/* LTE Marketing Site - Design System
   Couleurs Azimut + Poppins
*/

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-primary: #337cea;
  --color-primary-dark: #2563d6;
  --color-primary-light: #e8f0fe;
  --color-navy: #112b45;
  --color-navy-darker: #122a44;
  --color-navy-mid: #2e4158;
  --color-text: #112b45;
  --color-text-secondary: #2e4158;
  --color-text-muted: #6b7a8c;
  --color-bg: #ffffff;
  --color-bg-soft: #f5f7fa;
  --color-border: #e5e7eb;
  --color-success: #16a34a;
  --color-warning: #f59e0b;
  --shadow-sm: 0 1px 2px rgba(17, 43, 69, 0.05);
  --shadow-md: 0 4px 12px rgba(17, 43, 69, 0.08);
  --shadow-lg: 0 8px 24px rgba(17, 43, 69, 0.10);
  --shadow-xl: 0 24px 48px rgba(17, 43, 69, 0.18);
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

html, body {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }

/* === HEADER === */
.site-header {
  background: white;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
  padding: 14px 0;
}
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.site-brand {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  text-decoration: none;
}
.site-brand:hover { text-decoration: none; }
.site-brand .b1 { color: var(--color-navy); }
.site-brand .b2 { color: var(--color-primary); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.site-nav a {
  color: var(--color-navy);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
}
.site-nav a:hover { color: var(--color-primary); text-decoration: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--color-primary); color: white; }
.btn-primary:hover { background: var(--color-primary-dark); box-shadow: 0 8px 24px rgba(51, 124, 234, 0.35); }
.btn-secondary { background: white; color: var(--color-navy); border: 2px solid var(--color-border); }
.btn-secondary:hover { background: var(--color-primary-light); border-color: var(--color-primary); color: var(--color-primary); }
.btn-light { background: rgba(255,255,255,0.15); color: white; border: 2px solid rgba(255,255,255,0.3); }
.btn-light:hover { background: white; color: var(--color-primary); border-color: white; }
.btn-lg { padding: 16px 32px; font-size: 16px; }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 26px;
  cursor: pointer;
  color: var(--color-navy);
}

@media (max-width: 768px) {
  .site-nav .nav-links { display: none; }
  .site-nav.open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    padding: 20px;
    box-shadow: var(--shadow-lg);
    gap: 14px;
  }
  .menu-toggle { display: block; }
}

/* === HERO === */
.hero {
  background: linear-gradient(135deg, #112b45 0%, #1a4172 60%, #337cea 100%);
  color: white;
  padding: 80px 0 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-content { position: relative; z-index: 1; max-width: 820px; margin: 0 auto; }
.hero-eyebrow {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  color: white;
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}
.hero h1 {
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}
.hero h1 .accent { color: #5a9bff; display: block; }
.hero-sub {
  font-size: clamp(16px, 2vw, 19px);
  color: rgba(255,255,255,0.85);
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.6;
}
.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero-badges {
  display: flex;
  gap: 28px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
  font-size: 14px;
  color: rgba(255,255,255,0.85);
}
.hero-badge { display: flex; align-items: center; gap: 6px; }
.hero-badge::before { content: '✓'; font-weight: 700; color: #5a9bff; font-size: 16px; }

/* === SECTIONS === */
section { padding: 70px 0; }
section.alt { background: var(--color-bg-soft); }
.section-eyebrow {
  display: inline-block;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--color-navy);
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  line-height: 1.2;
}
.section-sub {
  font-size: 17px;
  color: var(--color-text-secondary);
  max-width: 680px;
  margin-bottom: 40px;
}
.section-header { text-align: center; margin-bottom: 50px; }
.section-header .section-sub { margin: 0 auto; }

/* === STEPS === */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
@media (max-width: 900px) { .steps-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .steps-grid { grid-template-columns: 1fr; } }
.step {
  text-align: center;
  position: relative;
}
.step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #337cea, #1a4172);
  color: white;
  font-size: 22px;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  box-shadow: 0 8px 20px rgba(51, 124, 234, 0.35);
}
.step h3 { font-size: 18px; font-weight: 700; color: var(--color-navy); margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--color-text-secondary); line-height: 1.6; }

/* === PRODUCTS === */
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}
@media (max-width: 900px) { .products-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .products-grid { grid-template-columns: 1fr; } }

.product-card {
  background: white;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}
.product-card.featured { border-color: var(--color-primary); box-shadow: var(--shadow-lg); }
.product-card.featured::before {
  content: 'POPULAIRE';
  position: absolute;
  top: 14px;
  right: 14px;
  background: var(--color-primary);
  color: white;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.product-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.product-icon {
  font-size: 48px;
  margin-bottom: 14px;
}
.product-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 10px;
}
.product-price {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 4px;
}
.product-price-suffix {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 14px;
}
.product-features {
  list-style: none;
  padding: 0;
  margin: 14px 0;
  font-size: 13px;
  color: var(--color-text-secondary);
}
.product-features li { padding: 4px 0; padding-left: 20px; position: relative; }
.product-features li::before { content: '✓'; position: absolute; left: 0; color: var(--color-success); font-weight: 700; }

/* === FEATURES (Pourquoi LTE) === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 900px) { .features-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .features-grid { grid-template-columns: 1fr; } }
.feature {
  background: white;
  padding: 28px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}
.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 12px;
  font-size: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.feature h3 { font-size: 17px; font-weight: 700; color: var(--color-navy); margin-bottom: 8px; }
.feature p { font-size: 14px; color: var(--color-text-secondary); line-height: 1.6; }

/* === FAQ === */
.faq-grid { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.faq-q {
  padding: 18px 22px;
  font-weight: 700;
  color: var(--color-navy);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 15px;
}
.faq-q::-webkit-details-marker { display: none; }
.faq-q::after { content: '+'; font-size: 22px; color: var(--color-primary); transition: transform 0.2s; }
details[open] .faq-q::after { transform: rotate(45deg); }
.faq-a { padding: 0 22px 18px; font-size: 14px; color: var(--color-text-secondary); line-height: 1.7; }

/* === CTA === */
.cta-section {
  background: linear-gradient(135deg, #112b45 0%, #1a4172 100%);
  color: white;
  text-align: center;
  border-radius: var(--radius-xl);
  padding: 60px 30px;
  margin: 40px 0;
}
.cta-section h2 {
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 800;
  margin-bottom: 14px;
  color: white;
}
.cta-section p {
  font-size: 17px;
  color: rgba(255,255,255,0.85);
  max-width: 560px;
  margin: 0 auto 28px;
}

/* === FOOTER === */
.site-footer {
  background: var(--color-navy-darker);
  color: rgba(255,255,255,0.7);
  padding: 50px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 30px;
}
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand { font-size: 22px; font-weight: 800; margin-bottom: 12px; line-height: 1; }
.footer-brand .b1 { color: white; }
.footer-brand .b2 { color: var(--color-primary); }
.footer-tagline { font-size: 14px; line-height: 1.6; margin-bottom: 14px; }
.footer h4 { color: white; font-size: 14px; font-weight: 700; margin-bottom: 14px; text-transform: uppercase; letter-spacing: 0.5px; }
.footer ul { list-style: none; padding: 0; }
.footer ul li { padding: 4px 0; }
.footer a { color: rgba(255,255,255,0.7); text-decoration: none; font-size: 14px; }
.footer a:hover { color: white; text-decoration: none; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  text-align: center;
  font-size: 13px;
}

/* === DEMANDE FORM === */
.form-wrap {
  max-width: 700px;
  margin: 40px auto;
  padding: 0 20px;
}
.form-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-md);
}
@media (max-width: 600px) { .form-card { padding: 28px 22px; } }
.form-card h1 {
  font-size: 28px;
  font-weight: 800;
  color: var(--color-navy);
  margin-bottom: 8px;
}
.form-card .lead {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
}
.field { margin-bottom: 18px; }
.field-label { display: block; font-size: 14px; font-weight: 600; color: var(--color-text-secondary); margin-bottom: 6px; }
.field-required { color: var(--color-success); margin-left: 4px; }
.field-input,
.field-textarea,
.field-select {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-family: inherit;
  background: white;
  color: var(--color-navy);
}
.field-input:focus,
.field-textarea:focus,
.field-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(51, 124, 234, 0.15);
}
.field-textarea { min-height: 100px; resize: vertical; }
.field-help { font-size: 12px; color: var(--color-text-muted); margin-top: 4px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 600px) { .field-row { grid-template-columns: 1fr; } }

.product-radio-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
@media (max-width: 480px) { .product-radio-grid { grid-template-columns: 1fr; } }
.product-radio { cursor: pointer; position: relative; }
.product-radio input { position: absolute; opacity: 0; }
.product-radio-inner {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  transition: all 0.15s;
}
.product-radio input:checked + .product-radio-inner {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(51, 124, 234, 0.15);
}
.product-radio-name { font-weight: 700; color: var(--color-navy); font-size: 15px; }
.product-radio-price { font-size: 13px; color: var(--color-text-muted); margin-top: 2px; }

.alert { padding: 14px 18px; border-radius: var(--radius-md); font-size: 14px; line-height: 1.5; margin-bottom: 14px; }
.alert-success { background: #dcfce7; color: #065f46; border-left: 4px solid var(--color-success); }
.alert-error { background: #fee2e2; color: #991b1b; border-left: 4px solid #dc2626; }

.success-screen {
  text-align: center;
  padding: 60px 30px;
}
.success-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-success);
  color: white;
  font-size: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 12px 32px rgba(22, 163, 74, 0.3);
}
.success-screen h1 { color: var(--color-navy); margin-bottom: 14px; font-size: 28px; font-weight: 800; }
.success-screen p { color: var(--color-text-secondary); font-size: 16px; line-height: 1.6; margin-bottom: 14px; }

.hidden { display: none !important; }