/**
 * DigiSchool Africa — Layout Zoom-Like Final
 * V2.2.x FINAL FIX — NO COMPROMISE
 * Date: 2026-01-18
 * 
 * Structure: Rails latéraux + contenu centré + filigranes + animations légères
 * Inspiration: https://www.zoom.com (respiration, hiérarchie, premium)
 */

/* ========== VARIABLES GLOBALES ========== */
:root {
  --ds-blue-primary: #1E88E5;
  --ds-blue-dark: #0B1B3A;
  --ds-green-accent: #22c55e;
  --ds-violet-accent: #7C4DFF;
  --ds-text-primary: #0B1B3A;
  --ds-text-secondary: #37474F;
  --ds-text-muted: #546E7A;
  --ds-white: #FFFFFF;
  --ds-gray-light: #F5F7FA;
  --ds-gray-border: #ECEFF1;
  
  --ds-main-width: 1180px;
  --ds-rail-width: max(120px, calc((100vw - var(--ds-main-width)) / 2));
  --ds-header-height: 86px;
}

/* ========== RESET & BASE ========== */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  background: var(--ds-white);
  color: var(--ds-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Compensation header fixed */
body.has-fixed-header {
  padding-top: 74px;
}

@media (max-width: 960px) {
  body.has-fixed-header {
    padding-top: 64px;
  }
}

@media (max-width: 480px) {
  body.has-fixed-header {
    padding-top: 56px;
  }
}

/* ========== LAYOUT GLOBAL: WRAPPER + RAILS ========== */
.ds-page {
  position: relative;
  min-height: 100vh;
  display: flex;
  width: 100%;
  overflow-x: hidden; /* Éviter scroll horizontal */
  overflow-y: visible; /* Permettre scroll vertical + header */
}

/* Rails latéraux */
.ds-rail {
  position: fixed;
  top: 0;
  bottom: 0;
  width: var(--ds-rail-width);
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.ds-rail-left {
  left: 0;
  background: linear-gradient(180deg, 
    var(--ds-blue-dark) 0%, 
    #1a2942 50%, 
    #0B1B3A 100%
  );
}

.ds-rail-right {
  right: 0;
  background: linear-gradient(180deg, 
    #1a2942 0%, 
    var(--ds-blue-dark) 50%, 
    #0e1f38 100%
  );
}

/* Animation gradient subtile */
@keyframes ds-gradient-shift {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.92; }
}

.ds-rail-left::before,
.ds-rail-right::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    var(--ds-blue-primary) 0%, 
    var(--ds-violet-accent) 50%, 
    var(--ds-green-accent) 100%
  );
  opacity: 0.12;
  animation: ds-gradient-shift 8s ease-in-out infinite;
}

/* Filigranes B2C */
.ds-rail-b2c::after {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 300px;
  background-image: url('/assets/images/watermark-b2c.svg');
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0.08;
  filter: grayscale(100%) brightness(1.5);
}

/* Filigranes B2B */
.ds-rail-b2b::after {
  content: '';
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 300px;
  background-image: url('/assets/images/watermark-b2b.svg');
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0.10;
  filter: grayscale(100%) brightness(1.4);
}

/* Zone centrale (MAIN) */
.ds-main {
  flex: 1;
  max-width: var(--ds-main-width);
  margin: 0 auto;
  padding: 0 32px;
  background: var(--ds-white);
  position: relative;
  z-index: 10;
  width: 100%;
}

/* Sections dans .ds-main */
.ds-section {
  padding: 80px 0;
}

.ds-section:first-child {
  padding-top: 120px;
}

.ds-section:last-child {
  padding-bottom: 120px;
}

/* ========== TYPOGRAPHIE ZOOM-LIKE ========== */
.ds-title-hero {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--ds-blue-dark);
  margin: 0 0 24px;
  letter-spacing: -0.02em;
}

.ds-title-section {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ds-blue-dark);
  margin: 0 0 16px;
  text-align: center;
}

.ds-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  font-weight: 400;
  line-height: 1.6;
  color: var(--ds-text-secondary);
  margin: 0 0 32px;
  max-width: 700px;
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

/* ========== CARDS PREMIUM ========== */
.ds-card {
  background: var(--ds-white);
  border: 1px solid var(--ds-gray-border);
  border-radius: 16px;
  padding: 32px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 8px rgba(11, 27, 58, 0.04);
}

.ds-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(11, 27, 58, 0.12);
  border-color: var(--ds-blue-primary);
}

.ds-card-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ds-blue-dark);
  margin: 0 0 12px;
}

.ds-card-text {
  font-size: 1rem;
  color: var(--ds-text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* ========== GRILLES RESPONSIVE ========== */
.ds-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.ds-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.ds-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* ========== BOUTONS CTA ZOOM-LIKE ========== */
.ds-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-family: inherit;
}

.ds-btn-primary {
  background: linear-gradient(135deg, var(--ds-blue-primary), var(--ds-violet-accent), var(--ds-green-accent));
  color: var(--ds-white);
  box-shadow: 0 4px 12px rgba(30, 136, 229, 0.3);
}

.ds-btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(30, 136, 229, 0.4);
}

.ds-btn-secondary {
  background: var(--ds-white);
  color: var(--ds-blue-primary);
  border: 2px solid var(--ds-blue-primary);
}

.ds-btn-secondary:hover {
  background: var(--ds-blue-primary);
  color: var(--ds-white);
  transform: translateY(-2px);
}

/* ========== HERO SECTION ========== */
.ds-hero {
  text-align: center;
  padding: 100px 0 80px;
  background: linear-gradient(180deg, 
    var(--ds-gray-light) 0%, 
    var(--ds-white) 100%
  );
  margin: 0 -32px;
  padding-left: 32px;
  padding-right: 32px;
}

.ds-hero-content {
  max-width: 800px;
  margin: 0 auto;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1280px) {
  :root {
    --ds-main-width: 95%;
    --ds-rail-width: 2.5%;
  }
  
  .ds-rail-left,
  .ds-rail-right {
    opacity: 0.7;
  }
}

@media (max-width: 960px) {
  .ds-grid-3,
  .ds-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .ds-section {
    padding: 60px 0;
  }
  
  .ds-main {
    padding: 0 24px;
  }
  
  /* Rails cachés sur mobile */
  .ds-rail {
    display: none;
  }
}

@media (max-width: 640px) {
  .ds-grid-2,
  .ds-grid-3,
  .ds-grid-4 {
    grid-template-columns: 1fr;
  }
  
  .ds-section {
    padding: 48px 0;
  }
  
  .ds-main {
    padding: 0 20px;
  }
  
  body.has-sticky-header {
    padding-top: 70px;
  }
}

/* ========== HEADER STICKY SUPPORT ========== */
.digischool-global-header {
  position: fixed !important;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10000;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.digischool-global-header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

/* ========== ANIMATIONS PERFORMANCE ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ========== UTILITAIRES ========== */
.ds-text-center {
  text-align: center;
}

.ds-mt-0 { margin-top: 0; }
.ds-mt-16 { margin-top: 16px; }
.ds-mt-32 { margin-top: 32px; }
.ds-mt-48 { margin-top: 48px; }
.ds-mt-64 { margin-top: 64px; }

.ds-mb-0 { margin-bottom: 0; }
.ds-mb-16 { margin-bottom: 16px; }
.ds-mb-32 { margin-bottom: 32px; }
.ds-mb-48 { margin-bottom: 48px; }
.ds-mb-64 { margin-bottom: 64px; }

.ds-hidden {
  display: none !important;
}

.ds-visible {
  display: block !important;
}