/* ============================================
   BULGARIAN BEACHES - Modern Design System
   ============================================ */

/* CSS Custom Properties (Variables) */
:root {
  /* Colors */
  --color-primary: #0077b6;
  --color-primary-dark: #005a8c;
  --color-primary-light: #00b4d8;
  --color-secondary: #90e0ef;
  --color-accent: #f77f00;
  --color-accent-light: #fcbf49;

  /* Neutrals */
  --color-bg: #f8fbfd;
  --color-bg-alt: #edf6f9;
  --color-white: #ffffff;
  --color-text: #1e3a5f;
  --color-text-light: #5c7a94;
  --color-text-muted: #8fa3b8;
  --color-border: #d8e6ef;
  --color-border-light: #e8f1f6;

  /* Typography */
  --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Layout */
  --max-width: 1200px;
  --header-height: 70px;
}

/* ============================================
   Reset & Base Styles
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-white) 100%);
  min-height: 100vh;
}

/* ============================================
   Header & Navigation
   ============================================ */
.site-header {
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--color-border-light);
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--color-text);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  font-size: 1.75rem;
}

.logo-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.main-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.main-nav a:hover {
  color: var(--color-primary);
  background: var(--color-bg-alt);
}

.main-nav .lang-switch {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
}

.main-nav .lang-switch:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--spacing-sm);
  color: var(--color-text);
}

/* ============================================
   Page Layout
   ============================================ */
#page {
  max-width: var(--max-width);
  margin: 0 auto;
  background: var(--color-white);
  min-height: calc(100vh - var(--header-height));
  box-shadow: var(--shadow-lg);
}

#content {
  padding: var(--spacing-xl) var(--spacing-lg);
}

#content h1 {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 3px solid var(--color-primary);
  position: relative;
}

#content h1::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 80px;
  height: 3px;
  background: var(--color-accent);
}

#content h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
  margin: var(--spacing-xl) 0 var(--spacing-md);
}

#content h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}

#content p {
  margin-bottom: var(--spacing-lg);
  text-align: justify;
}

#content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

/* ============================================
   Breadcrumbs
   ============================================ */
.breadcrumbs {
  font-size: 0.9rem;
  padding: var(--spacing-md) var(--spacing-lg);
  margin: 0 0 var(--spacing-lg);
  background: linear-gradient(90deg, var(--color-bg-alt) 0%, var(--color-white) 100%);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  color: var(--color-text-light);
}

.breadcrumbs a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast);
}

.breadcrumbs a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.breadcrumbs span {
  font-weight: 700;
  color: var(--color-text);
}

/* ============================================
   Links
   ============================================ */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

a:visited {
  color: var(--color-primary);
}

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

/* ============================================
   Hero Section (for home pages)
   ============================================ */
.hero-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  padding: var(--spacing-3xl) var(--spacing-xl);
  margin: calc(-1 * var(--spacing-xl)) calc(-1 * var(--spacing-lg)) var(--spacing-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath fill='%23ffffff' fill-opacity='0.05' d='M0 50 Q 25 30, 50 50 T 100 50 L 100 100 L 0 100 Z'/%3E%3C/svg%3E") repeat-x bottom;
  background-size: 200px 60px;
}

.hero-section h2 {
  color: var(--color-white);
  font-size: 2rem;
  margin: 0 0 var(--spacing-md);
  position: relative;
}

.hero-section p {
  font-size: 1.1rem;
  opacity: 0.95;
  max-width: 700px;
  margin: 0 auto;
  position: relative;
}

/* ============================================
   Stats/Features Section
   ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.stat-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* ============================================
   Gallery Grid (Beach Thumbnails)
   ============================================ */
.gallery {
  list-style: none;
  padding: 0;
  margin: var(--spacing-xl) 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--spacing-lg);
}

.gallery li {
  list-style: none;
}

.gallery li a {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.gallery li a:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.gallery li img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery li a:hover img {
  transform: scale(1.08);
}

.gallery li a br {
  display: none;
}

/* Gallery card text styling */
.gallery li {
  text-align: center;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
}

.gallery li a {
  padding-bottom: var(--spacing-md);
}

/* ============================================
   Content Cards
   ============================================ */
.content-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.content-card h3 {
  margin-top: 0;
  color: var(--color-primary);
}

/* ============================================
   Info Box
   ============================================ */
.info-box {
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-white) 100%);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.info-box.warning {
  border-left-color: var(--color-accent);
  background: linear-gradient(135deg, #fff8f0 0%, var(--color-white) 100%);
}

/* ============================================
   Horizontal Rule
   ============================================ */
hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--color-border) 50%, transparent 100%);
  margin: var(--spacing-xl) 0;
}

/* ============================================
   Photo Navigation
   ============================================ */
.photo-nav {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg);
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.photo-nav a {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.photo-nav a:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
}

.photo-nav .nav-back {
  background: var(--color-text-light);
}

.photo-nav .nav-back:hover {
  background: var(--color-text);
}

/* ============================================
   Footer
   ============================================ */
#footer {
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-lg);
}

.footer-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-xl);
  max-width: var(--max-width);
  margin: 0 auto var(--spacing-xl);
}

.footer-section h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-primary);
}

.footer-section a {
  display: block;
  color: var(--color-text-light);
  text-decoration: none;
  padding: var(--spacing-xs) 0;
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: var(--color-primary);
}

.footer-section p {
  margin: 0;
  color: var(--color-text-light);
  font-size: 0.9rem;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-tagline {
  margin-top: var(--spacing-sm) !important;
  font-style: italic;
}

/* ============================================
   Back to Top Button
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-full);
  font-size: 1.25rem;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  z-index: 1000;
}

.back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.back-to-top.visible {
  display: flex;
}

/* ============================================
   Language Switcher (inline)
   ============================================ */
.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   Photo Descriptions (SEO content)
   ============================================ */
.photo-descriptions {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  border-top: 2px solid var(--color-border);
}

.photo-detail {
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.photo-detail h3 {
  color: var(--color-primary);
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  font-size: 1.2rem;
}

.photo-detail p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-light);
}

.photo-detail p:last-child {
  margin-bottom: 0;
}

/* ============================================
   Location Intro (Gallery pages)
   ============================================ */
.location-intro {
  margin-bottom: var(--spacing-xl);
}

.location-intro h2:first-child {
  margin-top: 0;
}

/* ============================================
   Lists
   ============================================ */
#content ul, #content ol {
  margin: 0 0 var(--spacing-lg) var(--spacing-lg);
  padding-left: var(--spacing-md);
}

#content li {
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   Tables
   ============================================ */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

th, td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  background: var(--color-bg-alt);
  font-weight: 600;
  color: var(--color-text);
}

tr:hover td {
  background: var(--color-bg-alt);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .header-container {
    padding: 0 var(--spacing-md);
  }

  .logo-text {
    font-size: 1rem;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .main-nav a {
    width: 100%;
    text-align: center;
    padding: var(--spacing-md);
  }

  .mobile-menu-toggle {
    display: block;
  }

  #content {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  #content h1 {
    font-size: 1.75rem;
  }

  #content h2 {
    font-size: 1.25rem;
  }

  .gallery {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-md);
  }

  .gallery li img {
    height: 100px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }

  .stat-card {
    padding: var(--spacing-md);
  }

  .stat-icon {
    font-size: 2rem;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .hero-section {
    padding: var(--spacing-xl) var(--spacing-md);
    margin: calc(-1 * var(--spacing-lg)) calc(-1 * var(--spacing-md)) var(--spacing-lg);
  }

  .hero-section h2 {
    font-size: 1.5rem;
  }

  .footer-container {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
  }

  .photo-nav {
    flex-direction: column;
    text-align: center;
  }

  .back-to-top {
    bottom: 16px;
    right: 16px;
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 480px) {
  .logo-icon {
    font-size: 1.5rem;
  }

  .logo-text {
    font-size: 0.9rem;
  }

  .gallery {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .footer-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-section h4 {
    border-bottom: none;
    padding-bottom: 0;
  }

  .footer-section h4::after {
    content: '';
    display: block;
    width: 40px;
    height: 2px;
    background: var(--color-primary);
    margin: var(--spacing-sm) auto 0;
  }
}

/* ============================================
   Print Styles Override
   ============================================ */
@media print {
  .site-header,
  .back-to-top,
  .mobile-menu-toggle {
    display: none !important;
  }

  #page {
    box-shadow: none;
  }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-muted); }
.mb-0 { margin-bottom: 0; }
.mt-0 { margin-top: 0; }
.hidden { display: none; }