/* ============================================================
   Praxishandbuch Vereine - styles.css
   Mobile-first; Breakpoints 600px (tablet) und 960px (desktop)
   ============================================================ */

:root {
  /* Farben */
  --color-primary: #04D7C9;          /* Minty */
  --color-primary-dark: #03B8AC;     /* Hover-State */
  --color-secondary: #003B49;        /* Deepblue - Headlines, Text */
  --color-bg: #FAFAFA;
  --color-bg-alt: #FFFFFF;
  --color-text: #1A2B30;             /* Body */
  --color-text-muted: #5A6B70;
  --color-border: #E2E6E8;
  --color-error: #C0392B;
  --color-success: #1E8449;

  /* Typografie - Fluid */
  --font-family: 'Mulish', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --fs-h1: clamp(2rem, 1.4rem + 2.8vw, 3.25rem);
  --fs-h2: clamp(1.5rem, 1.15rem + 1.6vw, 2.25rem);
  --fs-h3: clamp(1.25rem, 1.05rem + 0.9vw, 1.625rem);
  --fs-body: clamp(1rem, 0.96rem + 0.18vw, 1.125rem);
  --fs-small: 0.875rem;
  --lh-tight: 1.2;
  --lh-base: 1.6;

  /* Spacing-Skala (8px-Raster) */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-24: 6rem;

  /* Layout */
  --max-content: 1100px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 3px rgba(0, 59, 73, 0.08);
  --shadow-md: 0 6px 20px rgba(0, 59, 73, 0.1);

  /* Uebergaenge */
  --transition: 180ms ease-out;

  --gutter: var(--sp-4);
}
@media (min-width: 600px) { :root { --gutter: var(--sp-8); } }
@media (min-width: 960px) { :root { --gutter: var(--sp-12); } }

/* --- Globale Basis --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-family);
  font-size: var(--fs-body);
  line-height: var(--lh-base);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { color: var(--color-secondary); line-height: var(--lh-tight); margin: 0 0 var(--sp-4); }
h1 { font-size: var(--fs-h1); font-weight: 700; }
h2 { font-size: var(--fs-h2); font-weight: 700; }
h3 { font-size: var(--fs-h3); font-weight: 600; }
p { margin: 0 0 var(--sp-4); }
a { color: var(--color-secondary); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--color-primary-dark); }
.container { max-width: var(--max-content); margin: 0 auto; padding: 0 var(--gutter); }
:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 3px; border-radius: 3px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* --- Skip-Link --- */
.skip-link {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  background: var(--color-secondary);
  color: #fff;
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-sm);
  z-index: 1000;
  text-decoration: none;
}
.skip-link:focus {
  left: var(--sp-4);
  top: var(--sp-4);
  width: auto;
  height: auto;
  color: #fff;
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  background: var(--color-bg-alt);
  z-index: 50;
  box-shadow: var(--shadow-sm);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding-block: var(--sp-3);
}
.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  text-decoration: none;
  color: var(--color-secondary);
}
.site-header__brand:hover { color: var(--color-secondary); }
.site-header__logo {
  flex-shrink: 0;
  height: 44px;
  width: auto;
  display: block;
}
.site-header__brandtext {
  display: none;
  line-height: 1.15;
  border-left: 1px solid var(--color-border);
  padding-left: var(--sp-3);
  margin-left: var(--sp-1);
}
.site-header__brandtext span {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 600;
  letter-spacing: 0.02em;
}
@media (min-width: 600px) {
  .site-header__brandtext { display: inline-flex; align-items: center; }
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  background: transparent;
  border: 2px solid var(--color-secondary);
  color: var(--color-secondary);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-pill);
  font-family: var(--font-family);
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
}
.nav-toggle:hover { background: var(--color-secondary); color: #fff; }

.site-nav { display: none; }
.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.site-nav a {
  display: block;
  padding: var(--sp-3) var(--sp-4);
  text-decoration: none;
  color: var(--color-secondary);
  font-weight: 600;
  border-radius: var(--radius-sm);
}
.site-nav a:hover { background: var(--color-bg); color: var(--color-secondary); }

.site-nav.is-open {
  display: block;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg-alt);
  padding: var(--sp-4);
  box-shadow: var(--shadow-md);
  border-top: 1px solid var(--color-border);
}

@media (min-width: 600px) {
  .nav-toggle { display: none; }
  .site-nav,
  .site-nav.is-open {
    display: block;
    position: static;
    padding: 0;
    box-shadow: none;
    border-top: 0;
  }
  .site-nav ul {
    flex-direction: row;
    align-items: center;
    gap: var(--sp-2);
  }
  .site-nav a { padding: var(--sp-2) var(--sp-3); }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  border-radius: var(--radius-pill);
  font-weight: 600;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), transform var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  min-height: 44px;
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.2;
}
.btn--primary { background: var(--color-primary); color: var(--color-secondary); }
.btn--primary:hover { background: var(--color-primary-dark); color: var(--color-secondary); }
.btn--ghost { background: transparent; color: var(--color-secondary); border-color: var(--color-secondary); }
.btn--ghost:hover { background: var(--color-secondary); color: #fff; }
.btn--sm { padding: var(--sp-2) var(--sp-4); min-height: 36px; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* --- Hero --- */
.hero {
  padding-block: var(--sp-16) var(--sp-12);
  background: linear-gradient(180deg, #FFFFFF 0%, var(--color-bg) 100%);
}
.hero__eyebrow {
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-size: var(--fs-small);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin: 0 0 var(--sp-3);
}
.hero__title { margin-bottom: var(--sp-4); max-width: 22ch; }
.hero__lead {
  font-size: clamp(1.05rem, 1rem + 0.5vw, 1.25rem);
  color: var(--color-text);
  max-width: 60ch;
  margin-bottom: var(--sp-8);
}
.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

/* --- Sections --- */
.section { padding-block: var(--sp-12); }
.section--alt { background: var(--color-bg-alt); }
.section__head { max-width: 65ch; margin-bottom: var(--sp-8); }

/* --- Buchgrid + Buchkachel --- */
.book-grid {
  display: grid;
  gap: var(--sp-6);
  grid-template-columns: 1fr;
}
@media (min-width: 600px) {
  .book-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 960px) {
  .book-grid { grid-template-columns: repeat(3, 1fr); }
}

.book-card {
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.book-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.book-card__link {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  height: 100%;
}
.book-card__link:hover { color: inherit; }
.book-card__cover {
  background: linear-gradient(180deg, #003B49 0%, #04D7C9 100%);
  aspect-ratio: 600 / 848;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.book-card__cover img { width: 100%; height: 100%; object-fit: cover; }
.book-card__body {
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  flex: 1 1 auto;
}
.book-card__title { margin: 0; font-size: 1.25rem; }
.book-card__sub { margin: 0; color: var(--color-text-muted); }
.book-card__price { margin-top: auto; font-weight: 700; color: var(--color-secondary); }
.book-card[data-status="coming-soon"] .book-card__link { cursor: default; }
.book-card[data-status="coming-soon"]:hover { transform: none; box-shadow: var(--shadow-sm); }

.badge {
  display: inline-block;
  padding: var(--sp-1) var(--sp-3);
  border-radius: var(--radius-pill);
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  align-self: flex-start;
}
.badge--available { background: var(--color-primary); color: var(--color-secondary); }
.badge--soon { background: #E2E6E8; color: var(--color-secondary); }

/* --- Vertrauenstext (3 Spalten) --- */
.trust-grid {
  display: grid;
  gap: var(--sp-6);
  grid-template-columns: 1fr;
}
@media (min-width: 600px) {
  .trust-grid { grid-template-columns: repeat(3, 1fr); }
}
.trust-item {
  background: var(--color-bg-alt);
  padding: var(--sp-6);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}
.trust-item__icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin-bottom: var(--sp-3);
}
.trust-item h3 { margin-bottom: var(--sp-2); font-size: 1.125rem; }
.trust-item p { margin: 0; color: var(--color-text-muted); }

/* --- Detailseite Buch --- */
.book-hero {
  padding-block: var(--sp-12);
  background: linear-gradient(180deg, #FFFFFF 0%, var(--color-bg) 100%);
}
.book-hero__inner {
  display: grid;
  gap: var(--sp-8);
  grid-template-columns: 1fr;
}
@media (min-width: 600px) {
  .book-hero__inner {
    grid-template-columns: minmax(220px, 320px) 1fr;
    align-items: start;
    gap: var(--sp-12);
  }
}
.book-hero__cover {
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  aspect-ratio: 600 / 848;
}
.book-hero__cover img { width: 100%; height: 100%; object-fit: cover; }
.book-hero__meta {
  color: var(--color-text-muted);
  font-size: var(--fs-small);
  margin-bottom: var(--sp-4);
}
.price-block {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--sp-6);
  margin-block: var(--sp-6);
}
.price-block p { margin: 0 0 var(--sp-2); }
.price-block p:last-child { margin-bottom: 0; }
.price-block .price-hint { font-size: var(--fs-small); color: var(--color-text-muted); margin-top: var(--sp-3); }
.price-block strong { color: var(--color-secondary); font-size: 1.25rem; }

.book-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-block: var(--sp-4);
}

/* --- Autor-Box --- */
.author-box {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--sp-6);
}

/* --- FAQ Accordion --- */
.faq details {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--sp-3) var(--sp-4);
  margin-bottom: var(--sp-3);
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-secondary);
  padding: var(--sp-2) 0;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "+";
  display: inline-block;
  width: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}
.faq details[open] summary::before { content: "-"; }
.faq details > p { margin: var(--sp-2) 0 var(--sp-3) 1.5rem; }

/* --- Inhalts-Liste auf Detailseite --- */
.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--sp-2);
}
.toc-list li {
  position: relative;
  padding-left: 1.75rem;
}
.toc-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 0.75rem;
  height: 0.75rem;
  background: var(--color-primary);
  border-radius: 50%;
}

/* --- Formular --- */
.order-form {
  display: grid;
  gap: var(--sp-6);
  max-width: 720px;
}
.order-form fieldset {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--sp-6);
  margin: 0;
  background: var(--color-bg-alt);
}
.order-form legend {
  font-weight: 700;
  color: var(--color-secondary);
  padding: 0 var(--sp-2);
}
.order-form label {
  display: block;
  margin-bottom: var(--sp-4);
  color: var(--color-secondary);
  font-weight: 600;
}
.order-form label:last-child { margin-bottom: 0; }
.order-form input[type="text"],
.order-form input[type="email"],
.order-form input[type="tel"],
.order-form input[type="number"],
.order-form select,
.order-form textarea {
  display: block;
  width: 100%;
  font: inherit;
  color: var(--color-text);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--sp-3);
  margin-top: var(--sp-2);
  min-height: 44px;
}
.order-form textarea { min-height: 120px; resize: vertical; }
.order-form input:focus,
.order-form select:focus,
.order-form textarea:focus {
  border-color: var(--color-primary);
  outline: 3px solid var(--color-primary);
  outline-offset: 0;
}
.order-form .form-hint {
  font-size: var(--fs-small);
  color: var(--color-text-muted);
  margin-top: var(--sp-3);
}
.order-form .checkboxes label {
  font-weight: 400;
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  margin-bottom: var(--sp-3);
}
.order-form .checkboxes input[type="checkbox"] {
  margin-top: 0.25rem;
  flex-shrink: 0;
  width: 1.15rem;
  height: 1.15rem;
}
.order-form .toggle {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-weight: 600;
  margin-bottom: var(--sp-4);
}
.order-form .toggle input { width: 1.15rem; height: 1.15rem; }

/* --- Footer --- */
.site-footer {
  background: var(--color-secondary);
  color: #FFFFFF;
  padding-block: var(--sp-12);
  margin-top: var(--sp-16);
}
.site-footer a { color: #FFFFFF; }
.site-footer a:hover { color: var(--color-primary); }
.site-footer__inner {
  display: grid;
  gap: var(--sp-6);
  grid-template-columns: 1fr;
}
@media (min-width: 600px) {
  .site-footer__inner { grid-template-columns: 1fr auto; align-items: start; }
}
.site-footer p { margin: 0 0 var(--sp-2); }
.site-footer nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
}
.site-footer__copy {
  grid-column: 1 / -1;
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.7);
  margin-top: var(--sp-6);
}

/* --- Legal-Seiten --- */
.legal-warning {
  background: #FFF4E5;
  border: 2px solid #E67E22;
  color: #6E3A00;
  border-radius: var(--radius-md);
  padding: var(--sp-6);
  margin: var(--sp-6) 0 var(--sp-12);
}
.legal-warning strong { color: #6E3A00; }
.legal-content { max-width: 75ch; }
.legal-content h2 {
  margin-top: var(--sp-12);
  padding-top: var(--sp-2);
  border-top: 1px solid var(--color-border);
}
.legal-content h3 { margin-top: var(--sp-8); }
.legal-content ul { margin-bottom: var(--sp-4); }
.placeholder {
  background: #FFF8DC;
  border-radius: var(--radius-sm);
  padding: 0 var(--sp-2);
  font-family: ui-monospace, "Cascadia Code", monospace;
  font-size: 0.95em;
  color: #6E3A00;
}

/* --- Utility --- */
.text-muted { color: var(--color-text-muted); }
.mb-4 { margin-bottom: var(--sp-4); }
.mb-6 { margin-bottom: var(--sp-6); }
.mb-8 { margin-bottom: var(--sp-8); }
.mt-8 { margin-top: var(--sp-8); }
.cta-bar {
  background: var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--sp-8);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  align-items: flex-start;
}
.cta-bar h2 { color: var(--color-secondary); margin: 0; }
@media (min-width: 600px) {
  .cta-bar { flex-direction: row; align-items: center; justify-content: space-between; }
}

.notify-form {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--sp-6);
  display: grid;
  gap: var(--sp-4);
  max-width: 520px;
}
.notify-form label { font-weight: 600; color: var(--color-secondary); }
.notify-form input[type="email"] {
  display: block;
  width: 100%;
  padding: var(--sp-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font: inherit;
  margin-top: var(--sp-2);
  min-height: 44px;
}