/* ==========================================================================
   main.css — Styles communs à toutes les pages
   ========================================================================== */

/* --- Variables CSS -------------------------------------------------------- */
:root {
  --color-primary:     #1a3a5c;
  --color-primary-dark:#0f2540;
  --color-accent:      #2e7db5;
  --color-accent-hover:#1f6095;
  --color-bg:          #f5f6f8;
  --color-bg-white:    #ffffff;
  --color-text:        #1e2b3a;
  --color-text-muted:  #5a6a7a;
  --color-border:      #d8dfe8;
  --color-card-bg:     #ffffff;
  --color-footer-bg:   #0f2540;
  --color-footer-text: #b0c0d0;

  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;

  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;

  --shadow-sm:   0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md:   0 4px 12px rgba(0, 0, 0, 0.10);
  --shadow-lg:   0 8px 24px rgba(0, 0, 0, 0.12);

  --max-width:   1140px;
  --header-h:    64px;
  --section-gap: 80px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul, ol {
  list-style: none;
}

/* --- Typography ----------------------------------------------------------- */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-primary);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.35rem, 3vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.35rem); }
h4 { font-size: 1rem; }

p {
  color: var(--color-text-muted);
  max-width: 72ch;
}

/* --- Layout helpers ------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 24px;
}

.section {
  padding-block: var(--section-gap);
}

.section--light {
  background-color: var(--color-bg-white);
}

.section--dark {
  background-color: var(--color-primary);
  color: #ffffff;
}

.section__header {
  margin-bottom: 48px;
}

.section__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.section__title {
  margin-bottom: 14px;
}

.section__desc {
  font-size: 1.05rem;
}

/* --- Buttons -------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
  text-decoration: none;
}

.btn--primary {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #ffffff;
}

.btn--outline {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn--outline:hover {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn--outline-white {
  background-color: transparent;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.6);
}

.btn--outline-white:hover {
  background-color: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.btn--download svg,
.btn svg {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
}

/* --- Header / Navigation -------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  height: var(--header-h);
  background-color: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.header__brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  text-decoration: none;
}

.header__brand-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.header__brand-title {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  font-weight: 400;
  letter-spacing: 0.03em;
}

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

.site-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  transition: color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-accent);
}

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

/* Hamburger mobile */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* --- Footer --------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding-block: 56px 32px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px 32px;
  margin-bottom: 48px;
}

.footer__col-title {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer__brand-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.footer__brand-title {
  font-size: 0.85rem;
  color: var(--color-footer-text);
  margin-bottom: 16px;
  max-width: none;
}

.footer__desc {
  font-size: 0.875rem;
  color: var(--color-footer-text);
  line-height: 1.6;
  max-width: none;
}

.footer__links li {
  margin-bottom: 10px;
}

.footer__links a {
  font-size: 0.875rem;
  color: var(--color-footer-text);
  transition: color 0.2s ease;
}

.footer__links a:hover {
  color: #ffffff;
}

.footer__contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.875rem;
}

.footer__contact-list svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-accent);
}

.footer__contact-list a {
  color: var(--color-footer-text);
}

.footer__contact-list a:hover {
  color: #ffffff;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.8rem;
  color: rgba(176, 192, 208, 0.6);
  flex-wrap: wrap;
}

/* --- CTA Section ---------------------------------------------------------- */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding-block: 64px;
  text-align: center;
}

.cta-section h2 {
  color: #ffffff;
  margin-bottom: 14px;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 1.05rem;
  margin-inline: auto;
  margin-bottom: 32px;
}

.cta-section .btn-group {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Tag badges ----------------------------------------------------------- */
.tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 20px;
  background-color: #e8f0f8;
  color: var(--color-primary);
  border: 1px solid #c8d8ea;
}

/* --- Responsive ----------------------------------------------------------- */
@media (max-width: 900px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  :root {
    --section-gap: 56px;
    --header-h: 58px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background-color: var(--color-bg-white);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 12px 24px;
    width: 100%;
  }

  .header__actions .btn--download {
    display: none;
  }

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

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