/* UTIP - Ultra Trail de l'île de Puteaux */
:root {
  --earth: #2d2a26;
  --bark: #4a4035;
  --moss: #3d5a4a;
  --forest: #2d4a3e;
  --sand: #e8e0d5;
  --cream: #f5f0e8;
  --accent: #c17f59;
  --accent-light: #d4a574;
  --white: #fafaf8;
  --shadow: rgba(45, 42, 38, 0.15);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "DM Sans", system-ui, sans-serif;
  color: var(--earth);
  background: var(--cream);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: "Outfit", system-ui, sans-serif;
  font-weight: 700;
  line-height: 1.2;
}

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

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  background: rgba(245, 240, 232, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--shadow);
}
.site-header nav {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.site-header .logo {
  font-family: "Outfit", sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.02em;
  color: var(--earth);
}
.site-header .logo span {
  color: var(--moss);
}
.site-header ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}
.site-header a {
  font-weight: 500;
  color: var(--earth);
}

/* Language switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.9rem;
  font-weight: 600;
}
.lang-switcher button {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  color: var(--bark);
  font-family: inherit;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
}
.lang-switcher button:hover {
  color: var(--moss);
}
.lang-switcher button[aria-current="true"] {
  color: var(--moss);
  background: rgba(61, 90, 74, 0.12);
}
.lang-switcher .sep {
  color: var(--shadow);
  font-weight: 400;
}

/* Bilingual content: French by default */
.lang-en {
  display: none;
}
html[lang="en"] .lang-fr {
  display: none !important;
}
html[lang="en"] .lang-en {
  display: block !important;
}
html[lang="en"] .lang-en.inline {
  display: inline !important;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 6rem 2rem 4rem;
  background: linear-gradient(160deg, var(--forest) 0%, var(--moss) 40%, var(--bark) 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0L30 60M0 30L60 30' stroke='rgba(255,255,255,0.04)' stroke-width='1'/%3E%3C/svg%3E");
  pointer-events: none;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 20px rgba(0,0,0,0.2);
}
.hero .tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  opacity: 0.95;
  margin-bottom: 2rem;
  font-weight: 500;
}
.hero .date-badge {
  display: inline-block;
  background: var(--accent);
  color: var(--white);
  padding: 0.6rem 1.4rem;
  border-radius: 2rem;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
  letter-spacing: 0.02em;
}
.hero .cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--white);
  color: var(--forest);
  padding: 0.9rem 1.8rem;
  border-radius: 2rem;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
}
.hero .cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  color: var(--forest);
}

/* Sections */
section {
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 2rem;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin-bottom: 2rem;
  color: var(--earth);
  position: relative;
  padding-bottom: 0.75rem;
}
.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 4rem;
  height: 4px;
  background: var(--accent);
  border-radius: 2px;
}

/* Concept */
.concept {
  background: var(--white);
  box-shadow: 0 4px 24px var(--shadow);
}
.concept-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.5rem;
}
.concept-card {
  background: var(--cream);
  border-radius: 12px;
  padding: 1.5rem 1.75rem;
  border-left: 4px solid var(--moss);
}
.concept-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  color: var(--forest);
}
.concept-card p {
  color: var(--bark);
  font-size: 0.98rem;
}
.concept .highlight {
  background: linear-gradient(135deg, var(--moss), var(--forest));
  color: var(--white);
  padding: 1.5rem 1.75rem;
  border-radius: 12px;
  margin-top: 1.5rem;
  font-weight: 600;
  text-align: center;
}

.concept-origin {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--cream);
  border-radius: 12px;
  border: 1px solid rgba(61, 90, 74, 0.2);
}
.concept-origin h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  color: var(--forest);
}
.concept-origin p {
  color: var(--bark);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Parcours */
.parcours .loop-info {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.parcours .stat {
  background: var(--earth);
  color: var(--cream);
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
}
.parcours .stat span {
  color: var(--accent-light);
  font-size: 1.25rem;
}
.parcours p {
  color: var(--bark);
  margin-bottom: 1rem;
}
.parcours-figure {
  margin: 2rem 0;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px var(--shadow);
}
.parcours-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 900px;
  margin: 0 auto;
}
.parcours-figure figcaption {
  padding: 0.75rem 0;
  font-size: 0.9rem;
  color: var(--bark);
  text-align: center;
}

/* Lieu / Galerie photos */
.lieu {
  background: var(--cream);
}
.lieu-intro {
  color: var(--bark);
  margin-bottom: 1.5rem;
}
.lieu-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}
.lieu-gallery figure {
  margin: 0;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 16px var(--shadow);
  background: var(--white);
}
.lieu-gallery img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.lieu-gallery figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--forest);
}

/* Pourquoi */
.pourquoi {
  background: var(--white);
  box-shadow: 0 4px 24px var(--shadow);
}
.pourquoi ul {
  list-style: none;
  margin-top: 1rem;
}
.pourquoi li {
  padding: 0.75rem 0;
  padding-left: 2rem;
  position: relative;
  color: var(--bark);
}
.pourquoi li::before {
  content: "◆";
  position: absolute;
  left: 0;
  color: var(--moss);
  font-size: 0.7rem;
  top: 0.9rem;
}

/* Date */
.date-section {
  text-align: center;
  padding: 3rem 2rem;
  background: linear-gradient(135deg, var(--moss), var(--forest));
  color: var(--white);
}
.date-section .section-title {
  color: var(--white);
}
.date-section .section-title::after {
  background: var(--accent-light);
}
.date-section .date-value {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.date-section p {
  opacity: 0.9;
}

/* Footer */
.site-footer {
  background: var(--earth);
  color: var(--sand);
  padding: 2rem;
  text-align: center;
  font-size: 0.9rem;
}
.site-footer a {
  color: var(--accent-light);
}

/* Contact page */
.page-header {
  padding: 8rem 2rem 4rem;
  background: linear-gradient(160deg, var(--forest), var(--moss));
  color: var(--white);
  text-align: center;
}
.page-header h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 0.5rem;
}
.contact-form-wrap {
  max-width: 560px;
  margin: -2rem auto 4rem;
  padding: 0 2rem;
}
.contact-form {
  background: var(--white);
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 8px 32px var(--shadow);
}
.contact-form label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--earth);
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  margin-bottom: 1.25rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--moss);
}
.contact-form textarea {
  min-height: 140px;
  resize: vertical;
}
.contact-form button {
  width: 100%;
  padding: 1rem;
  background: var(--moss);
  color: var(--white);
  border: none;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}
.contact-form button:hover {
  background: var(--forest);
}

@media (max-width: 600px) {
  .site-header ul {
    gap: 1rem;
  }
  .hero {
    padding: 5rem 1.5rem 3rem;
  }
  section {
    padding: 3rem 1.5rem;
  }
}