/* ===== Variables ===== */
:root {
  --color-bg-dark: #0f2942;
  --color-bg-darker: #0a1f33;
  --color-bg-card: #ffffff;
  --color-primary: #0d9488;
  --color-primary-hover: #0f766e;
  --color-accent: #2dd4bf;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-text-on-dark: #f1f5f9;
  --color-border: #e2e8f0;
  --font-sans: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-serif: 'Source Serif 4', Georgia, serif;
  --shadow-card: 0 4px 6px -1px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.06);
  --shadow-soft: 0 10px 40px -10px rgb(15 41 66 / 0.15);
  --radius: 10px;
  --radius-lg: 14px;
}

/* ===== Reset & base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg-card);
}

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 0;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  color: inherit;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.nav-main {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-main a {
  color: var(--color-text-on-dark);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
}

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

.btn-header {
  padding: 0.5rem 1.125rem !important;
  background: var(--color-primary);
  color: white !important;
  border-radius: var(--radius);
}

.btn-header:hover {
  background: var(--color-primary-hover);
  color: white !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  background: transparent;
  border: none;
  color: var(--color-text-on-dark);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
}

@media (max-width: 768px) {
  .nav-main {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    flex-direction: column;
    align-items: stretch;
    padding: 4rem 1.5rem 1.5rem;
    background: var(--color-bg-darker);
    gap: 0;
    transform: translateX(100%);
    transition: transform 0.25s ease;
    box-shadow: -4px 0 20px rgb(0 0 0 / 0.2);
  }

  .nav-main.is-open {
    transform: translateX(0);
  }

  .nav-main a {
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .nav-toggle {
    display: flex;
  }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  padding: 6rem 0 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--color-bg-dark);
  background-image:
    radial-gradient(ellipse 90% 60% at 50% -10%, rgba(13, 148, 136, 0.2), transparent 50%),
    url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.025'%3E%3Ccircle cx='40' cy='40' r='2'/%3E%3Ccircle cx='0' cy='0' r='1'/%3E%3Ccircle cx='80' cy='0' r='1'/%3E%3Ccircle cx='0' cy='80' r='1'/%3E%3Ccircle cx='80' cy='80' r='1'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

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

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-text-on-dark);
  margin: 0 0 1.25rem;
  max-width: 18ch;
}

.hero-lead {
  font-size: 1.125rem;
  color: rgba(241, 245, 249, 0.88);
  max-width: 42rem;
  margin: 0 0 2rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

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

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

.btn-secondary {
  background: transparent;
  color: var(--color-text-on-dark);
  border: 2px solid rgba(255, 255, 255, 0.45);
}

.btn-secondary:hover {
  border-color: white;
  color: white;
}

/* ===== Sections ===== */
.section {
  padding: 4.5rem 0;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 400;
  color: var(--color-text);
  margin: 0 0 1rem;
}

.section-intro {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 38rem;
  margin: 0 0 2.5rem;
}

/* ===== Valeur ===== */
.section-valeur {
  background: #f8fafc;
}

.value-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.value-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}

.value-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
}

/* ===== Fonctionnalités / captures ===== */
.section-fonctionnalites {
  background: var(--color-bg-card);
}

.feature-cards {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  margin-bottom: 3rem;
}

.feature-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  align-items: stretch;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.feature-card:nth-child(even) .feature-card-image { order: 2; }
.feature-card:nth-child(even) .feature-card-content { order: 1; }

.feature-card-image {
  min-height: 240px;
  background: #f1f5f9;
}

.feature-card-image img {
  width: 100%;
  height: 100%;
  min-height: 240px;
  display: block;
  object-fit: cover;
}

.feature-card-content {
  padding: 1.75rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.feature-card-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 0.5rem;
}

.feature-card-content p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .feature-card {
    grid-template-columns: 1fr;
  }

  .feature-card:nth-child(even) .feature-card-image,
  .feature-card:nth-child(even) .feature-card-content {
    order: unset;
  }

  .feature-card-image img {
    min-height: 200px;
  }
}

/* ===== Bénéfices grid ===== */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.benefit-block {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.35rem 1.5rem;
  box-shadow: var(--shadow-card);
}

.benefit-block h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 0.75rem;
}

.benefit-block ul {
  margin: 0;
  padding: 0 0 0 1.25rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.benefit-block li {
  margin-bottom: 0.35rem;
}

.conformite-block {
  background: #f0fdfa;
  border: 1px solid rgba(13, 148, 136, 0.2);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
}

.conformite-block h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 0.5rem;
}

.conformite-block p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

@media (max-width: 640px) {
  .benefits-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Confiance ===== */
.section-confiance {
  background: #f8fafc;
}

.confiance-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.confiance-card {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

.confiance-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.confiance-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

@media (max-width: 640px) {
  .confiance-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Contact ===== */
.section-contact {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.section-contact .section-title {
  color: var(--color-text-on-dark);
}

.section-contact .section-intro {
  color: rgba(241, 245, 249, 0.85);
}

.contact-block {
  text-align: center;
  max-width: 32rem;
  margin: 0 auto;
}

.contact-email {
  display: inline-block;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  margin-bottom: 1.5rem;
}

.contact-email:hover {
  text-decoration: underline;
}

.contact-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.section-contact .btn-secondary {
  color: var(--color-text-on-dark);
  border-color: rgba(255, 255, 255, 0.45);
}

.section-contact .btn-secondary:hover {
  border-color: white;
  color: white;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg-darker);
  color: var(--color-text-on-dark);
  padding: 2rem 1.5rem;
}

.footer-inner {
  text-align: center;
}

.footer-brand {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.footer-nav a {
  color: rgba(241, 245, 249, 0.8);
  text-decoration: none;
  font-size: 0.9375rem;
}

.footer-nav a:hover {
  color: white;
}

.footer-legal {
  font-size: 0.8125rem;
  color: rgba(241, 245, 249, 0.5);
  margin: 0;
}