/* Uhai Océan — palette alignée sur le logo (vert algue, bleu océan, accent corail) */
:root {
  --ocean-abyss: #061525;
  --ocean-deep: #0c2744;
  --ocean-mid: #153a5c;
  --wave-blue: #76a5d1;
  --foam: #b8d4ea;
  --seaweed: #8da76d;
  --seaweed-dark: #6d8554;
  --coral: #e8a078;
  --coral-hover: #f0b896;
  --text: #f2f7fb;
  --text-muted: rgba(242, 247, 251, 0.78);
  --glass: rgba(12, 39, 68, 0.55);
  --glass-border: rgba(184, 212, 234, 0.22);
  --radius: 14px;
  --radius-lg: 22px;
  --font-sans: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --header-h: 72px;
  --ease: cubic-bezier(0.33, 1, 0.68, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--ocean-abyss);
  background-image:
    radial-gradient(ellipse 120% 80% at 50% -20%, rgba(118, 165, 209, 0.35), transparent 55%),
    radial-gradient(ellipse 90% 50% at 100% 50%, rgba(141, 167, 109, 0.12), transparent 45%),
    radial-gradient(ellipse 70% 40% at 0% 80%, rgba(21, 58, 92, 0.5), transparent 50%),
    linear-gradient(175deg, var(--ocean-deep) 0%, var(--ocean-abyss) 45%, #040d18 100%);
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320'%3E%3Cpath fill='%2376a5d1' fill-opacity='0.08' d='M0,192L48,197.3C96,203,192,213,288,229.3C384,245,480,267,576,250.7C672,235,768,181,864,181.3C960,181,1056,235,1152,234.7C1248,235,1344,181,1392,154.7L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z'/%3E%3C/svg%3E");
  background-repeat: repeat-x;
  background-size: 1440px 320px;
  background-position: bottom;
  animation: wave-drift 80s linear infinite;
}

@keyframes wave-drift {
  from {
    background-position-x: 0;
  }
  to {
    background-position-x: 1440px;
  }
}

a {
  color: var(--foam);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 0.2s var(--ease);
}

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

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  padding: 0.75rem 1.25rem;
  background: var(--wave-blue);
  color: var(--ocean-abyss);
  font-weight: 600;
  border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
  left: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(6, 21, 37, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--glass-border);
}

.header-inner {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text);
}

.brand:hover {
  color: var(--text);
}

.brand img {
  width: 48px;
  height: auto;
}

.brand-text {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.brand-text span {
  color: var(--wave-blue);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 0.5rem;
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text);
}

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

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  align-items: center;
}

.site-nav a {
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--seaweed);
}

main {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.hero {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: min(72vh, 520px);
  display: flex;
  align-items: flex-end;
  padding: 2.5rem;
  margin-bottom: 3rem;
  border: 1px solid var(--glass-border);
  background:
    linear-gradient(120deg, rgba(6, 21, 37, 0.92) 0%, rgba(12, 39, 68, 0.75) 45%, rgba(6, 21, 37, 0.55) 100%),
    url("../img/algue2.png") center 30% / cover no-repeat;
}

.hero-inner {
  max-width: 640px;
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.35);
}

.hero .lead {
  margin: 0 0 1.5rem;
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 36ch;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.35rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s var(--ease), transform 0.15s var(--ease);
}

.btn:focus-visible {
  outline: 2px solid var(--foam);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--coral);
  color: var(--ocean-abyss);
}

.btn-primary:hover {
  background: var(--coral-hover);
  color: var(--ocean-abyss);
}

.btn-secondary {
  background: rgba(118, 165, 209, 0.2);
  color: var(--foam);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: rgba(118, 165, 209, 0.35);
  color: var(--text);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.section-title {
  margin: 0 0 0.35rem;
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  font-weight: 700;
  color: var(--foam);
}

.section-intro {
  margin: 0 0 1.75rem;
  color: var(--text-muted);
  max-width: 62ch;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 3rem;
}

@media (max-width: 900px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.35rem;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.card:hover {
  border-color: rgba(141, 167, 109, 0.35);
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  color: var(--seaweed);
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.98rem;
}

.page-hero {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--glass-border);
}

.page-hero h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
}

.page-hero p {
  margin: 0;
  color: var(--text-muted);
  max-width: 58ch;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  margin-bottom: 3rem;
}

@media (max-width: 800px) {
  .split {
    grid-template-columns: 1fr;
  }
}

.split img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

.prose {
  color: var(--text-muted);
}

.prose p {
  margin: 0 0 1rem;
}

.prose p:last-child {
  margin-bottom: 0;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
}

.team-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-align: center;
}

.team-card .photo {
  aspect-ratio: 4 / 5;
  object-fit: cover;
  width: 100%;
  background: var(--ocean-mid);
}

.team-card .body {
  padding: 1rem 1rem 1.25rem;
}

.team-card .role {
  margin: 0 0 0.35rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--wave-blue);
}

.team-card h3 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--text);
}

.team-card .placeholder {
  aspect-ratio: 4 / 5;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, var(--ocean-mid), var(--ocean-deep));
  color: var(--seaweed);
  font-size: 2.5rem;
  font-weight: 700;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

@media (max-width: 700px) {
  .gallery {
    grid-template-columns: 1fr;
  }
}

.gallery figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--glass-border);
}

.gallery figcaption {
  padding: 0.65rem 0.85rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--glass);
}

.event-list article,
.project-list article {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.35rem 1.5rem;
  margin-bottom: 1rem;
}

.event-list .meta,
.project-list .meta {
  font-size: 0.85rem;
  color: var(--wave-blue);
  margin-bottom: 0.35rem;
}

.event-list h3,
.project-list h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  color: var(--text);
}

.event-list p,
.project-list p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.98rem;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 800px) {
  .contact-layout {
    grid-template-columns: 1fr;
  }
}

.contact-form label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--foam);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  margin-bottom: 1rem;
  padding: 0.65rem 0.85rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
  background: rgba(6, 21, 37, 0.6);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--seaweed);
  box-shadow: 0 0 0 3px rgba(141, 167, 109, 0.25);
}

.contact-form textarea {
  min-height: 140px;
  resize: vertical;
}

.site-footer {
  position: relative;
  z-index: 1;
  margin-top: 2rem;
  padding: 2rem 1.25rem;
  border-top: 1px solid var(--glass-border);
  background: rgba(4, 13, 24, 0.85);
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.footer-brand img {
  width: 36px;
  height: auto;
  opacity: 0.9;
}

.footer-copy {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.cta-band {
  text-align: center;
  padding: 2.5rem 1.5rem;
  margin-top: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  background: linear-gradient(135deg, rgba(118, 165, 209, 0.12), rgba(141, 167, 109, 0.1));
}

.cta-band h2 {
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
}

.cta-band p {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
}

/* Navigation mobile */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(6, 21, 37, 0.97);
    border-bottom: 1px solid var(--glass-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s var(--ease);
  }

  .site-nav.is-open {
    max-height: 320px;
  }

  .site-nav ul {
    flex-direction: column;
    padding: 1rem 1.25rem 1.25rem;
    align-items: flex-start;
  }

  .hero {
    padding: 1.5rem;
    min-height: min(65vh, 440px);
  }
}