/* =========================================================================
   Gemeinschaftspraxis für Zahnmedizin – Nieheim
   Design-System / globales Stylesheet
   Aufbau:  1) Design-Tokens  2) Reset/Basis  3) Layout  4) Komponenten
            5) Seitenspezifisches  6) Utilities  7) Responsiv/Media
   Barrierefreiheit: WCAG 2.1 AA – Kontrast, Fokus, Tastatur, Motion
   ========================================================================= */

/* ---------- 1) Design-Tokens ------------------------------------------- */
:root {
  /* Farben – auf Kontrast AA geprüft (Text ≥ 4.5:1, große Flächen ≥ 3:1) */
  --color-bg: #ffffff;
  --color-bg-muted: #f2f6f6;      /* Abschnittshintergrund, auch Kasten-Hintergrund */
  --color-bg-brand: #0d3b5c;      /* Markenfläche, dunkel */
  --color-bg-brand-deep: #0a2e47;

  --color-text: #16302f;          /* Fließtext auf hell  ~13:1 */
  --color-text-muted: #455756;    /* sekundär            ~7:1  */
  --color-text-invert: #ffffff;

  --color-primary: #0b3a5c;       /* Links/Buttons auf hell ~6:1 */
  --color-primary-hover: #092e48;
  --color-accent: #b4531a;        /* warmer Akzent (Notdienst) ~4.8:1 */
  --color-accent-blue: #4d7291;   /* gedecktes Blau, Zweitfarbe für Akzente */

  --color-border: #d3dedd;
  --color-border-strong: #9fb3b2;
  --color-field-border: #6b8281;   /* Eingabefelder, ~4:1 auf Weiß (UI-Kontrast ≥ 3:1) */

  --color-focus: #14343a;         /* Fokusring auf hell */
  --color-focus-invert: #ffffff;  /* Fokusring auf Markenfläche */

  --color-success-bg: #e6f4ea;
  --color-success-text: #1c5230;

  /* Typografie – Systemschrift, keine externen Fonts (DSGVO, Performance) */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
               Arial, "Noto Sans", sans-serif;
  --fs-300: 0.9375rem;  /* 15 */
  --fs-400: 1rem;       /* 16 – Basis */
  --fs-500: 1.125rem;   /* 18 */
  --fs-600: 1.375rem;   /* 22 */
  --fs-700: 1.75rem;    /* 28 */
  --fs-800: 2.25rem;    /* 36 */
  --fs-900: clamp(2.25rem, 1.6rem + 2.8vw, 3.25rem);
  --lh-tight: 1.2;
  --lh-normal: 1.65;

  /* Abstände */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  /* Maße */
  --container: 72rem;      /* 1152px */
  --container-narrow: 46rem;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(11, 44, 44, 0.08),
               0 2px 8px rgba(11, 44, 44, 0.06);
  --shadow-md: 0 4px 12px rgba(11, 44, 44, 0.10),
               0 12px 32px rgba(11, 44, 44, 0.10);
  --transition: 150ms ease;
}

/* ---------- 2) Reset / Basis ----------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-400);
  line-height: var(--lh-normal);
  color: var(--color-text);
  background: var(--color-bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  line-height: var(--lh-tight);
  color: var(--color-text);
  margin: 0 0 var(--space-4);
  font-weight: 700;
  text-wrap: balance;
  overflow-wrap: break-word;   /* lange Wörter (z. B. "Datenschutzerklärung") laufen nicht aus dem Bild */
  hyphens: auto;
}
h1 { font-size: var(--fs-900); }
h2 { font-size: var(--fs-800); margin-top: var(--space-2); }
h3 { font-size: var(--fs-600); }
h4 { font-size: var(--fs-500); }

p { margin: 0 0 var(--space-4); max-width: 65ch; }
#dvt p, #intraoralscan p, #gesichtsscan p, #zahnersatz p, #schienen p { max-width: none; }

a {
  color: var(--color-primary);
  text-underline-offset: 0.15em;
}
a:hover { color: var(--color-primary-hover); }

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

ul, ol { padding-left: 1.25rem; }
li { margin-bottom: var(--space-2); }

/* Sichtbarer, kräftiger Fokus für Tastaturnutzung */
:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 3px;
}
/* Fokus auf dunklen Markenflächen */
.section--brand :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--color-focus-invert);
}

/* Reduzierte Bewegung respektieren */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- 3) Layout ---------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
.container--narrow { max-width: var(--container-narrow); }

.section {
  padding-block: var(--space-8);
}
.section--muted { background: var(--color-bg-muted); }
.section--brand {
  background: var(--color-bg-brand);
  color: var(--color-text-invert);
}
.section--brand h1,
.section--brand h2,
.section--brand h3 { color: var(--color-text-invert); }
.section--brand a { color: #cde0ee; }
.section--brand a:hover { color: #ffffff; }
.section--brand a.btn--on-brand,
.section--brand a.btn--on-brand:hover { color: var(--color-bg-brand-deep); }

.stack > * + * { margin-top: var(--space-4); }
.stack-lg > * + * { margin-top: var(--space-6); }

/* Kieferorthopädie: Leerzeile zwischen Einleitungspunkt und eingerückter Liste */
#kieferorthopaedie li > ul { margin-top: var(--space-5); }

.grid {
  display: grid;
  gap: var(--space-5);
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--auto {
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}

/* ---------- Skip-Link -------------------------------------------------- */
.skip-link {
  position: absolute;
  left: var(--space-3);
  top: var(--space-3);
  z-index: 1000;
  padding: var(--space-3) var(--space-4);
  background: var(--color-text);
  color: var(--color-text-invert);
  border-radius: var(--radius);
  transform: translateY(-150%);
  transition: transform var(--transition);
}
.skip-link:focus {
  transform: translateY(0);
  color: var(--color-text-invert);
}

/* ---------- 4) Komponenten -------------------------------------------- */

/* Sprungziele (z. B. /labor.html#schienen) nicht unter der fixierten Kopfzeile verstecken */
[id] { scroll-margin-top: 6rem; }

/* Kopfzeile / Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(6px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 4.25rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  line-height: 1.15;
}
.brand:hover { color: var(--color-text); }
.brand__name { font-size: var(--fs-400); }
.brand__sub {
  display: block;
  font-weight: 500;
  font-size: var(--fs-300);
  color: var(--color-text-muted);
}

/* Navigationsliste */
.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font: inherit;
  font-weight: 600;
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  cursor: pointer;
}
.primary-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}
.primary-nav a {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;   /* bewusst 14 px, damit die Navigation in einer Zeile bleibt */
}
.primary-nav a:hover { background: var(--color-bg-muted); }
.primary-nav a[aria-current="page"] {
  color: var(--color-primary);
  box-shadow: inset 0 -3px 0 var(--color-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.75rem 1.25rem;
  font: inherit;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition);
}
.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:hover { background: var(--color-primary-hover); color: #fff; }
.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: currentColor;
}
.btn--ghost:hover { background: var(--color-bg-muted); }
.btn--on-brand {
  background: #fff;
  color: var(--color-bg-brand-deep);
  border-color: var(--color-bg-brand-deep);
}
.btn--on-brand:hover { background: #e9f0f5; color: var(--color-bg-brand-deep); }
.btn--accent {
  background: var(--color-accent);
  color: #fff;
}
.btn--accent:hover { background: #97430f; color: #fff; }

/* Karten */
.card {
  background: var(--color-bg-muted);
  border: 1px solid var(--color-border);
  border-top: 2px solid var(--color-accent-blue);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}
.card h2, .card h3 { margin-bottom: var(--space-2); }
.card h2 { font-size: var(--fs-600); margin-top: 0; }
.card p:last-child { margin-bottom: 0; }
.card--link { transition: box-shadow var(--transition), transform var(--transition); }
.card--link:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card--link a::after {
  content: "";
  position: absolute;
  inset: 0;
}
.card--link { position: relative; }

/* Bild-Platzhalter */
.img-placeholder {
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
  align-content: center;
  gap: var(--space-2);
  background: var(--color-bg-muted);
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  color: var(--color-text-muted);
  text-align: center;
}
.img-placeholder__icon { font-size: var(--fs-800); line-height: 1; }
.img-placeholder p { margin: 0; font-weight: 600; }
.img-placeholder--sm {
  aspect-ratio: 1 / 1;
  padding: var(--space-3);
  margin-bottom: var(--space-4);
  gap: var(--space-1);
}
.img-placeholder--sm .img-placeholder__icon { font-size: var(--fs-600); }
.img-placeholder--sm p { font-size: var(--fs-300); font-weight: 500; }
.img-placeholder__hint { font-size: var(--fs-300); font-weight: 400 !important; max-width: 32ch; }
.img-placeholder--sm .img-placeholder__hint { font-size: 0.8125rem; }
.img-placeholder--fill { aspect-ratio: auto; height: 100%; min-height: 15rem; }

/* Wechselnde Bild-Text-Abschnitte (Praxis, Labor) */
.media-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-6);
  align-items: stretch;
}
.media-row--reverse .media-row__media { order: 2; }

/* Auf einen Blick (Startseite) */
.section--tight { padding-block: var(--space-6); }
.stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-5);
  text-align: center;
}
.stat { margin: 0; padding-inline: var(--space-3); }
.stat + .stat { border-left: 1px solid var(--color-border); }
.stat__value {
  display: block;
  font-size: var(--fs-700);
  font-weight: 700;
  line-height: var(--lh-tight);
  color: var(--color-primary);
  overflow-wrap: break-word;
  hyphens: auto;
}
.stat__label {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--fs-300);
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* Sanftes Einblenden beim Scrollen (nur wenn Bewegung erlaubt ist, siehe main.js) */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* Feste Termin-Leiste (nur Handy) */
.book-bar { display: none; }

/* Team-Karten: Der Name reserviert bei schmalen Karten Platz für zwei Zeilen, damit
   "Behandlungsschwerpunkte" bei allen Karten auf gleicher Höhe beginnt. */
.team-card__name { font-size: 1.2rem; min-height: 2.9rem; }
@media (min-width: 75rem) {
  .team-card__name { min-height: 0; }
}
.tag.team-card__tag { display: block; }

/* Hero */
.hero {
  padding-block: var(--space-9) var(--space-8);
  background:
    radial-gradient(60rem 40rem at 85% -10%, #e3ecf2 0%, rgba(227,236,242,0) 60%),
    var(--color-bg);
}
.hero__lead {
  font-size: var(--fs-500);
  color: var(--color-text-muted);
  max-width: 42rem;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.center .hero__actions { justify-content: center; }

/* Info-Leiste (Öffnungszeiten / Kontakt) */
.factbar {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}
.factbar dt {
  font-weight: 700;
  color: var(--color-text);
}
.factbar dd { margin: 0; color: var(--color-text-muted); }
.hours-table {
  border-collapse: collapse;
  width: 100%;
  max-width: 24rem;
}
.hours-table th,
.hours-table td {
  text-align: left;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
}
.hours-table th { font-weight: 600; padding-left: 0; }
.hours-table caption {
  text-align: left;
  font-weight: 700;
  margin-bottom: var(--space-3);
}

/* Seitentitel-Block */
.page-head {
  padding-block: var(--space-8) var(--space-6);
  background: var(--color-bg-muted);
  border-bottom: 1px solid var(--color-border);
}
.page-head .container {
  max-width: var(--container-narrow);
  text-align: center;
}
.page-head .lead { margin-inline: auto; }
.breadcrumb {
  font-size: var(--fs-300);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb [aria-current="page"] { color: var(--color-text); font-weight: 600; }

/* Hinweiskästen */
.callout {
  border-left: 4px solid var(--color-primary);
  background: var(--color-bg-muted);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius);
}
.callout--accent { border-left-color: var(--color-accent); }

/* ---------- Formulare ----------------------------------------------- */
.form {
  display: grid;
  gap: var(--space-5);
}
.form__row {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(2, 1fr);
}
.field { display: grid; gap: var(--space-2); }
.field > label {
  font-weight: 600;
}
.field .req { color: var(--color-accent); }
.field .hint {
  font-size: var(--fs-300);
  color: var(--color-text-muted);
}
.field input,
.field textarea {
  font: inherit;
  color: var(--color-text);
  background: #fff;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--color-field-border);
  border-radius: var(--radius);
  width: 100%;
}
.field textarea { min-height: 9rem; resize: vertical; }
.field input:focus-visible,
.field textarea:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 1px;
  border-color: var(--color-primary);
}
.field input:user-invalid,
.field textarea:user-invalid {
  border-color: var(--color-accent);
}

/* Einwilligungs-Checkbox */
.consent {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: start;
}
.consent input { margin-top: 0.2rem; width: 1.5rem; height: 1.5rem; }

/* Honeypot – für Menschen unsichtbar, kein display:none (Bot-Erkennung) */
.hp-field {
  position: absolute !important;
  left: -9999px !important;
  width: 1px; height: 1px;
  overflow: hidden;
}

.form__status {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius);
  background: var(--color-success-bg);
  color: var(--color-success-text);
  border: 1px solid #b7dcc4;
}

/* ---------- 5) Footer ------------------------------------------------- */
.site-footer {
  background: var(--color-bg-brand-deep);
  color: #d7e1e8;
  padding-block: var(--space-8) var(--space-6);
}
.site-footer h2 {
  color: #fff;
  font-size: var(--fs-500);
  margin-bottom: var(--space-3);
}
.site-footer a { color: #cde0ee; text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: var(--space-2); }
.footer-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
}
.footer-bottom {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid rgba(255,255,255,0.15);
  font-size: var(--fs-300);
  color: #b6c6d2;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-5);
  justify-content: space-between;
}

/* Klickflächen in Footer und Brotkrumen mindestens 44 px hoch (Layout bleibt unverändert) */
.site-footer li a,
.footer-bottom a,
.breadcrumb a {
  display: inline-block;
  padding-block: 0.75rem;
  margin-block: -0.75rem;
}
.footer-bottom a { padding-inline: 0.25rem; margin-inline: -0.25rem; }

/* ---------- 6) Utilities ------------------------------------------- */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.text-muted { color: var(--color-text-muted); }
.lead { font-size: var(--fs-500); color: var(--color-text-muted); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.center { text-align: center; }
.center p { margin-inline: auto; }
.tag {
  display: inline-block;
  font-size: var(--fs-300);
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

/* ---------- 7) Responsiv ------------------------------------------- */
@media (max-width: 60rem) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: var(--space-6); }
  .stat:nth-child(odd) { border-left: 0; }
}

/* Mobiles Menü: greift breiter als der übrige Responsiv-Umbruch, damit die
   Hauptnavigation (9 Punkte) nie zweizeilig umbricht, bevor sie ins
   Menü wechselt. */
@media (max-width: 72rem) {
  .nav-toggle { display: inline-flex; }

  .primary-nav {
    display: none;
    position: absolute;
    left: 0; right: 0;
    top: 100%;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: var(--space-4) var(--space-5);
  }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: var(--space-1); }
  .primary-nav a { padding: var(--space-3); font-size: var(--fs-400); }
  .primary-nav a[aria-current="page"] { box-shadow: inset 3px 0 0 var(--color-primary); }

  .site-header__inner { position: relative; }
}

@media (max-width: 48rem) {
  .stat__value { font-size: var(--fs-600); }
  .media-row { grid-template-columns: minmax(0, 1fr); gap: var(--space-4); }
  .media-row--reverse .media-row__media { order: 0; }
  .img-placeholder--fill { aspect-ratio: 4 / 3; height: auto; min-height: 0; }
  .book-bar {
    display: block;
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 90;
    padding: var(--space-3) var(--space-4) calc(var(--space-3) + env(safe-area-inset-bottom));
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: saturate(180%) blur(8px);
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -4px 16px rgba(11, 44, 44, 0.08);
  }
  .book-bar .btn { width: 100%; justify-content: center; }
  .book-bar + .site-footer { padding-bottom: calc(var(--space-6) + 5rem); }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .section { padding-block: var(--space-7); }
  .hero { padding-block: var(--space-8) var(--space-7); }
}

@media (max-width: 30rem) {
  .container { padding-inline: var(--space-4); }
  .hero__actions .btn { width: 100%; justify-content: center; }
}

/* ---------- Druck ------------------------------------------------- */
@media print {
  .site-header, .site-footer, .hero__actions, .nav-toggle, .book-bar { display: none; }
  .reveal { opacity: 1 !important; transform: none !important; }
  a { color: #000; text-decoration: underline; }
  body { color: #000; }
}