/* ============================================
   Havelberg-Apartments.de – Design System
   Phase 1: Fundament
   Colors from Havelberger Stadtwappen + Gold accent
   No Google Fonts – system font stack
   ============================================ */

:root {
  /* Primary palette */
  --color-bg: #ffffff;
  --color-bg-soft: #f7f9fb;
  --color-bg-muted: #eef2f5;
  --color-text: #1b1918;
  --color-text-muted: #4a4644;
  --color-text-light: #6b6562;

  --color-blue: #0090d4;
  --color-blue-dark: #0077b0;
  --color-blue-light: #e6f5fc;

  --color-red: #e30016;
  --color-red-dark: #c10012;

  --color-gold: #c9a227;
  --color-gold-light: #f5edcf;

  /* Borders & shadows */
  --border-color: #e2e6ea;
  --shadow-sm: 0 1px 3px rgba(27, 25, 24, 0.06);
  --shadow-md: 0 4px 12px rgba(27, 25, 24, 0.08);
  --shadow-lg: 0 12px 32px rgba(27, 25, 24, 0.12);

  /* Typography – system fonts only */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-serif: Georgia, "Times New Roman", Times, serif;

  /* Spacing scale (approx. golden ratio inspired) */
  --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: 4.5rem;
  --space-9: 7rem;

  /* Layout */
  --max-width: 72rem; /* ~1152px */
  --header-height: 4.5rem;
  --radius: 0.5rem;
  --radius-lg: 0.75rem;

  /* Transitions */
  --transition: 180ms ease;
}

/* Reset & base */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  font-size: 1.0625rem; /* 17px */
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--color-blue);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
  transition: color var(--transition);
}

a:hover,
a:focus-visible {
  color: var(--color-blue-dark);
}

a:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

/* Typography hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  margin-bottom: var(--space-5);
}

h2 {
  font-size: clamp(1.45rem, 3vw, 1.85rem);
  margin-top: var(--space-7);
  margin-bottom: var(--space-4);
}

h3 {
  font-size: clamp(1.2rem, 2.5vw, 1.4rem);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

h4 {
  font-size: 1.1rem;
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
}

p:last-child {
  margin-bottom: 0;
}

ul, ol {
  margin-bottom: var(--space-4);
  padding-left: 1.35em;
}

li + li {
  margin-top: 0.35em;
}

strong {
  font-weight: 600;
}

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

.section {
  padding-block: var(--space-7);
}

.section--soft {
  background-color: var(--color-bg-soft);
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-text);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  z-index: 1000;
  border-radius: var(--radius);
  transition: top var(--transition);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ========== HEADER ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-5);
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.logo:hover {
  color: var(--color-blue);
}

.logo-mark {
  width: 1.75rem;
  height: 1.75rem;
  background: linear-gradient(135deg, var(--color-blue), var(--color-red));
  border-radius: 0.35rem;
  flex-shrink: 0;
}

/* Navigation */
.nav-main {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-main a {
  color: var(--color-text);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  font-weight: 500;
  font-size: 0.95rem;
  transition: background var(--transition), color var(--transition);
}

.nav-main a:hover,
.nav-main a:focus-visible,
.nav-main a[aria-current="page"] {
  background: var(--color-blue-light);
  color: var(--color-blue-dark);
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  color: var(--color-text);
}

.nav-toggle svg {
  width: 1.35rem;
  height: 1.35rem;
  display: block;
}

@media (max-width: 900px) {
  .nav-toggle {
    display: block;
  }

  .nav-main {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-1);
    box-shadow: var(--shadow-md);
  }

  .nav-main.is-open {
    display: flex;
  }

  .nav-main a {
    width: 100%;
    padding: var(--space-3) var(--space-4);
  }
}

/* ========== HERO / MAIN ========== */
main {
  flex: 1;
  padding-bottom: var(--space-7);
}

.hero {
  padding-block: var(--space-8) var(--space-7);
  background: linear-gradient(180deg, var(--color-bg-soft) 0%, var(--color-bg) 100%);
  text-align: center;
}

.hero h1 {
  max-width: 18ch;
  margin-inline: auto;
}

.hero-lead {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  max-width: 42ch;
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform 120ms ease;
  line-height: 1.2;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--color-blue);
  color: #fff;
  border-color: var(--color-blue);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--color-blue-dark);
  border-color: var(--color-blue-dark);
  color: #fff;
}

.btn--secondary {
  background: transparent;
  color: var(--color-blue);
  border-color: var(--color-blue);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  background: var(--color-blue-light);
}

.btn--gold {
  background: var(--color-gold);
  color: #1b1918;
  border-color: var(--color-gold);
}

.btn--gold:hover,
.btn--gold:focus-visible {
  background: #b8911f;
  border-color: #b8911f;
  color: #1b1918;
}

.btn--red {
  background: var(--color-red);
  color: #fff;
  border-color: var(--color-red);
}

.btn--red:hover {
  background: var(--color-red-dark);
  border-color: var(--color-red-dark);
  color: #fff;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}

.card {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-image {
  aspect-ratio: 4 / 3;
  background: var(--color-bg-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 0.9rem;
  overflow: hidden;
  padding: 0;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.card-body {
  padding: var(--space-5);
}

.card-title {
  font-size: 1.2rem;
  margin-top: 0;
  margin-bottom: var(--space-2);
}

.card-title a {
  color: inherit;
  text-decoration: none;
}

.card-title a:hover {
  color: var(--color-blue);
}

/* Breadcrumbs */
.breadcrumbs {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-5);
  padding-top: var(--space-5);
  line-height: 1.4;
}

.breadcrumbs ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.15rem 0.25rem;
  line-height: 1.4;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  line-height: 1.4;
  margin: 0;
  padding: 0;
  vertical-align: middle;
}

.breadcrumbs li:not(:last-child)::after {
  content: "›";
  margin-left: 0.35rem;
  color: var(--color-text-light);
  font-weight: 400;
  line-height: 1;
}

.breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--color-blue);
}

.breadcrumbs [aria-current="page"] {
  color: var(--color-text);
  font-weight: 500;
}

/* Placeholder image boxes */
.placeholder-img {
  background: linear-gradient(135deg, var(--color-bg-muted), var(--color-bg-soft));
  border: 1px dashed var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 0.9rem;
  text-align: center;
  padding: var(--space-4);
}

.placeholder-img--panorama {
  aspect-ratio: 21 / 9;
  width: 100%;
}

.placeholder-img--detail {
  aspect-ratio: 4 / 3;
}

/* Real accommodation images/videos – Desktop & Mobile identisch, 21:9 */
.accommodation-hero {
  position: relative;
  width: 100%;
  aspect-ratio: 21 / 9;
  margin-bottom: var(--space-5);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-muted);
  line-height: 0;
}

.accommodation-hero picture {
  display: block;
  width: 100%;
  height: 100%;
}

.accommodation-hero img,
.accommodation-hero video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  border-radius: var(--radius-lg);
}

/* Über-uns Familienfoto 4:3 */
.about-photo {
  margin: 0 0 var(--space-5);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-muted);
  line-height: 0;
  aspect-ratio: 4 / 3;
  max-width: 42rem;
}

.about-photo picture,
.about-photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  border-radius: var(--radius-lg);
}

/* ========== FOOTER ========== */
.site-footer {
  background: var(--color-text);
  color: #e8e6e4;
  padding-block: var(--space-7) var(--space-5);
  margin-top: auto;
}

.site-footer a {
  color: #c9c5c2;
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: #fff;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

@media (max-width: 800px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 500px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand p {
  font-size: 0.95rem;
  color: #a9a5a2;
  margin-top: var(--space-3);
  max-width: 28ch;
}

.footer-heading {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #fff;
  margin-bottom: var(--space-3);
  margin-top: 0;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li + li {
  margin-top: 0.4rem;
}

/* Social icons */
.social-links {
  display: flex;
  gap: 0.85rem;
  margin-top: var(--space-4);
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  color: #c9c5c2;
  transition: color var(--transition);
}

.social-links a:hover {
  color: #fff;
}

.social-links svg {
  width: 22px;
  height: 22px;
}

.footer-bottom {
  border-top: 1px solid #3a3735;
  padding-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: 0.875rem;
  color: #8a8582;
}

.footer-bottom-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* ========== FORM ELEMENTS ========== */
.form-group {
  margin-bottom: var(--space-4);
}

label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--space-2);
  font-size: 0.95rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px rgba(0, 144, 212, 0.15);
}

textarea {
  min-height: 6rem;
  resize: vertical;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  margin-bottom: var(--space-3);
}

.checkbox-group input {
  margin-top: 0.3rem;
  width: auto;
  flex-shrink: 0;
}

.checkbox-group label {
  margin-bottom: 0;
  font-weight: 400;
  font-size: 0.95rem;
}

/* Feedback form (compact at bottom of pages) */
.feedback-section {
  background: var(--color-bg-soft);
  border-top: 1px solid var(--border-color);
  padding-block: var(--space-6);
}

.feedback-box {
  max-width: 36rem;
  margin-inline: auto;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}

.feedback-box h2 {
  font-size: 1.15rem;
  margin-top: 0;
  margin-bottom: var(--space-3);
}

.feedback-hidden {
  display: none;
}

.feedback-hidden.is-visible {
  display: block;
}

/* Utility */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center {
  text-align: center;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* Lead text under panorama – full content width */
.accommodation-lead {
  font-size: 1.1rem;
  max-width: none;
  margin-bottom: var(--space-5);
}

/* Affiliate notice (optional, smaller) */
.affiliate-notice {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-top: var(--space-3);
}

/* Combined disclaimer for foreign accommodations */
.operator-disclaimer {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  background: var(--color-bg-soft);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-gold);
  margin-block: var(--space-5);
}

/* Print */
@media print {
  .site-header,
  .site-footer,
  .feedback-section,
  .nav-toggle {
    display: none !important;
  }
}