/* ============================================================
   aquaristik-zentrum.com — Main Stylesheet
   ============================================================ */

:root {
  --color-primary: #00BCD4;
  --color-primary-dark: #0097A7;
  --color-primary-light: #B2EBF2;
  --color-accent: #FF6F00;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7fa;
  --color-bg-dark: #1a1a2e;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-on-dark: #e0e0e0;
  --color-border: #e0e0e0;
  --color-card-bg: #ffffff;
  --color-footer-bg: #1a1a2e;
  --color-footer-text: #b0b0b0;
  --color-cookie-bg: rgba(0, 0, 0, 0.85);
  --font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1200px;
  --border-radius: 12px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --transition: 0.3s ease;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f0f1a;
    --color-bg-alt: #1a1a2e;
    --color-text: #e0e0e0;
    --color-text-light: #aaaaaa;
    --color-border: #2a2a3e;
    --color-card-bg: #1a1a2e;
    --color-footer-bg: #0a0a14;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

/* ============================================================
   AD SENSE PLACEHOLDER
   ============================================================ */
.adsense-placeholder {
  background: var(--color-bg-alt);
  border: 2px dashed var(--color-border);
  border-radius: var(--border-radius);
  padding: 2rem;
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.85rem;
  margin: 2rem 0;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============================================================
   HEADER / NAVIGATION
   ============================================================ */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(255,255,255,0.95);
}

@media (prefers-color-scheme: dark) {
  .site-header {
    background: rgba(15,15,26,0.95);
  }
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  height: 70px;
}

.logo a {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.5px;
}

.logo a span {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
}

.nav-links a {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: background var(--transition), color var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--color-primary);
  color: #ffffff;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text);
  padding: 0.5rem;
}

/* ============================================================
   MAIN CONTENT
   ============================================================ */
main {
  flex: 1;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: #ffffff;
  padding: 4rem 1.5rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -1px;
}

.hero p {
  font-size: 1.2rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Section Title */
.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 2.5rem 0 1.5rem;
  color: var(--color-text);
  position: relative;
  padding-bottom: 0.5rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
}

/* ============================================================
   BLOG CARDS
   ============================================================ */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
  padding: 2rem 0;
}

.blog-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

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

.card-image {
  width: 100%;
  height: 200px;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 0.9rem;
  overflow: hidden;
}

.card-image svg {
  width: 60px;
  height: 60px;
  opacity: 0.3;
}

.card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.card-tag {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

@media (prefers-color-scheme: dark) {
  .card-tag {
    background: rgba(0, 188, 212, 0.2);
    color: var(--color-primary);
  }
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

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

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

.card-excerpt {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.6;
  flex: 1;
  margin-bottom: 1rem;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.85rem;
}

.read-more {
  font-weight: 600;
  color: var(--color-primary);
}

.read-more:hover {
  color: var(--color-primary-dark);
}

/* ============================================================
   ARTICLE PAGE
   ============================================================ */
.article-header {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2rem;
}

.article-header .card-meta {
  font-size: 0.95rem;
}

.article-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  margin: 1rem 0;
  letter-spacing: -0.5px;
}

.article-content {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 2rem 0 1rem;
  color: var(--color-text);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem;
}

.article-content p {
  margin-bottom: 1.2rem;
  font-size: 1.05rem;
  line-height: 1.8;
}

.article-content ul, .article-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

.article-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: var(--color-bg-alt);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  font-style: italic;
}

.article-image-full {
  width: 100%;
  height: 350px;
  background: var(--color-bg-alt);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  margin: 2rem 0;
}

.affiliate-box {
  background: var(--color-bg-alt);
  border: 2px solid var(--color-primary-light);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin: 2rem 0;
}

.affiliate-box h4 {
  color: var(--color-primary-dark);
  margin-bottom: 0.75rem;
}

.affiliate-box .btn {
  display: inline-block;
  background: var(--color-primary);
  color: #ffffff;
  padding: 0.7rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  margin-top: 0.75rem;
  transition: background var(--transition);
}

.affiliate-box .btn:hover {
  background: var(--color-primary-dark);
  color: #ffffff;
}

/* ============================================================
   ABOUT / IMPRESSUM PAGES
   ============================================================ */
.page-content {
  max-width: 780px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.page-content h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  letter-spacing: -0.5px;
}

.page-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2rem 0 1rem;
}

.page-content p {
  margin-bottom: 1.2rem;
  line-height: 1.8;
  font-size: 1.05rem;
}

.page-content address {
  font-style: normal;
  line-height: 2;
  margin: 1.5rem 0;
  padding: 1.5rem;
  background: var(--color-bg-alt);
  border-radius: var(--border-radius);
}

/* ============================================================
   COOKIE BANNER
   ============================================================ */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-cookie-bg);
  color: #ffffff;
  padding: 1.5rem;
  z-index: 999;
  display: none;
  backdrop-filter: blur(8px);
}

.cookie-banner.show {
  display: block;
}

.cookie-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.cookie-inner p {
  font-size: 0.9rem;
  line-height: 1.5;
  flex: 1;
  min-width: 250px;
}

.cookie-inner a {
  color: var(--color-primary-light);
  text-decoration: underline;
}

.cookie-btn {
  background: var(--color-primary);
  color: #ffffff;
  border: none;
  padding: 0.7rem 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  transition: background var(--transition);
}

.cookie-btn:hover {
  background: var(--color-primary-dark);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 3rem 1.5rem 1.5rem;
  margin-top: 4rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.footer-col p {
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.5rem;
}

.footer-col ul a {
  color: var(--color-footer-text);
  font-size: 0.9rem;
}

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

.footer-bottom {
  max-width: var(--max-width);
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  font-size: 0.85rem;
}

.footer-bottom .affiliate-hinweis {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  opacity: 0.7;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 1rem;
    gap: 0.5rem;
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 0.75rem 1rem;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: 1rem;
  }

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

  .article-header h1 {
    font-size: 1.6rem;
  }

  .article-content h2 {
    font-size: 1.3rem;
  }

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

  .cookie-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 0 1rem;
  }

  .hero {
    padding: 3rem 1rem;
  }

  .card-body {
    padding: 1.25rem;
  }

  .page-content {
    padding: 2rem 1rem;
  }
}