/* Sudoku Power - Global Stylesheet */
:root {
  --color-primary: #f7861a;
  --color-primary-hover: #e0720d;
  --color-blue: #4a93dd;
  --color-green: #3a9d5d;
  --color-yellow: #f4c430;
  
  --color-bg: #fafafa;
  --color-card-bg: #ffffff;
  --color-text: #1d1d1f;
  --color-text-muted: #515154;
  --color-border: #e5e5e7;
  --color-hero-bg: #fdf8f4;
  --color-focus: #4a93dd;
  
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1100px;
  --transition-speed: 0.2s;
  --border-radius: 12px;
}

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

html {
  font-family: var(--font-stack);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

a:focus-visible, button:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.25;
  color: #1d1d1f;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

h3 {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

p {
  font-size: 1.05rem;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
}

/* Accessible prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 5rem 0;
}

/* Header */
.site-header {
  background-color: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0.8rem 0;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
  font-weight: 800;
  font-size: 1.4rem;
}

/* CSS 4-Block-Mini-Grid Logo */
.logo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3px;
  width: 34px;
  height: 34px;
}

.logo-grid span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  border-radius: 4px;
  font-size: 9px;
  font-weight: 800;
  color: #ffffff;
}

.logo-grid .block-1 { background-color: var(--color-primary); }
.logo-grid .block-2 { background-color: var(--color-blue); }
.logo-grid .block-3 { background-color: var(--color-green); }
.logo-grid .block-4 { background-color: var(--color-yellow); color: #1d1d1f; }

/* Navigation */
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--color-text);
}

.nav-links a.active {
  border-bottom-color: var(--color-primary);
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  border-left: 1px solid var(--color-border);
  padding-left: 1.5rem;
}

.lang-btn {
  color: var(--color-text-muted);
  text-decoration: none;
}

.lang-btn.active {
  color: var(--color-primary);
  font-weight: 700;
}

/* Mobile Menu Toggle button */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text);
  cursor: pointer;
  padding: 0.25rem;
}

/* Hero Section */
.hero-section {
  background-color: var(--color-hero-bg);
  padding: 6rem 0;
  border-bottom: 1px solid var(--color-border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

.hero-content h1 {
  font-size: 3.2rem;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero-content p {
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  max-width: 600px;
}

.app-store-badge {
  display: inline-block;
  transition: transform var(--transition-speed) ease;
}

.app-store-badge:hover {
  transform: scale(1.02);
}

.app-store-badge img {
  height: 56px;
  display: block;
}

/* Hero Badge Placeholder when image disabled/missing */
.app-store-badge-placeholder {
  background-color: #000000;
  color: #ffffff;
  padding: 10px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

/* Hero Illustration (Logo Motif large) */
.hero-illustration {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-grid-motif {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  width: 260px;
  height: 260px;
}

.hero-grid-motif div {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 28px;
  font-size: 72px;
  font-weight: 800;
  color: #ffffff;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
}

.hero-grid-motif .block-1 { background-color: var(--color-primary); }
.hero-grid-motif .block-2 { background-color: var(--color-blue); }
.hero-grid-motif .block-3 { background-color: var(--color-green); }
.hero-grid-motif .block-4 { background-color: var(--color-yellow); color: #1d1d1f; }

/* USP Section - Strategy Guide */
.usp-section {
  background-color: var(--color-card-bg);
}

.strategy-showcase {
  margin-top: 3.5rem;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: center;
}

.strategy-intro h3 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  color: var(--color-primary);
}

.strategy-intro p {
  font-size: 1.15rem;
  margin-bottom: 2rem;
}

.strategy-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.strategy-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.strategy-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.strategy-card h4 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.strategy-card h4::before {
  content: "➔";
  color: var(--color-primary);
}

.strategy-card p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* Features Grid */
.features-section {
  background-color: var(--color-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3.5rem;
}

.feature-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 2rem;
  transition: transform var(--transition-speed) ease;
}

.feature-card:hover {
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 1.2rem;
  line-height: 1;
  display: inline-block;
}

/* Screenshots Section */
.screenshots-section {
  background-color: var(--color-card-bg);
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2.5rem;
  margin-top: 3.5rem;
  justify-content: center;
}

.screenshot-slot {
  background-color: var(--color-bg);
  border: 12px solid #1d1d1f; /* phone style border */
  border-radius: 36px;
  aspect-ratio: 9 / 19.5; /* iOS phone screen aspect ratio */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
  text-align: center;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
}

.screenshot-placeholder-info {
  display: none; /* echte Screenshots vorhanden -> Platzhalter-Overlay ausblenden */
}

.screenshot-placeholder-info span.icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 1rem;
}

.screenshot-placeholder-info h4 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.screenshot-placeholder-info p {
  font-size: 0.8rem;
  margin-bottom: 0;
}

.screenshot-slot img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  background-color: #fafafa;
}

/* Subpages - Legal / Privacy / Support Layout */
.page-container {
  padding: 4rem 0 6rem 0;
  max-width: 800px;
  margin: 0 auto;
}

.page-container h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: 0.5rem;
}

.last-updated {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  font-style: italic;
}

.legal-section {
  margin-bottom: 2.5rem;
}

.legal-section h2 {
  font-size: 1.4rem;
  text-align: left;
  margin-bottom: 1rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.25rem;
}

.legal-section p, .legal-section li {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
}

.legal-section ul {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

/* Translator Disclaimer Box */
.translation-disclaimer {
  background-color: #ebf4fc;
  border-left: 4px solid var(--color-blue);
  padding: 1rem 1.5rem;
  margin-bottom: 2rem;
  border-radius: 0 8px 8px 0;
}

.translation-disclaimer p {
  margin-bottom: 0;
  font-size: 0.95rem;
  font-style: italic;
  color: #1d1d1f;
}

/* Support Subpage FAQ styles */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
}

.faq-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 1.5rem 2rem;
}

.faq-item h3 {
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.faq-item p {
  margin-bottom: 0;
}

.support-contact-box {
  background-color: var(--color-hero-bg);
  border: 1px solid var(--color-primary);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin-top: 3rem;
  text-align: center;
}

.support-contact-box h2 {
  text-align: center;
  margin-bottom: 1rem;
  color: var(--color-primary);
}

.support-contact-box a.contact-email {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  display: inline-block;
  margin-top: 0.5rem;
  border-bottom: 2px solid var(--color-primary);
}

.support-contact-box a.contact-email:hover {
  color: var(--color-primary);
}

/* Footer */
.site-footer {
  background-color: #1d1d1f;
  color: #ffffff;
  padding: 4rem 0 2rem 0;
  margin-top: auto;
  border-top: 1px solid #333333;
}

.footer-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.footer-brand h3 {
  color: #ffffff;
  font-size: 1.4rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-brand p {
  color: #a1a1a6;
  font-size: 0.9rem;
  max-width: 300px;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-end;
}

.footer-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.footer-links a {
  color: #a1a1a6;
  font-size: 0.9rem;
  transition: color var(--transition-speed) ease;
}

.footer-links a:hover {
  color: #ffffff;
}

.copyright {
  grid-column: 1 / -1;
  text-align: center;
  border-top: 1px solid #333333;
  padding-top: 2rem;
  margin-top: 2rem;
  font-size: 0.85rem;
  color: #86868b;
}

/* Mobile responsive adjustments */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.6rem;
  }

  section {
    padding: 3.5rem 0;
  }

  .site-header {
    padding: 0.6rem 0;
  }

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

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem;
    gap: 1rem;
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
  }

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

  .lang-switch {
    border-left: none;
    border-top: 1px solid var(--color-border);
    padding-left: 0;
    padding-top: 1rem;
    width: 100%;
    justify-content: center;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .hero-content h1 {
    font-size: 2.2rem;
  }

  .hero-content p {
    margin: 0 auto 2rem auto;
  }

  .hero-grid-motif {
    width: 180px;
    height: 180px;
    gap: 12px;
  }
  
  .hero-grid-motif div {
    font-size: 48px;
    border-radius: 18px;
  }

  .strategy-showcase {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .strategy-intro h3 {
    text-align: center;
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }

  .footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .footer-nav {
    align-items: center;
  }

  .footer-links {
    justify-content: center;
    gap: 1rem;
  }
}