/* ============================================
   LES GIVRÉS DU FOREZ — Design tokens
   ============================================ */
:root {
  /* Palette "Nuit polaire" */
  --navy: #1B1B4E;
  --navy-deep: #121238;
  --violet: #3C2A6B;
  --glacier: #7FA8D9;
  --mint: #9CC7B8;
  --pink: #EFC2D2;
  --camel: #C9AD8A;
  --snow: #F7F7F4;
  --ink: #14141F;
  --slate: #6B7280;

  --font-display: 'Bebas Neue', 'Archivo Narrow', sans-serif;
  --font-body: 'Archivo', sans-serif;

  --container-w: 1180px;
  --radius: 4px;
  --ease: cubic-bezier(.4,0,.2,1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--snow);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid var(--glacier);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 28px;
}
.container--narrow { max-width: 760px; }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 30px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .2s var(--ease), background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.btn-primary {
  background: var(--glacier);
  color: var(--navy-deep);
}
.btn-primary:hover {
  background: var(--snow);
  transform: translateY(-2px);
}
.btn-ghost {
  background: transparent;
  border-color: rgba(247,247,244,0.5);
  color: var(--snow);
}
.btn-ghost:hover {
  border-color: var(--snow);
  background: rgba(247,247,244,0.08);
  transform: translateY(-2px);
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(18, 18, 56, 0);
  transition: background .3s var(--ease), box-shadow .3s var(--ease), padding .3s var(--ease);
  padding: 18px 0;
}
.site-header.is-scrolled {
  background: rgba(18, 18, 56, 0.94);
  box-shadow: 0 4px 24px rgba(0,0,0,0.25);
  padding: 10px 0;
  backdrop-filter: blur(8px);
}
.header-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-logo {
  width: 44px;
  height: auto;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.4));
}
.brand-text {
  font-family: var(--font-display);
  color: var(--snow);
  font-size: 1.05rem;
  line-height: 1.05;
  letter-spacing: 0.02em;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.86rem;
  font-weight: 600;
}
.main-nav a {
  color: var(--snow);
  opacity: 0.85;
  transition: opacity .2s, color .2s;
  position: relative;
}
.main-nav a:hover { opacity: 1; color: var(--glacier); }
.nav-cta {
  background: var(--glacier);
  color: var(--navy-deep) !important;
  padding: 9px 18px;
  border-radius: var(--radius);
  opacity: 1 !important;
}
.nav-cta:hover { background: var(--snow) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  width: 100%;
  height: 2px;
  background: var(--snow);
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--navy-deep);
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  filter: grayscale(1) contrast(1.1);
  opacity: 0.55;
}
.hero-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(18,18,56,0.55) 0%, rgba(18,18,56,0.55) 40%, rgba(18,18,56,0.92) 100%),
    linear-gradient(100deg, rgba(27,27,78,0.75) 0%, rgba(60,42,107,0.45) 100%);
}

.hero-ridge {
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 22vh;
  min-height: 140px;
  z-index: 1;
}
.ridge-path { transition: none; }
.ridge-back { fill: var(--violet); opacity: 0.55; }
.ridge-front { fill: var(--navy-deep); }

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--snow);
  padding: 140px 24px 80px;
  max-width: 900px;
}
.hero-eyebrow {
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.85rem;
  color: var(--glacier);
  margin-bottom: 18px;
  opacity: 0;
  animation: fadeUp .7s var(--ease) .1s forwards;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 10vw, 7rem);
  line-height: 0.95;
  letter-spacing: 0.01em;
  margin-bottom: 18px;
  opacity: 0;
  animation: fadeUp .8s var(--ease) .25s forwards;
}
.hero-tagline {
  font-style: italic;
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--camel);
  margin-bottom: 44px;
  font-weight: 500;
  opacity: 0;
  animation: fadeUp .8s var(--ease) .4s forwards;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-countdown {
  display: flex;
  justify-content: center;
  gap: clamp(10px, 3vw, 28px);
  margin-bottom: 48px;
  opacity: 0;
  animation: fadeUp .8s var(--ease) .55s forwards;
}
.cd-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 64px;
}
.cd-num {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  color: var(--snow);
  line-height: 1;
}
.cd-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--glacier);
  margin-top: 6px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp .8s var(--ease) .7s forwards;
}

.scroll-cue {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  width: 26px;
  height: 42px;
  border: 2px solid rgba(247,247,244,0.5);
  border-radius: 14px;
}
.scroll-cue span {
  position: absolute;
  top: 7px;
  left: 50%;
  width: 4px;
  height: 8px;
  margin-left: -2px;
  background: var(--snow);
  border-radius: 2px;
  animation: scrollDown 1.8s ease-in-out infinite;
}
@keyframes scrollDown {
  0% { opacity: 1; transform: translateY(0); }
  70% { opacity: 0; transform: translateY(14px); }
  100% { opacity: 0; transform: translateY(14px); }
}

/* ============================================
   SECTIONS — shared
   ============================================ */
.section {
  padding: 110px 0;
}
.section, #top {
  scroll-margin-top: 84px;
}
.section-eyebrow {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.82rem;
  color: var(--violet);
  margin-bottom: 14px;
}
.section-eyebrow--light { color: var(--glacier); }
.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.05;
  margin-bottom: 22px;
  color: var(--navy-deep);
  letter-spacing: 0.005em;
}
.section-title--light { color: var(--snow); }
.section-lead {
  font-size: 1.15rem;
  color: var(--slate);
  max-width: 680px;
  margin-bottom: 50px;
}
.section-lead--light { color: rgba(247,247,244,0.8); }

/* ============================================
   CONCEPT
   ============================================ */
.concept-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.concept-card {
  background: var(--snow);
  border: 1px solid rgba(27,27,78,0.1);
  border-top: 3px solid var(--glacier);
  padding: 32px 28px;
  border-radius: var(--radius);
}
.concept-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: var(--navy-deep);
  letter-spacing: 0.01em;
}
.concept-card p { color: var(--slate); font-size: 0.98rem; }

/* ============================================
   PARCOURS — altitude profile
   ============================================ */
.parcours { background: linear-gradient(180deg, #fff 0%, var(--snow) 100%); }

.profile-wrap { margin-bottom: 56px; }
.profile-svg {
  width: 100%;
  height: 160px;
  margin-bottom: -10px;
}
.profile-baseline { stroke: rgba(27,27,78,0.15); stroke-width: 1.5; }
.profile-fill { fill: rgba(127,168,217,0.12); }
.profile-line { fill: none; stroke: var(--navy); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.profile-pt { fill: var(--camel); stroke: var(--snow); stroke-width: 3; }

.distance-cards {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}
.distance-card {
  background: #fff;
  border: 1px solid rgba(27,27,78,0.1);
  border-radius: var(--radius);
  padding: 26px 20px;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.distance-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 32px rgba(27,27,78,0.12);
}
.distance-card--max {
  background: var(--navy-deep);
  color: var(--snow);
  border-color: var(--navy-deep);
}
.distance-card--max h3 { color: var(--snow); }
.distance-card--max p { color: rgba(247,247,244,0.75); }
.distance-card--max .distance-km { color: var(--camel); }
.distance-km {
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--navy);
  display: block;
  line-height: 1;
}
.distance-km small { font-size: 1.1rem; font-weight: 400; }
.distance-card h3 {
  font-size: 1.05rem;
  margin: 10px 0 8px;
  font-weight: 700;
}
.distance-card p { font-size: 0.88rem; color: var(--slate); }

.kids-banner {
  margin-top: 48px;
  background: var(--pink);
  border-radius: var(--radius);
  padding: 36px 40px;
}
.kids-text h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--navy-deep);
  margin-bottom: 10px;
}
.kids-text p { color: var(--navy-deep); opacity: 0.85; max-width: 640px; }

.parcours-note {
  margin-top: 28px;
  font-size: 0.85rem;
  color: var(--slate);
  font-style: italic;
}

/* ============================================
   EXPERIENCE
   ============================================ */
.exp-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 64px;
}
.exp-grid--reverse .exp-photo { order: 2; }
.exp-grid--reverse .exp-text { order: 1; }
.exp-photo {
  overflow: hidden;
  border-radius: var(--radius);
}
.exp-photo img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}
.exp-text h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--navy-deep);
  margin-bottom: 16px;
}
.exp-text p { color: var(--slate); font-size: 1.05rem; }

.safety-strip {
  border-left: 4px solid var(--camel);
  background: var(--snow);
  padding: 20px 28px;
  font-size: 0.95rem;
  color: var(--navy-deep);
}

/* ============================================
   CHALLENGE ENTREPRISE
   ============================================ */
.entreprises {
  background: var(--navy-deep);
  background-image: radial-gradient(circle at 85% 20%, rgba(127,168,217,0.18), transparent 55%);
}
.challenge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 48px;
}
.challenge-rule {
  border: 1px solid rgba(247,247,244,0.15);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
}
.challenge-num {
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--glacier);
  display: block;
  margin-bottom: 12px;
}
.challenge-rule p { color: rgba(247,247,244,0.85); font-size: 0.98rem; }

/* ============================================
   PARTENAIRES
   ============================================ */
.sponsor-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 36px;
}
.sponsor-slot {
  aspect-ratio: 16/9;
  border: 2px dashed rgba(27,27,78,0.2);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(27,27,78,0.35);
  font-size: 0.85rem;
  font-weight: 600;
}
.sponsor-cta-text {
  color: var(--slate);
  font-size: 1rem;
}
.sponsor-cta-text a {
  color: var(--violet);
  font-weight: 700;
  text-decoration: underline;
}

/* ============================================
   ASSOCIATION
   ============================================ */
.assoc-content p {
  color: var(--slate);
  font-size: 1.05rem;
  margin-bottom: 18px;
}
.bureau {
  display: flex;
  gap: 20px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.bureau-card {
  background: #fff;
  border: 1px solid rgba(27,27,78,0.1);
  border-left: 3px solid var(--violet);
  padding: 18px 24px;
  border-radius: var(--radius);
  min-width: 220px;
}
.bureau-role {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--violet);
  margin-bottom: 6px;
  font-weight: 700;
}
.bureau-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--navy-deep);
}

/* ============================================
   CONTACT
   ============================================ */
.contact { background: var(--snow); }
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 48px;
}
.form-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form-row label {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--navy-deep);
}
.form-row input,
.form-row select,
.form-row textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 13px 16px;
  border: 1.5px solid rgba(27,27,78,0.2);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  transition: border-color .2s;
}
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: var(--glacier);
  outline: none;
}
.contact-form .btn { align-self: flex-start; margin-top: 8px; }
.form-note {
  font-size: 0.92rem;
  color: #2f7d5e;
  font-weight: 600;
}
.form-note.is-error { color: #c0392b; }

.contact-direct {
  border-top: 1px solid rgba(27,27,78,0.12);
  padding-top: 32px;
  color: var(--slate);
}
.contact-direct p { margin-bottom: 10px; }
.contact-direct a { color: var(--violet); font-weight: 700; }

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--navy-deep);
  color: var(--snow);
  padding: 56px 0 36px;
  text-align: center;
}
.footer-logo { width: 64px; margin: 0 auto 16px; }
.footer-tagline {
  font-style: italic;
  color: var(--camel);
  margin-bottom: 10px;
}
.footer-meta {
  font-size: 0.88rem;
  color: rgba(247,247,244,0.6);
  margin-bottom: 18px;
}
.footer-copy {
  font-size: 0.78rem;
  color: rgba(247,247,244,0.4);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 980px) {
  .concept-grid { grid-template-columns: 1fr; }
  .distance-cards { grid-template-columns: repeat(3, 1fr); }
  .distance-cards .distance-card:nth-child(4) { grid-column: span 1; }
  .challenge-grid { grid-template-columns: 1fr; }
  .exp-grid { grid-template-columns: 1fr; gap: 28px; }
  .exp-grid--reverse .exp-photo { order: 1; }
  .exp-grid--reverse .exp-text { order: 2; }
  .exp-photo img { height: 320px; }
  .sponsor-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .main-nav {
    position: fixed;
    top: 0; right: 0;
    height: 100vh;
    width: min(78vw, 320px);
    background: var(--navy-deep);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: 28px;
    padding: 40px;
    transform: translateX(100%);
    transition: transform .35s var(--ease);
    font-size: 1.1rem;
  }
  .main-nav.is-open { transform: translateX(0); }
  .nav-toggle { display: flex; }
  .nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.is-open span:nth-child(2) { opacity: 0; }
  .nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .section { padding: 76px 0; }
  .distance-cards { grid-template-columns: repeat(2, 1fr); }
  .hero-countdown { gap: 14px; }
  .cd-unit { min-width: 52px; }
  .bureau { flex-direction: column; }
  .sponsor-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .distance-cards { grid-template-columns: 1fr 1fr; }
  .hero-content { padding: 120px 20px 70px; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; }
}