/* ==========================================================================
   CLOUDIOU.FR — Modern European Sovereign Tech Design System
   Vanilla CSS with CSS Variables, Dark/Light theme, WCAG 2.2 AA compliant
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@500;600;700;800&display=swap');

:root {
  /* Color Palette - European Sovereign Tech */
  --primary-900: hsl(222, 50%, 8%);
  --primary-800: hsl(222, 45%, 13%);
  --primary-700: hsl(220, 45%, 19%);
  --primary-600: hsl(215, 80%, 48%);
  --primary-500: hsl(210, 90%, 56%);
  
  --accent-cyan: hsl(190, 95%, 48%);
  --accent-green: hsl(152, 75%, 42%);
  --accent-amber: hsl(38, 95%, 52%);
  
  --bg-main: #0B111E;
  --bg-surface: #121B2C;
  --bg-card: #182438;
  --bg-card-hover: #1F2E47;
  --bg-glass: rgba(18, 27, 44, 0.75);
  
  --text-primary: #F0F4FA;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-accent: #38BDF8;
  
  --border-color: rgba(255, 255, 255, 0.1);
  --border-glow: rgba(56, 189, 248, 0.3);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(56, 189, 248, 0.2);
  
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', 'Inter', system-ui, sans-serif;
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Alternate Override */
[data-theme="light"] {
  --bg-main: #F8FAFC;
  --bg-surface: #FFFFFF;
  --bg-card: #F1F5F9;
  --bg-card-hover: #E2E8F0;
  --bg-glass: rgba(255, 255, 255, 0.85);
  
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --text-accent: #0284C7;
  
  --border-color: rgba(15, 23, 42, 0.1);
  --border-glow: rgba(2, 132, 199, 0.3);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.25rem; }

p { margin-bottom: 1rem; color: var(--text-secondary); }
p.lead { font-size: 1.2rem; font-weight: 400; color: var(--text-secondary); }

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: #7DD3FC; text-decoration: underline; }

/* Accessible Focus States */
:focus-visible {
  outline: 3px solid var(--accent-cyan);
  outline-offset: 3px;
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.section {
  padding: 5rem 0;
  position: relative;
}

.section-sm { padding: 3rem 0; }
.section-lg { padding: 7rem 0; }

.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-smooth);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

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

.logo img {
  height: 44px;
  width: auto;
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}
.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  text-decoration: none;
}

/* Language Selector Dropdown */
.lang-selector {
  position: relative;
  display: inline-block;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.lang-btn:hover {
  border-color: var(--accent-cyan);
}

.lang-dropdown {
  position: absolute;
  top: 110%;
  right: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  min-width: 160px;
  padding: 0.5rem;
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  z-index: 1010;
}
.lang-selector:hover .lang-dropdown,
.lang-selector:focus-within .lang-dropdown {
  display: flex;
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.75rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
}
.lang-option:hover, .lang-option.active {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  text-decoration: none;
}

/* Hero Section */
.hero {
  padding-top: 160px;
  padding-bottom: 90px;
  background: radial-gradient(circle at 50% 20%, rgba(14, 165, 233, 0.15) 0%, transparent 60%);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-full);
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-title {
  margin-bottom: 1.25rem;
}
.hero-title span {
  background: linear-gradient(135deg, #38BDF8 0%, #818CF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
  align-items: center;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-muted);
}
.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  text-decoration: none !important;
}

.btn-primary {
  background: linear-gradient(135deg, #0284C7 0%, #2563EB 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
  color: #FFFFFF;
}

.btn-secondary {
  background: var(--bg-surface);
  border-color: var(--border-color);
  color: var(--text-primary);
}
.btn-secondary:hover {
  border-color: var(--accent-cyan);
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent-green) 0%, hsl(160, 80%, 36%) 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
  color: #FFFFFF;
}

/* Cards & Components */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: all var(--transition-smooth);
}
.card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

/* Comparison Table (GAFAM vs Nextcloud) */
.comparison-table-wrapper {
  overflow-x: auto;
  margin-top: 2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 650px;
}

.comparison-table th, .comparison-table td {
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  background: var(--bg-card);
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--text-primary);
}

.comparison-table tr:last-child td { border-bottom: none; }

.badge-danger {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: #F87171;
  background: rgba(239, 68, 68, 0.12);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
}

.badge-success {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: #4ADE80;
  background: rgba(34, 197, 94, 0.12);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
}

/* Pricing Grid */
.pricing-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.pricing-card.popular {
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}
.pricing-popular-tag {
  position: absolute;
  top: -14px;
  right: 20px;
  background: var(--accent-cyan);
  color: #041428;
  font-weight: 700;
  font-size: 0.75rem;
  padding: 0.2rem 0.8rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

.pricing-price {
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 1rem 0;
}
.pricing-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  margin: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.pricing-features li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
}
.pricing-features li::before {
  content: "✓";
  color: var(--accent-green);
  font-weight: bold;
}

/* FAQ Accordion */
.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 1.25rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-answer {
  padding: 0 1.5rem 1.25rem 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.faq-answer-summary {
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
  border-left: 3px solid var(--accent-cyan);
}

/* Lead Magnet Form & Banner */
.lead-banner {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.15) 0%, rgba(37, 99, 235, 0.15) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.lead-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 500px;
  margin: 1.5rem auto 0 auto;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  text-align: left;
}

.form-control {
  width: 100%;
  padding: 0.85rem 1.1rem;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}
.form-control:focus {
  border-color: var(--accent-cyan);
  outline: none;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.25);
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: left;
}
.form-checkbox input { margin-top: 0.2rem; }

/* Honeypot field - hidden from real humans */
.hp-field {
  display: none !important;
  visibility: hidden !important;
}

/* Footer */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p { margin-top: 1rem; font-size: 0.9rem; }

.footer-title {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 1.2rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 1rem;
}

/* Responsive Queries */
@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-actions { justify-content: center; }
  .hero-trust { justify-content: center; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 640px) {
  .nav-menu { display: none; } /* Mobile nav toggle */
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 3.5rem 0; }
}

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