/* ============================================
   PIVERT - Main CSS
   Variables, Reset, Base Styles
   ============================================ */

/* Google Fonts — chargées via <link> dans le HTML (non-blocking) */
/* @import supprimé : render-blocking, remplacé par media="print" trick dans chaque page */

/* ============================================
   CSS Custom Properties — thème corporate clair
   ============================================ */
:root {
  /* Marque — vert terrain / énergie, ambre mesuré */
  --green-primary: #14532D;
  --green-light: #166534;
  --green-glow: #15803D;
  --green-pale: #DCFCE7;
  --green-pale-2: #F0FDF4;
  --orange-accent: #C2410C;
  --orange-light: #EA580C;
  --orange-pale: #FFF7ED;
  --blue-grey: #64748B;

  /* Fonds */
  --bg-dark: #F4F7F5;
  --bg-card: #FFFFFF;
  --bg-surface: #FAFCFA;
  --bg-elevated: #FFFFFF;
  --bg-hover: #EEF4F0;

  /* Texte — contraste WCAG renforcé sur fond clair */
  --text-primary: #0F172A;
  --text-secondary: #334155;
  --text-muted: #475569;
  --text-white: #FFFFFF;

  /* Bordures */
  --border-subtle: rgba(20, 83, 45, 0.12);
  --border-card: rgba(15, 23, 42, 0.07);
  --border-active: rgba(20, 83, 45, 0.28);

  /* Ombres */
  --shadow-sm: 0 1px 4px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 24px rgba(15, 23, 42, 0.09);
  --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 4px 24px rgba(20, 83, 45, 0.18);
  --shadow-glow-sm: 0 2px 12px rgba(20, 83, 45, 0.12);
  --shadow-orange: 0 4px 18px rgba(194, 65, 12, 0.14);

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'DM Sans', sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-spring: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Z-index */
  --z-below: -1;
  --z-base: 0;
  --z-raised: 10;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;

  /* Container */
  --container-max: 1280px;
  --container-padding: clamp(1rem, 4vw, 2rem);

  /* Section Spacing */
  --section-padding: clamp(4rem, 8vw, 8rem);
}

/* ============================================
   Modern CSS Reset
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

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

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

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

ul, ol {
  list-style: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
  font-weight: 700;
}

/* ============================================
   Custom Scrollbar
   ============================================ */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-surface);
}

::-webkit-scrollbar-thumb {
  background: rgba(20, 83, 45, 0.35);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--green-primary);
}

/* ============================================
   Selection
   ============================================ */
::selection {
  background: rgba(21, 128, 61, 0.2);
  color: var(--text-primary);
}

/* ============================================
   Skip Link (Accessibilité clavier)
   ============================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-3) var(--space-6);
  background: var(--green-primary);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-sm);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid #fff;
  outline-offset: 2px;
}

/* ============================================
   Focus Styles (Accessibility)
   ============================================ */
:focus-visible {
  outline: 2px solid var(--green-glow);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ============================================
   Container
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ============================================
   Section Base
   ============================================ */
.section {
  padding: var(--section-padding) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--green-glow);
  background: var(--green-pale-2);
  border: 1px solid rgba(20, 83, 45, 0.18);
  padding: 6px var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ============================================
   Gradient Text
   ============================================ */
/* Accents : couleur unie forte (pas de texte transparent = toujours lisible) */
.gradient-text {
  color: var(--green-primary);
  background: none;
  -webkit-text-fill-color: unset;
  -webkit-background-clip: unset;
  background-clip: unset;
}

.gradient-text-green {
  color: #0F4D28;
  background: none;
  -webkit-text-fill-color: unset;
  -webkit-background-clip: unset;
  background-clip: unset;
}

/* Accent orange (pages IRVE) — lisible sur fond clair */
.gradient-text-orange {
  color: #9A3412;
  background: none;
  -webkit-text-fill-color: unset;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  min-height: 44px;
}

.btn::before {
  content: none;
}

.btn-primary {
  background: linear-gradient(160deg, #1a8c4e 0%, var(--green-primary) 100%);
  color: var(--text-white);
  box-shadow: 0 2px 14px rgba(20, 83, 45, 0.28), 0 1px 3px rgba(20, 83, 45, 0.18);
  letter-spacing: -0.01em;
}

.btn-primary:hover {
  background: linear-gradient(160deg, #1c9955 0%, #113d22 100%);
  box-shadow: 0 6px 24px rgba(20, 83, 45, 0.36), 0 2px 8px rgba(20, 83, 45, 0.22);
  transform: translateY(-2px);
  color: var(--text-white);
}

.btn-secondary {
  background: linear-gradient(160deg, #f06b28 0%, var(--orange-accent) 100%);
  color: var(--text-white);
  box-shadow: 0 2px 14px rgba(194, 65, 12, 0.24), 0 1px 3px rgba(194, 65, 12, 0.16);
  letter-spacing: -0.01em;
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(194, 65, 12, 0.32), 0 2px 8px rgba(194, 65, 12, 0.20);
  color: var(--text-white);
}

.btn-outline {
  background: var(--bg-card);
  color: var(--green-primary);
  border-color: rgba(20, 83, 45, 0.30);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.04);
}

.btn-outline:hover {
  background: var(--green-pale-2);
  border-color: rgba(20, 83, 45, 0.40);
  box-shadow: 0 4px 16px rgba(20, 83, 45, 0.10);
  transform: translateY(-2px);
  color: var(--green-primary);
}

.btn-lg {
  /* Un peu plus "pill" visuellement (arrondi + confort) */
  padding: calc(var(--space-4) + 6px) calc(var(--space-10) + 4px);
  font-size: var(--text-lg);
}

.btn-sm {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
}

/* ============================================
   Glass Card — solid blanc, performant
   backdrop-filter conservé uniquement pour header/dropdown
   ============================================ */
.card-glass {
  background: #FFFFFF;
  border: 1px solid rgba(15, 23, 42, 0.07);
  border-radius: var(--radius-xl);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.05), 0 1px 2px rgba(15, 23, 42, 0.04);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.card-glass:hover {
  border-color: rgba(20, 83, 45, 0.18);
  box-shadow: 0 10px 40px rgba(15, 23, 42, 0.10), 0 2px 8px rgba(15, 23, 42, 0.06);
  transform: translateY(-3px);
}

/* ============================================
   Badge
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  font-family: var(--font-heading);
  letter-spacing: 0.05em;
}

.badge-green {
  background: var(--green-pale);
  color: var(--green-primary);
  border: 1px solid rgba(20, 83, 45, 0.2);
}

.badge-orange {
  background: #FFF7ED;
  color: var(--orange-accent);
  border: 1px solid rgba(194, 65, 12, 0.25);
}

/* ============================================
   Grid Utilities
   ============================================ */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

/* ============================================
   Glow Effects
   ============================================ */
.glow-green {
  box-shadow: var(--shadow-glow);
}

.glow-green-sm {
  box-shadow: var(--shadow-glow-sm);
}

/* ============================================
   Divider
   ============================================ */
.divider {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--green-primary), var(--green-glow));
  border-radius: var(--radius-full);
  margin: var(--space-4) auto;
}

/* ============================================
   Responsive Media Queries
   ============================================ */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .section-subtitle {
    font-size: var(--text-base);
  }
}

@media (max-width: 480px) {
  .btn-lg {
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
  }
}