@import url("tokens.css");
@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&family=Source+Sans+3:wght@300;400;600&display=swap");

/* a11y override: darken teal to WCAG AA ≥ 4.5:1 on white (#0a766e ≈ 5.3:1) */
:root { --color-accent: #0a766e; }

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

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

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

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── Typography ── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
}
h1 { font-size: clamp(1.75rem, 5vw, 2.75rem); }
h2 { font-size: clamp(1.4rem, 3.5vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.375rem); }
h4 { font-size: 1rem; }
p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* ── Layout ── */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

section { padding: 4rem 0; }

/* ── Visual placeholders ── */
.visual-placeholder {
  display: block;
  width: 100%;
  border-radius: 8px;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--color-primary) 22%, var(--color-bg)) 0%,
      color-mix(in srgb, var(--color-primary) 10%, var(--color-bg)) 55%,
      color-mix(in srgb, var(--color-secondary) 18%, var(--color-bg)) 100%
    );
}
.visual-placeholder[data-aspect="4:3"]  { aspect-ratio: 4 / 3; }
.visual-placeholder[data-aspect="1:1"]  { aspect-ratio: 1 / 1; }
.visual-placeholder[data-aspect="3:4"]  { aspect-ratio: 3 / 4; }
.visual-placeholder[data-aspect="21:9"] { aspect-ratio: 21 / 9; }

.visual-placeholder[data-tone="secondary"] {
  background:
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--color-secondary) 22%, var(--color-bg)) 0%,
      color-mix(in srgb, var(--color-secondary) 10%, var(--color-bg)) 55%,
      color-mix(in srgb, var(--color-primary) 16%, var(--color-bg)) 100%
    );
}
.visual-placeholder[data-tone="accent"] {
  background:
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--color-accent, var(--color-primary)) 22%, var(--color-bg)) 0%,
      color-mix(in srgb, var(--color-primary) 12%, var(--color-bg)) 60%,
      color-mix(in srgb, var(--color-secondary) 16%, var(--color-bg)) 100%
    );
}
.visual-placeholder[data-tone="muted"] {
  background: color-mix(in srgb, var(--color-text) 8%, var(--color-bg));
}

/* ── Header & nav ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 12%, var(--color-bg));
  box-shadow: 0 2px 12px rgba(30,58,138,0.08);
  transition: box-shadow 0.3s;
}
.site-header.scrolled { box-shadow: 0 4px 20px rgba(30,58,138,0.14); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1.25rem;
  max-width: 1100px;
  margin: 0 auto;
}

.logo-link { display: flex; align-items: center; }
.logo-link img, .logo-link svg { height: 44px; width: auto; }

.nav-list {
  display: flex;
  gap: 2rem;
  align-items: center;
}
.nav-list a {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}
.nav-list a:hover, .nav-list a[aria-current="page"] {
  border-bottom-color: var(--color-accent);
  color: var(--color-accent);
}
.nav-cta {
  background: var(--color-accent);
  color: #fff !important;
  border: none !important;
  border-radius: 6px;
  padding: 0.5rem 1.125rem !important;
  transition: background 0.2s, transform 0.15s !important;
}
.nav-cta:hover { background: color-mix(in srgb, var(--color-accent) 85%, #000) !important; transform: translateY(-1px); }

/* Burger */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 200;
}
.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: transform 0.3s, opacity 0.3s;
  border-radius: 2px;
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
@media (max-width: 768px) {
  .burger { display: flex; }
  .main-nav {
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 2rem;
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 150;
  }
  .main-nav.open { transform: translateX(0); }
  .nav-list { flex-direction: column; gap: 1.5rem; text-align: center; }
  .nav-list a { font-size: 1.25rem; }
}

/* ── Hero ── */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 85vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, color-mix(in srgb, var(--color-primary) 80%, var(--color-accent)) 100%);
  color: #fff;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, color-mix(in srgb, var(--color-accent) 25%, transparent) 0%, transparent 70%);
  pointer-events: none;
}
.hero-parallax-bg {
  position: absolute;
  inset: -10%;
  background:
    radial-gradient(circle at 20% 80%, color-mix(in srgb, var(--color-accent) 15%, transparent) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, color-mix(in srgb, var(--color-secondary) 10%, transparent) 0%, transparent 50%);
  will-change: transform;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}
.hero-tagline {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(13,148,136,0.12);
  border: 1px solid rgba(13,148,136,0.3);
  border-radius: 100px;
  padding: 0.3rem 1rem;
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(20px);
}
.hero h1 {
  color: #fff;
  margin-bottom: 1.25rem;
  opacity: 0;
  transform: translateY(30px);
}
.hero-intro {
  font-size: 1.1rem;
  opacity: 0;
  transform: translateY(30px);
  color: rgba(255,255,255,0.88);
  margin-bottom: 2rem;
  max-width: 560px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  opacity: 0;
  transform: translateY(20px);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 8px;
  padding: 0.75rem 1.75rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s, box-shadow 0.2s;
  text-decoration: none;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.15); }
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-primary:hover { background: color-mix(in srgb, var(--color-accent) 85%, #000); }
.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; }
.btn-outline-dark {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline-dark:hover { background: var(--color-primary); color: #fff; }

/* ── Engagements / Cards ── */
.engagements { background: color-mix(in srgb, var(--color-primary) 4%, var(--color-bg)); }
.engagements-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2.5rem;
}
.engagement-card {
  background: var(--color-bg);
  border-radius: 12px;
  padding: 2rem;
  border: 1px solid color-mix(in srgb, var(--color-primary) 10%, var(--color-bg));
  box-shadow: 0 2px 12px rgba(30,58,138,0.06);
  opacity: 0;
  transform: translateY(24px);
  transition: box-shadow 0.3s, transform 0.3s;
}
.engagement-card:hover { box-shadow: 0 8px 30px rgba(30,58,138,0.12); transform: translateY(-2px); }
.engagement-card.visible { opacity: 1; transform: translateY(0); }
.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--color-accent) 12%, var(--color-bg));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}
.card-icon svg { width: 24px; height: 24px; stroke: var(--color-accent); fill: none; stroke-width: 2; }
.engagement-card h3 { color: var(--color-primary); margin-bottom: 0.5rem; }

/* ── Section titles ── */
.section-eyebrow {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}
.section-title { margin-bottom: 1rem; }
.section-intro { color: color-mix(in srgb, var(--color-text) 70%, var(--color-bg)); max-width: 600px; font-size: 1.05rem; }

/* ── Services ── */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2.5rem;
}
.service-card {
  border-radius: 12px;
  overflow: hidden;
  background: var(--color-bg);
  border: 1px solid color-mix(in srgb, var(--color-primary) 10%, var(--color-bg));
  box-shadow: 0 2px 10px rgba(30,58,138,0.06);
  opacity: 0;
  transform: translateY(24px);
  transition: box-shadow 0.3s, transform 0.3s;
}
.service-card.visible { opacity: 1; transform: translateY(0); }
.service-card:hover { box-shadow: 0 8px 30px rgba(30,58,138,0.12); transform: translateY(-2px); }
.service-card-body { padding: 1.5rem; }
.service-card h3 { color: var(--color-primary); margin-bottom: 0.5rem; }
.service-card ul { margin-top: 0.75rem; padding-left: 0; }
.service-card li {
  padding: 0.35rem 0;
  padding-left: 1.25rem;
  position: relative;
  font-size: 0.95rem;
  color: color-mix(in srgb, var(--color-text) 80%, var(--color-bg));
}
.service-card li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 0.9rem;
}

/* ── À-propos page ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
  margin-top: 2rem;
}
.about-content h2 { margin-bottom: 1rem; }
.about-content p { color: color-mix(in srgb, var(--color-text) 80%, var(--color-bg)); }

/* ── Testimonials ── */
.testimonials { background: color-mix(in srgb, var(--color-primary) 4%, var(--color-bg)); }
.testimonials-note {
  color: color-mix(in srgb, var(--color-text) 60%, var(--color-bg));
  font-size: 0.95rem;
  margin-top: 1rem;
}
.testimonials-cta { margin-top: 1.5rem; }

/* ── CTA band ── */
.cta-band {
  background: linear-gradient(135deg, var(--color-primary) 0%, color-mix(in srgb, var(--color-primary) 80%, var(--color-accent)) 100%);
  color: #fff;
  text-align: center;
  padding: 4rem 1.25rem;
}
.cta-band h2 { color: #fff; margin-bottom: 1rem; }
.cta-band p { color: rgba(255,255,255,0.85); margin-bottom: 2rem; }
.cta-band .cta-actions { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }

/* ── Contact ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-top: 2rem;
}
.contact-info h3 { color: var(--color-primary); margin-bottom: 1rem; }
.contact-item {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}
.contact-item svg { flex-shrink: 0; width: 22px; height: 22px; stroke: var(--color-accent); fill: none; stroke-width: 2; margin-top: 2px; }
.contact-item-label { font-weight: 600; font-family: var(--font-display); font-size: 0.85rem; color: var(--color-accent); margin-bottom: 0.2rem; }
.contact-item a { color: var(--color-primary); }
.contact-item a:hover { text-decoration: underline; }

.map-wrapper {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--color-primary) 12%, var(--color-bg));
  margin-top: 1.5rem;
}
.map-wrapper iframe { display: block; width: 100%; height: 260px; border: 0; }

/* Form */
.contact-form { display: flex; flex-direction: column; gap: 1.25rem; }
.field-group { display: flex; flex-direction: column; gap: 0.4rem; }
.field-group label { font-family: var(--font-display); font-size: 0.85rem; font-weight: 600; color: var(--color-primary); }
.field-group input, .field-group select, .field-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid color-mix(in srgb, var(--color-primary) 25%, var(--color-bg));
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
}
.field-group input:focus, .field-group select:focus, .field-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 15%, transparent);
}
.field-group textarea { resize: vertical; min-height: 120px; }
.field-note { font-size: 0.8rem; color: color-mix(in srgb, var(--color-text) 55%, var(--color-bg)); margin-top: 0.25rem; }
.form-rgpd {
  font-size: 0.8rem;
  color: color-mix(in srgb, var(--color-text) 55%, var(--color-bg));
  line-height: 1.5;
  padding: 1rem;
  background: color-mix(in srgb, var(--color-primary) 4%, var(--color-bg));
  border-radius: 8px;
}

/* ── Footer ── */
.site-footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.8);
  padding: 3rem 0 1.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.footer-brand .footer-logo { height: 44px; width: auto; filter: brightness(0) invert(1); margin-bottom: 0.75rem; }
.footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.65); }
.footer-nav h4 { color: #fff; font-family: var(--font-display); font-size: 0.85rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 0.75rem; }
.footer-nav ul li { margin-bottom: 0.5rem; }
.footer-nav ul li a { font-size: 0.9rem; color: rgba(255,255,255,0.7); transition: color 0.2s; }
.footer-nav ul li a:hover { color: var(--color-accent); }
.footer-contact a { color: var(--color-accent); font-weight: 600; }
.footer-contact address { font-style: normal; font-size: 0.9rem; line-height: 1.6; }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.5rem;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.45);
}
.footer-bottom a { color: rgba(255,255,255,0.55); transition: color 0.2s; }
.footer-bottom a:hover { color: #fff; }

/* ── Breadcrumb ── */
.breadcrumb {
  padding: 1rem 0;
  font-size: 0.85rem;
  color: color-mix(in srgb, var(--color-text) 55%, var(--color-bg));
}
.breadcrumb a { color: var(--color-accent); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { margin: 0 0.4rem; }

/* ── Page hero (inner pages) ── */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, color-mix(in srgb, var(--color-primary) 80%, var(--color-accent)) 100%);
  color: #fff;
  padding: 4rem 0 3rem;
}
.page-hero h1 { color: #fff; margin-bottom: 0.75rem; }
.page-hero .lead { color: rgba(255,255,255,0.85); font-size: 1.1rem; max-width: 600px; }

/* ── Visibility animation states ── */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-up.visible { opacity: 1; transform: none; }

/* ── Skip link ── */
.skip-link {
  position: absolute;
  left: -100vw;
  top: 1rem;
  background: var(--color-accent);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 0 6px 6px 0;
  font-weight: 600;
  z-index: 9999;
  transition: left 0.2s;
}
.skip-link:focus { left: 0; }

/* ── Tablet ── */
@media (min-width: 640px) {
  .engagements-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── Desktop ── */
@media (min-width: 1024px) {
  section { padding: 5.5rem 0; }
  .engagements-grid { grid-template-columns: repeat(3, 1fr); }
  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .about-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
  .hero-content { padding: 5rem 0; }
}

/* ── Animation pass WEB-1448 ── */
@keyframes reveal-up {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: none; }
}
@keyframes reveal-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* CSS scroll-driven reveals — Chromium 115+ / Safari 18+ progressive enhancement */
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .section-eyebrow {
      animation: reveal-up 0.5s ease both;
      animation-timeline: view();
      animation-range: entry 0% entry 30%;
    }
    .section-title {
      animation: reveal-up 0.6s ease both;
      animation-timeline: view();
      animation-range: entry 0% entry 32%;
    }
    .section-intro {
      animation: reveal-up 0.55s ease 0.1s both;
      animation-timeline: view();
      animation-range: entry 0% entry 32%;
    }
    .page-hero h1 {
      animation: reveal-up 0.5s ease both;
      animation-timeline: view();
      animation-range: entry 0% entry 25%;
    }
    .page-hero .lead {
      animation: reveal-up 0.5s ease 0.15s both;
      animation-timeline: view();
      animation-range: entry 0% entry 30%;
    }
    .cta-band h2 {
      animation: reveal-up 0.55s ease both;
      animation-timeline: view();
      animation-range: entry 0% entry 28%;
    }
    .cta-band p {
      animation: reveal-up 0.55s ease 0.15s both;
      animation-timeline: view();
      animation-range: entry 0% entry 30%;
    }
    .cta-band .cta-actions {
      animation: reveal-up 0.55s ease 0.3s both;
      animation-timeline: view();
      animation-range: entry 0% entry 30%;
    }
    .visual-placeholder {
      animation: reveal-fade 0.55s ease both;
      animation-timeline: view();
      animation-range: entry 0% entry 35%;
    }
  }
}

@media (prefers-reduced-motion: no-preference) {
  /* Visual placeholder hover lift */
  .visual-placeholder {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    will-change: transform;
  }
  .visual-placeholder:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 28px rgba(30,58,138,0.12);
  }

  /* Enhanced CTA primary shadow on hover */
  .btn-primary:hover {
    box-shadow: 0 8px 28px rgba(10,118,110,0.30);
  }

  /* Nav link underline glide override */
  .nav-list a:not(.nav-cta) {
    border-bottom-color: transparent;
    background-image: linear-gradient(var(--color-accent), var(--color-accent));
    background-repeat: no-repeat;
    background-size: 0% 2px;
    background-position: 0 calc(100% + 1px);
    transition: background-size 0.25s ease, color 0.2s;
  }
  .nav-list a:not(.nav-cta):hover,
  .nav-list a:not(.nav-cta)[aria-current="page"] {
    background-size: 100% 2px;
    color: var(--color-accent);
    border-bottom-color: transparent;
  }

  /* Focus-visible ring — accessible, discret */
  a:focus-visible,
  button:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 3px;
    border-radius: 4px;
    transition: outline-offset 0.15s ease;
  }
  a:focus-visible:not(:focus) {
    outline-offset: 6px;
  }
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.001ms !important; animation-duration: 0.001ms !important; }
  .fade-up, .engagement-card, .service-card { opacity: 1 !important; transform: none !important; }
  .hero-tagline, .hero h1, .hero-intro, .hero-actions { opacity: 1 !important; transform: none !important; }
  .section-eyebrow, .section-title, .section-intro { opacity: 1 !important; transform: none !important; }
  .page-hero h1, .page-hero .lead { opacity: 1 !important; transform: none !important; }
  .cta-band h2, .cta-band p, .cta-band .cta-actions { opacity: 1 !important; transform: none !important; }
  .visual-placeholder { opacity: 1 !important; transform: none !important; }
  html { scroll-behavior: auto; }
}