transparent);
  transition: transform 0.25s ease;
}

a.card:hover .icon-wrap {
  transform: scale(1.1) rotate(-6deg);
}

.card .icon-wrap .icon-svg {
  width: 24px;
  height: 24px;
}

.card h2 {
  font-family: var(--serif);
  font-size: 1.2rem;
  margin: 0;
}

.card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 0;
  flex-grow: 1;
}

.card .cta {
  font-weight: 600;
  font-size: 0.9rem;
}

.card.disabled {
  opacity: 0.6;
}

.card.disabled .icon-wrap {
  background: var(--border);
  color: var(--text-muted);
}

.card.disabled .cta {
  color: var(--text-muted);
}

/* ---------- about / footer note ---------- */

.about-note {
  border-top: 1px solid var(--border);
  padding: 28px 0 48px;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0 40px;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}

.site-footer .footer-links {
  margin-top: 6px;
}

.site-footer .footer-links a {
  color: var(--whatsapp);
  font-weight: 600;
}

/* ---------- table of contents (picture book / book index) ---------- */

.toc-intro {
  padding: 36px 0 8px;
}

.toc-intro h1 {
  font-family: var(--serif);
  font-size: 1.7rem;
  margin: 0 0 8px;
}

.toc-intro p {
  color: var(--text-muted);
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0 0 48px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-list li a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 4px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
}

.toc-list li a:hover {
  background: var(--accent-soft);
  text-decoration: none;
}

.toc-num {
  font-family: var(--serif);
  color: var(--text-muted);
  min-width: 2ch;
  font-variant-numeric: tabular-nums;
}

.toc-titles {
  display: flex;
  flex-direction: column;
}

.toc-de {
  font-weight: 600;
}

.toc-en {
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* ---------- picture book viewer ---------- */

.viewer {
  padding: 28px 0 16px;
}

.back-to-book {
  text-align: center;
  margin-bottom: 18px;
}

.back-to-book a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.88rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.back-to-book a:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.viewer-counter {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.viewer-frame {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  padding: 10px;
}

.viewer-frame img {
  margin: 0 auto;
}

.viewer-caption {
  text-align: center;
  padding: 18px 0 6px;
}

.viewer-caption .de {
  font-family: var(--serif);
  font-size: 1.3rem;
  margin: 0 0 4px;
}

.viewer-caption .en {
  color: var(--text-muted);
  font-size: 0.98rem;
}

.viewer-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 22px 0 36px;
  flex-wrap: wrap;
}

.viewer-controls .nav-btn {
  flex: 1 1 auto;
  text-align: center;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-raised);
  font-weight: 600;
  font-size: 0.95rem;
  min-width: 110px;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.viewer-controls .nav-btn:hover {
  text-decoration: none;
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.viewer-controls .nav-btn.disabled {
  opacity: 0.4;
  pointer-events: none;
  transform: none;
  box-shadow: none;
}

.viewer-jump {
  padding: 0 0 40px;
  text-align: center;
}

.viewer-jump select {
  font-family: var(--sans);
  font-size: 0.9rem;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--text);
  max-width: 100%;
}

.kbd-hint {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  padding-bottom: 40px;
}

/* ---------- written book: chapter layout ---------- */

.book-header {
  padding: 34px 0 6px;
}

.book-kicker {
  color: var(--text-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

.book-header h1 {
  font-family: var(--serif);
  font-size: 2rem;
  margin: 6px 0 4px;
}

.book-header .subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  font-style: italic;
}

.image-link {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 22px 0 8px;
  border: 1px solid var(--border);
  background: var(--bg-raised);
  padding: 14px 18px;
  font-size: 0.95rem;
}

.image-link .icon-svg {
  width: 22px;
  height: 22px;
  color: var(--accent);
  flex-shrink: 0;
}

.image-link .text {
  flex-grow: 1;
}

.image-link .label {
  color: var(--text-muted);
  display: block;
  font-size: 0.82rem;
}

.image-link .cta {
  font-weight: 700;
}

.image-link:hover {
  text-decoration: none;
  box-shadow: var(--shadow);
}

.chapter-body {
  font-size: 1.02rem;
  padding-bottom: 20px;
}

.chapter-body h2 {
  font-family: var(--serif);
  font-size: 1.4rem;
  margin: 40px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}

.chapter-body h3 {
  font-family: var(--serif);
  font-size: 1.15rem;
  margin: 26px 0 10px;
}

.chapter-body p {
  margin: 0 0 14px;
}

.chapter-body ul,
.chapter-body ol {
  margin: 0 0 16px;
  padding-left: 1.4em;
}

.chapter-body li {
  margin-bottom: 6px;
}

.chapter-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 22px;
  font-size: 0.96rem;
}

.chapter-body th,
.chapter-body td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}

.chapter-body th {
  color: var(--text-muted);
  font-weight: 700;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.de-word {
  font-weight: 700;
  color: var(--text);
}

.en {
  color: var(--text-muted);
  font-style: italic;
}

/* colored info boxes: rule / example / mistake / exercise */

.info-box {
  --box-color: var(--accent);
  border-left: 4px solid var(--box-color);
  background: color-mix(in srgb, var(--box-color) 9%, var(--bg-raised));
  padding: 16px 18px;
  margin: 22px 0;
}

.info-box h3,
.info-box h4 {
  margin: 0 0 10px;
  color: var(--box-color);
  font-family: var(--serif);
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.info-box p:last-child,
.info-box ol:last-child,
.info-box ul:last-child {
  margin-bottom: 0;
}

.info-box.rule {
  --box-color: #3b6ea5;
}

.info-box.example {
  --box-color: #2f8f5b;
}

.info-box.mistake {
  --box-color: #c0662d;
}

.info-box.exercise {
  --box-color: #7d5ba6;
}

@media (prefers-color-scheme: dark) {
  .info-box.rule {
    --box-color: #7aa8d8;
  }
  .info-box.example {
    --box-color: #6fcf9c;
  }
  .info-box.mistake {
    --box-color: #e0954f;
  }
  .info-box.exercise {
    --box-color: #b092d6;
  }
}

.exercise-item {
  margin: 0 0 12px;
}

.exercise-item .num {
  font-weight: 700;
  color: var(--box-color, var(--accent));
  margin-right: 6px;
}

.chapter-nav-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 30px 0 10px;
  border-top: 1px solid var(--border);
  margin-top: 20px;
  flex-wrap: wrap;
}

.chapter-nav-bottom .nav-btn {
  flex: 1 1 auto;
  text-align: center;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-raised);
  font-weight: 600;
  font-size: 0.95rem;
  min-width: 110px;
}

.chapter-nav-bottom .nav-btn:hover {
  text-decoration: none;
  box-shadow: var(--shadow);
}

.chapter-jump {
  text-align: center;
  padding: 4px 0 40px;
}

.chapter-jump select {
  font-family: var(--sans);
  font-size: 0.9rem;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--text);
  max-width: 100%;
}

/* book table of contents progress pills */

.toc-list li a.not-ready {
  pointer-events: none;
  opacity: 0.5;
}

.toc-status {
  margin-left: auto;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  white-space: nowrap;
}

.toc-status.pending {
  background: var(--border);
  color: var(--text-muted);
}

/* ---------- responsive tightening for small phones ---------- */

@media (max-width: 420px) {
  .hero h1 {
    font-size: 1.7rem;
  }

  .hero-logo {
    width: 104px;
    height: 104px;
  }

  .site-header nav {
    gap: 12px;
    font-size: 0.88rem;
  }

  .viewer-controls .nav-btn {
    min-width: 0;
  }
}