/* ============================================================
   GWS — Gestion WiFi Simplifiée
   Shared Stylesheet — style.css
   ============================================================ */

/* ----- Custom Properties ----- */
:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #3b82f6;
  --color-primary-subtle: #dbeafe;
  --color-accent: #06b6d4;

  --color-slate-950: #020617;
  --color-slate-900: #0f172a;
  --color-slate-800: #1e293b;
  --color-slate-700: #334155;
  --color-slate-600: #475569;
  --color-slate-500: #64748b;
  --color-slate-400: #94a3b8;
  --color-slate-300: #cbd5e1;
  --color-slate-200: #e2e8f0;
  --color-slate-100: #f1f5f9;
  --color-slate-50: #f8fafc;

  --color-white: #ffffff;
  --color-success: #22c55e;
  --color-warning: #f59e0b;

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', Arial, 'Noto Sans', sans-serif, 'Apple Color Emoji',
    'Segoe UI Emoji';

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08),
    0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08),
    0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 8px 10px -6px rgba(0, 0, 0, 0.05);

  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  --container-max: 1120px;
  --container-padding: 1.25rem;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-slate-700);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.25;
  color: var(--color-slate-900);
  font-weight: 700;
}

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

/* ----- Section base ----- */
.section {
  padding: 4rem 0;
}

.section-title {
  font-size: 1.75rem;
  text-align: center;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  text-align: center;
  color: var(--color-slate-500);
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: 3rem;
  font-size: 1.05rem;
}

/* ============================================================
   HEADER / NAV
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background var(--transition-base);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-white);
  letter-spacing: -0.02em;
}

.nav-brand svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links a {
  color: var(--color-slate-300);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-white);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  background: linear-gradient(
    135deg,
    var(--color-slate-900) 0%,
    var(--color-slate-800) 50%,
    #1e3a5f 100%
  );
  color: var(--color-white);
  padding: 8rem 0 5rem;
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
      circle at 20% 80%,
      rgba(37, 99, 235, 0.15) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 20%,
      rgba(6, 182, 212, 0.1) 0%,
      transparent 50%
    );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 88px;
  height: 88px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  margin-bottom: 1.75rem;
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.35);
}

.hero-logo svg {
  width: 48px;
  height: 48px;
}

.hero h1 {
  font-size: 2.25rem;
  color: var(--color-white);
  margin-bottom: 1rem;
  letter-spacing: -0.025em;
}

.hero h1 span {
  display: block;
  background: linear-gradient(90deg, var(--color-primary-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-slate-300);
  max-width: 540px;
  margin-inline: auto;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  line-height: 1;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

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

/* ============================================================
   FEATURES — 4-card grid
   ============================================================ */
.features {
  background: var(--color-slate-50);
}

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

.feature-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-slate-100);
  transition: all var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-subtle);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
}

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

.feature-icon--blue {
  background: var(--color-primary-subtle);
  color: var(--color-primary);
}

.feature-icon--green {
  background: #dcfce7;
  color: #16a34a;
}

.feature-icon--purple {
  background: #ede9fe;
  color: #7c3aed;
}

.feature-icon--amber {
  background: #fef3c7;
  color: #d97706;
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--color-slate-500);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ============================================================
   HOW IT WORKS — 3 steps
   ============================================================ */
.steps {
  background: var(--color-white);
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  counter-reset: step;
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-white);
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
}

.step h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.step p {
  color: var(--color-slate-500);
  font-size: 0.95rem;
  max-width: 320px;
  margin-inline: auto;
}

/* connector line between steps — visible on desktop */
.step-connector {
  display: none;
}

/* ============================================================
   CTA BANNER
   ============================================================ */
.cta-banner {
  background: linear-gradient(
    135deg,
    var(--color-slate-900),
    var(--color-slate-800)
  );
  color: var(--color-white);
  text-align: center;
  padding: 4rem 0;
}

.cta-banner h2 {
  color: var(--color-white);
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.cta-banner p {
  color: var(--color-slate-300);
  margin-bottom: 2rem;
  font-size: 1.05rem;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-slate-950);
  color: var(--color-slate-400);
  padding: 2.5rem 0;
  font-size: 0.875rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  color: var(--color-slate-400);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-copy {
  color: var(--color-slate-600);
}

/* ============================================================
   PRIVACY PAGE — prose layout
   ============================================================ */
.page-header {
  background: linear-gradient(
    135deg,
    var(--color-slate-900),
    var(--color-slate-800)
  );
  color: var(--color-white);
  padding: 7rem 0 3rem;
  text-align: center;
}

.page-header h1 {
  color: var(--color-white);
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.page-header p {
  color: var(--color-slate-400);
  font-size: 0.95rem;
}

.prose {
  max-width: 760px;
  margin-inline: auto;
  padding: 3rem var(--container-padding) 5rem;
}

.prose h2 {
  font-size: 1.35rem;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-slate-100);
}

.prose h3 {
  font-size: 1.1rem;
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
}

.prose p {
  margin-bottom: 1rem;
}

.prose ul {
  margin-bottom: 1rem;
  padding-left: 1.25rem;
}

.prose ul li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
}

.prose ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
}

.prose strong {
  color: var(--color-slate-900);
  font-weight: 600;
}

.prose a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 500;
  margin-bottom: 2rem;
}

.back-link svg {
  width: 18px;
  height: 18px;
}

/* ============================================================
   FADE-IN ON SCROLL
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* stagger children */
.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ============================================================
   RESPONSIVE — Tablet (>= 768px)
   ============================================================ */
@media (min-width: 768px) {
  :root {
    --container-padding: 2rem;
  }

  .section {
    padding: 5rem 0;
  }

  .section-title {
    font-size: 2rem;
  }

  .hero {
    padding: 10rem 0 6rem;
  }

  .hero h1 {
    font-size: 3rem;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

  .hero-logo {
    width: 100px;
    height: 100px;
  }

  .hero-logo svg {
    width: 52px;
    height: 52px;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
  }

  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: flex-start;
  }

  .step-connector {
    display: block;
    position: absolute;
    top: 28px;
    right: -1rem;
    width: calc(100% - 56px);
    left: calc(50% + 36px);
    height: 2px;
    background: var(--color-slate-200);
  }

  .step:last-child .step-connector {
    display: none;
  }

  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }

  .page-header h1 {
    font-size: 2.5rem;
  }
}

/* ============================================================
   RESPONSIVE — Desktop (>= 1024px)
   ============================================================ */
@media (min-width: 1024px) {
  .hero h1 {
    font-size: 3.5rem;
  }

  .hero-subtitle {
    font-size: 1.25rem;
    max-width: 580px;
  }

  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .feature-card {
    padding: 2.25rem 1.75rem;
  }

  .cta-banner h2 {
    font-size: 2rem;
  }

  .section-title {
    font-size: 2.25rem;
  }
}