/*
  Fichier  : css/style.css
  Projet   : Astera Drive - Site vitrine
  Role     : Feuille de style globale du site (theme clair/sombre, mise en
             page, typographie, composants et animations). Chargee par
             index.html et privacy.html.
*/

/* ---------------------------------------------------------------------- */
/* 1. Variables de theme                                                  */
/* ---------------------------------------------------------------------- */

:root {
  /* Couleurs de marque (degrade bleu -> violet -> magenta) */
  --color-brand-blue: #2E5EFF;
  --color-brand-violet: #8B3EF0;
  --color-brand-magenta: #E0298C;
  --gradient-brand: linear-gradient(
    135deg,
    var(--color-brand-blue) 0%,
    var(--color-brand-violet) 55%,
    var(--color-brand-magenta) 100%
  );
  --gradient-brand-wide: linear-gradient(
    115deg,
    var(--color-brand-blue) 0%,
    var(--color-brand-violet) 35%,
    var(--color-brand-magenta) 65%,
    var(--color-brand-violet) 100%
  );

  /* Theme clair (valeurs par defaut) */
  --bg: #ffffff;
  --bg-secondary: #f5f6fb;
  --surface: #ffffff;
  --text: #14161f;
  --text-secondary: #545866;
  --border: #e4e6ee;
  --shadow: rgba(20, 22, 31, 0.08);
  --shadow-strong: rgba(20, 22, 31, 0.16);

  /* Typographie */
  --font-family: "Baloo 2", "Segoe UI", system-ui, -apple-system, sans-serif;

  /* Mise en page */
  --container-width: 1140px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: 0.2s ease;
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --bg: #0e0f16;
  --bg-secondary: #14151f;
  --surface: #1b1d28;
  --text: #f4f5f9;
  --text-secondary: #a7abb8;
  --border: #2a2d3a;
  --shadow: rgba(0, 0, 0, 0.35);
  --shadow-strong: rgba(0, 0, 0, 0.55);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------------------------------------------------------------------- */
/* 2. Reset et base                                                       */
/* ---------------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-family);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-family);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.6em;
}

p {
  margin: 0 0 1em;
  color: var(--text-secondary);
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--color-brand-violet);
  outline-offset: 2px;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.text-gradient {
  background: var(--gradient-brand-wide);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradient-flow 8s ease infinite;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* Toutes les images de logo conservent leur ratio d'origine :
   hauteur fixe, largeur automatique, jamais de deformation. */
.logo-img {
  height: 36px;
  width: auto;
  object-fit: contain;
}

/* ---------------------------------------------------------------------- */
/* 3. Animations d'entree (reveal au scroll)                              */
/* ---------------------------------------------------------------------- */

@keyframes gradient-flow {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

@keyframes float-y {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-14px);
  }
}

@keyframes pulse-ring {
  0% {
    box-shadow: 0 0 0 0 rgba(139, 62, 240, 0.35);
  }
  70% {
    box-shadow: 0 0 0 16px rgba(139, 62, 240, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(139, 62, 240, 0);
  }
}

@keyframes shimmer {
  0% {
    transform: translateX(-120%);
  }
  100% {
    transform: translateX(220%);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
  transition-delay: var(--reveal-delay, 0s);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------------------------------------------------------------------- */
/* 4. Boutons                                                             */
/* ---------------------------------------------------------------------- */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition),
    background-color var(--transition), border-color var(--transition);
}

.btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.btn:hover {
  transform: translateY(-3px);
}

.btn-primary {
  background: var(--gradient-brand-wide);
  background-size: 220% 220%;
  animation: gradient-flow 6s ease infinite;
  color: #ffffff;
  box-shadow: 0 14px 30px var(--shadow-strong);
}

.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  width: 40%;
  background: linear-gradient(
    115deg,
    transparent 0%,
    rgba(255, 255, 255, 0.35) 50%,
    transparent 100%
  );
  transform: translateX(-120%);
  animation: shimmer 3.2s ease-in-out infinite;
}

.btn-primary:hover {
  box-shadow: 0 18px 36px var(--shadow-strong);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover {
  border-color: var(--color-brand-violet);
}

.btn-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: default;
}

.btn-badge svg {
  width: 18px;
  height: 18px;
}

/* ---------------------------------------------------------------------- */
/* 5. Header                                                              */
/* ---------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  transition: transform var(--transition);
}

.brand:hover {
  transform: translateY(-1px);
}

.brand-logo {
  height: 34px;
  width: auto;
  object-fit: contain;
  border-radius: 8px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.main-nav a {
  position: relative;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition);
  padding-bottom: 4px;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-brand);
  transition: width var(--transition);
}

.main-nav a:hover {
  color: var(--text);
}

.main-nav a:hover::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--text);
  transition: border-color var(--transition), transform var(--transition);
}

.theme-toggle:hover {
  border-color: var(--color-brand-violet);
  transform: rotate(16deg);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.icon-moon {
  display: none;
}

[data-theme="dark"] .icon-sun {
  display: none;
}

[data-theme="dark"] .icon-moon {
  display: block;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 20px;
  margin: 0 auto;
  background-color: var(--text);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------------------------------------------------------------------- */
/* 6. Hero                                                                */
/* ---------------------------------------------------------------------- */

.hero {
  padding: 96px 0 104px;
  overflow: hidden;
  position: relative;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  z-index: -1;
}

.hero::before {
  top: -220px;
  left: -160px;
  width: 480px;
  height: 480px;
  background: var(--color-brand-blue);
  opacity: 0.18;
  animation: float-y 9s ease-in-out infinite;
}

.hero::after {
  bottom: -240px;
  right: -160px;
  width: 460px;
  height: 460px;
  background: var(--color-brand-magenta);
  opacity: 0.16;
  animation: float-y 11s ease-in-out infinite reverse;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-brand-violet);
  margin-bottom: 14px;
}

.eyebrow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-brand);
  animation: pulse-ring 2.4s ease-out infinite;
}

.hero h1 {
  font-size: clamp(2.2rem, 4.2vw, 3.4rem);
  margin-bottom: 0.5em;
}

.hero-lead {
  font-size: 1.1rem;
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 8px;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-card {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  background: var(--gradient-brand-wide);
  background-size: 200% 200%;
  animation: gradient-flow 10s ease infinite;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 44px;
  box-shadow: 0 30px 70px var(--shadow-strong);
}

.hero-logo {
  width: 100%;
  filter: drop-shadow(0 12px 24px rgba(0, 0, 0, 0.3));
  animation: float-y 5s ease-in-out infinite;
}

/* ---------------------------------------------------------------------- */
/* 7. Chiffres cles                                                       */
/* ---------------------------------------------------------------------- */

.stats {
  padding: 56px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.stat-value {
  font-family: var(--font-family);
  font-weight: 800;
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.92rem;
  color: var(--text-secondary);
  font-weight: 600;
}

/* ---------------------------------------------------------------------- */
/* 8. Fonctionnalites                                                     */
/* ---------------------------------------------------------------------- */

.features {
  padding: 88px 0;
  background-color: var(--bg-secondary);
}

.features h2,
.about h2,
.channels h2,
.cta h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.3rem);
  text-align: center;
}

.section-lead {
  text-align: center;
  max-width: 58ch;
  margin: 0 auto 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px var(--shadow);
  border-color: transparent;
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: transform var(--transition);
}

.feature-card:hover .feature-icon {
  transform: rotate(-6deg) scale(1.06);
}

.feature-icon svg {
  width: 26px;
  height: 26px;
  color: #ffffff;
}

.feature-card h3 {
  font-size: 1.18rem;
  margin-bottom: 0.5em;
}

.feature-card p {
  margin-bottom: 10px;
}

.feature-meta {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-brand-violet);
  letter-spacing: 0.02em;
}

/* ---------------------------------------------------------------------- */
/* 9. A propos                                                            */
/* ---------------------------------------------------------------------- */

.about {
  padding: 96px 0;
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.about-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 14px;
  color: var(--text-secondary);
}

.about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gradient-brand);
}

.about-visual {
  min-height: 280px;
  border-radius: var(--radius-lg);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-visual::after {
  content: "";
  position: absolute;
  inset: -40%;
  background: var(--gradient-brand-wide);
  background-size: 200% 200%;
  opacity: 0.18;
  animation: gradient-flow 9s ease infinite;
}

.about-visual-badge {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 28px 36px;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 20px 40px var(--shadow);
}

.about-visual-badge strong {
  font-size: 1.4rem;
}

.about-visual-badge span {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ---------------------------------------------------------------------- */
/* 10. Canaux (Telegram / WhatsApp / Email)                               */
/* ---------------------------------------------------------------------- */

.channels {
  padding: 88px 0;
  background-color: var(--bg-secondary);
}

.channels-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.channel-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 26px;
  border-radius: var(--radius-md);
  background-color: var(--surface);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}

.channel-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px var(--shadow);
  border-color: transparent;
}

.channel-icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-brand);
  color: #ffffff;
}

.channel-icon svg {
  width: 22px;
  height: 22px;
}

.channel-text h3 {
  font-size: 1.05rem;
  margin-bottom: 0.3em;
}

.channel-text p {
  margin-bottom: 6px;
  font-size: 0.94rem;
}

.channel-link {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-brand-violet);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.channel-link svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition);
}

.channel-card:hover .channel-link svg {
  transform: translateX(4px);
}

/* ---------------------------------------------------------------------- */
/* 11. Telechargement / Appel a l'action                                  */
/* ---------------------------------------------------------------------- */

.cta {
  padding: 80px 0 104px;
}

.cta-inner {
  position: relative;
  text-align: center;
  background: var(--gradient-brand-wide);
  background-size: 220% 220%;
  animation: gradient-flow 12s ease infinite;
  border-radius: var(--radius-lg);
  padding: 64px 32px;
  color: #ffffff;
  overflow: hidden;
}

.cta-inner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.18), transparent 55%);
}

.cta-inner > * {
  position: relative;
  z-index: 1;
}

.cta-inner h2 {
  color: #ffffff;
}

.cta-inner p {
  color: rgba(255, 255, 255, 0.92);
  max-width: 50ch;
  margin: 0 auto 28px;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.cta-actions .btn-primary {
  background: #ffffff;
  background-image: none;
  animation: none;
  color: var(--color-brand-violet);
}

.cta-actions .btn-primary::after {
  background: linear-gradient(
    115deg,
    transparent 0%,
    rgba(139, 62, 240, 0.16) 50%,
    transparent 100%
  );
}

.cta-actions .btn-badge {
  border-color: rgba(255, 255, 255, 0.5);
  color: rgba(255, 255, 255, 0.9);
}

/* ---------------------------------------------------------------------- */
/* 12. Footer                                                             */
/* ---------------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding-top: 40px;
  background-color: var(--bg-secondary);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 32px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.footer-logo {
  height: 30px;
  width: auto;
  object-fit: contain;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: var(--text);
}

.footer-credit {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Le logo RCBG (image source 869x380) garde son ratio naturel :
   hauteur fixe, largeur automatique -> plus de deformation. */
.footer-logo-rcbg {
  height: 22px;
  width: auto;
  object-fit: contain;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 24px;
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  font-size: 0.85rem;
}

/* ---------------------------------------------------------------------- */
/* 13. Pages legales (privacy.html)                                       */
/* ---------------------------------------------------------------------- */

.legal-main {
  padding: 56px 0 96px;
}

.legal-container {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
}

.legal-toc {
  position: sticky;
  top: 96px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  background-color: var(--surface);
}

.toc-title {
  font-weight: 700;
  color: var(--text);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.legal-toc nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.legal-toc a {
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 600;
  transition: color var(--transition);
}

.legal-toc a:hover {
  color: var(--color-brand-violet);
}

.legal-content h1 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}

.legal-updated {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 40px;
}

.legal-content section {
  padding-top: 24px;
  margin-bottom: 40px;
  border-top: 1px solid var(--border);
}

.legal-content section:first-of-type {
  border-top: none;
  padding-top: 0;
}

.legal-content h2 {
  font-size: 1.5rem;
  margin-bottom: 0.8em;
}

.legal-content h3 {
  font-size: 1.08rem;
  margin-top: 1.6em;
}

.legal-content p,
.legal-content li {
  color: var(--text-secondary);
}

.legal-content ul {
  margin: 0 0 1em;
  padding-left: 20px;
  list-style: disc;
}

.legal-content li {
  margin-bottom: 6px;
}

.legal-content a {
  color: var(--color-brand-violet);
  font-weight: 600;
}

/* ---------------------------------------------------------------------- */
/* 14. Responsive                                                         */
/* ---------------------------------------------------------------------- */

@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .about-inner {
    grid-template-columns: 1fr;
  }

  .legal-container {
    grid-template-columns: 1fr;
  }

  .legal-toc {
    position: static;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 32px;
  }

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

@media (max-width: 780px) {
  .main-nav {
    position: fixed;
    inset: 73px 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    background-color: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 20px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }

  .main-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .main-nav a {
    width: 100%;
    padding: 10px 0;
  }

  .nav-toggle {
    display: flex;
  }

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

@media (max-width: 560px) {
  .hero {
    padding: 72px 0 80px;
  }

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

  .cta-inner {
    padding: 44px 22px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}