/* =========================================================
   SEP Consultants — Feuille de style principale
   Charte graphique validée — bleu marine / cyan / institutionnel
   ========================================================= */

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

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-ink);
  background-color: var(--color-white);
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

ul[role="list"], ol[role="list"] { list-style: none; }

/* Le site n'utilise des listes à puces natives que dans le contenu éditorial
   (.article ul), qui définit son propre marqueur visuel. Partout ailleurs
   (nav, footer, cartes, sources) les listes servent de conteneurs de mise
   en page et ne doivent jamais afficher de puces natives. */
nav ul, .site-footer ul, .sources ul, .related-activities__list, .contact-list {
  list-style: none;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  line-height: 1.2;
  font-family: var(--font-display);
  color: var(--color-navy);
}

p, li, figcaption {
  text-wrap: pretty;
}

a {
  color: var(--color-cyan);
  text-decoration: none;
}
a:hover { color: var(--color-cyan-dark); text-decoration: underline; }

::selection {
  background: rgba(0, 187, 230, 0.25);
  color: var(--color-ink);
}

:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 3px;
  border-radius: 3px;
}

button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }

a, button, [role="button"] {
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

/* ---------- Design tokens : couleurs charte SEP Consultants ---------- */
:root {
  /* Couleurs charte (strictes, ne pas dévier) */
  --color-navy: #003876;        /* Bleu marine primaire */
  --color-navy-dark: #00234A;   /* Bleu marine foncé (fonds pleine page) */
  --color-cyan: #00BBE6;        /* Cyan accent / CTA / liens */
  --color-cyan-dark: #0090B3;   /* Cyan hover */
  --color-ink: #1F2A37;         /* Texte principal */
  --color-slate: #5B6B7C;       /* Texte secondaire */
  --color-line: #DCE4EC;        /* Bordures */
  --color-cloud: #F4F7FA;       /* Fonds de section alternés / cartes */
  --color-white: #FFFFFF;
  --color-validation: #2F7A4F;  /* Confirmations (usage restreint) */
  --color-deny: #B3382C;        /* Alertes (rare) */

  /* Typographie */
  --font-display: 'DM Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', Arial, sans-serif;

  /* Échelle typographique (H1 32-40, H2 22-26, H3 17-19, corps 16-18, légendes 12-13) */
  --text-caption: clamp(0.75rem, 0.72rem + 0.1vw, 0.8125rem);   /* 12-13px */
  --text-base: clamp(1rem, 0.96rem + 0.15vw, 1.125rem);         /* 16-18px */
  --text-h3: clamp(1.0625rem, 1rem + 0.25vw, 1.1875rem);        /* 17-19px */
  --text-h2: clamp(1.375rem, 1.25rem + 0.5vw, 1.625rem);        /* 22-26px */
  --text-h1: clamp(2rem, 1.7rem + 1.2vw, 2.5rem);               /* 32-40px */
  --text-hero: clamp(2.25rem, 1.8rem + 1.8vw, 2.75rem);         /* légèrement au-dessus H1 pour le hero */

  /* Espacements (base 4px) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Rayon des boutons/cartes : coins légèrement arrondis */
  --radius-btn: 4px;
  --radius-card: 6px;

  /* Largeurs de contenu */
  --content-max: 1200px;
  --content-narrow: 760px;

  /* Ombres très discrètes (pas d'ombres portées fortes) */
  --shadow-card: 0 1px 3px rgba(0, 35, 74, 0.08);
  --shadow-card-hover: 0 4px 12px rgba(0, 35, 74, 0.12);
}

/* ---------- Layout utilitaires ---------- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--narrow {
  max-width: var(--content-narrow);
}

section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
}

.section--cloud { background-color: var(--color-cloud); }
.section--navy {
  background-color: var(--color-navy-dark);
  color: var(--color-white);
}
.section--navy h1, .section--navy h2, .section--navy h3 { color: var(--color-white); }
.section--navy p { color: rgba(255,255,255,0.86); }
.section--navy a:not(.btn) { color: var(--color-cyan); }

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

.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-caption);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-cyan-dark);
  margin-bottom: var(--space-3);
}
.section--navy .eyebrow { color: var(--color-cyan); }

h1 { font-size: var(--text-h1); font-weight: 700; }
h2 { font-size: var(--text-h2); font-weight: 700; }
h3 { font-size: var(--text-h3); font-weight: 600; }

.section-head {
  max-width: 720px;
  margin-bottom: var(--space-10);
}
.section-head.center {
  margin-inline: auto;
  text-align: center;
}

p { color: var(--color-ink); max-width: 68ch; }
p + p { margin-top: var(--space-4); }
.section--navy p { max-width: 68ch; }

.lede {
  font-size: var(--text-base);
  color: var(--color-slate);
  max-width: 62ch;
}
.section--navy .lede { color: rgba(255,255,255,0.82); }

figcaption, .caption {
  font-size: var(--text-caption);
  color: var(--color-slate);
}

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-base);
  line-height: 1;
  padding: 0.85em 1.6em;
  border-radius: var(--radius-btn);
  border: 1.5px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-navy);
  color: var(--color-white);
  border-color: var(--color-navy);
}
.btn--primary:hover {
  background-color: var(--color-cyan-dark);
  border-color: var(--color-cyan-dark);
  text-decoration: none;
  color: var(--color-white);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}
.btn--secondary:hover {
  background-color: var(--color-navy);
  color: var(--color-white);
  text-decoration: none;
}

.section--navy .btn--secondary,
.hero .btn--secondary,
.page-hero .btn--secondary,
.conclusion-block .btn--secondary {
  color: var(--color-white);
  border-color: var(--color-white);
}
.section--navy .btn--secondary:hover,
.hero .btn--secondary:hover,
.page-hero .btn--secondary:hover,
.conclusion-block .btn--secondary:hover {
  background-color: var(--color-white);
  color: var(--color-navy);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

/* ---------- Header / navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-3);
}

.site-header__logo {
  display: flex;
  align-items: center;
}
.site-header__logo img {
  height: 40px;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}
.main-nav__list li,
.footer-col ul li,
.related-activities__list li,
.contact-list li {
  list-style: none;
}

.main-nav__link {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--text-caption);
  color: var(--color-ink);
  padding: var(--space-2) 0;
  position: relative;
}
.main-nav__link:hover { color: var(--color-cyan-dark); text-decoration: none; }

.main-nav__item {
  position: relative;
}

.main-nav__item--dropdown > .main-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.main-nav__item--dropdown > .main-nav__link::after {
  content: "";
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform 160ms ease;
}
.main-nav__item--dropdown:hover > .main-nav__link::after,
.main-nav__item--dropdown.is-open > .main-nav__link::after {
  transform: rotate(225deg) translateY(1px);
}

.dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 340px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card-hover);
  padding: var(--space-2);
  margin-top: var(--space-3);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(4px);
  transition: opacity 160ms ease, transform 160ms ease, visibility 160ms;
}

.main-nav__item--dropdown:hover .dropdown,
.main-nav__item--dropdown.is-open .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown__link {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-radius: 3px;
  font-size: var(--text-caption);
  color: var(--color-ink);
  font-weight: 500;
}
.dropdown__link:hover {
  background-color: var(--color-cloud);
  color: var(--color-cyan-dark);
  text-decoration: none;
}

.header-cta { display: flex; align-items: center; gap: var(--space-4); }
.header-cta .btn { padding: 0.65em 1.3em; font-size: var(--text-caption); }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-btn);
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-navy);
  position: relative;
  transition: transform 200ms ease, opacity 200ms ease;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

/* ---------- Fil d'Ariane ---------- */
.breadcrumb {
  font-size: var(--text-caption);
  color: var(--color-slate);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--color-line);
}
.breadcrumb a { color: var(--color-slate); }
.breadcrumb a:hover { color: var(--color-cyan-dark); }
.breadcrumb span[aria-current] { color: var(--color-ink); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background-color: var(--color-navy-dark);
  color: var(--color-white);
  overflow: hidden;
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-16);
  align-items: center;
}

.hero h1 {
  font-size: var(--text-hero);
  color: var(--color-white);
  margin-bottom: var(--space-5);
}

.hero .lede { color: rgba(255,255,255,0.85); font-size: var(--text-base); }

.hero__media {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.12);
}
.hero__media img { width: 100%; height: 100%; object-fit: cover; }

.hero__stats {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-10);
  flex-wrap: wrap;
}
.hero__stat-value {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 700;
  color: var(--color-cyan);
  line-height: 1;
}
.hero__stat-label {
  font-size: var(--text-caption);
  color: rgba(255,255,255,0.75);
  margin-top: var(--space-1);
}

/* ---------- Page hero (pages internes, plus compact) ---------- */
.page-hero {
  background-color: var(--color-navy-dark);
  color: var(--color-white);
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}
.page-hero h1 { color: var(--color-white); font-size: var(--text-h1); }
.page-hero .lede { color: rgba(255,255,255,0.85); margin-top: var(--space-4); }
.page-hero__media {
  margin-top: var(--space-10);
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.12);
  max-height: 360px;
}
.page-hero__media img { width: 100%; height: 100%; object-fit: cover; max-height: 360px; }

/* ---------- Cartes activités ---------- */
.activities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.activity-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: box-shadow 200ms ease, transform 200ms ease, border-color 200ms ease;
}
.activity-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
  border-color: var(--color-cyan);
}

.activity-card__media {
  aspect-ratio: 4/3;
  overflow: hidden;
  background-color: var(--color-cloud);
}
.activity-card__media img { width: 100%; height: 100%; object-fit: cover; }

.activity-card__body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.activity-card__number {
  font-family: var(--font-display);
  font-size: var(--text-caption);
  font-weight: 700;
  color: var(--color-cyan-dark);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.activity-card h3 {
  margin-bottom: var(--space-3);
  color: var(--color-navy);
}

.activity-card p {
  color: var(--color-slate);
  font-size: var(--text-caption);
  flex: 1;
}

.activity-card__link {
  margin-top: var(--space-4);
  font-weight: 600;
  font-size: var(--text-caption);
  color: var(--color-cyan-dark);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}
.activity-card__link:hover { text-decoration: none; color: var(--color-navy); }
.activity-card__link::after { content: "→"; transition: transform 160ms ease; }
.activity-card:hover .activity-card__link::after { transform: translateX(3px); }

/* ---------- Pourquoi SEP / feature list ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.feature {
  padding: var(--space-6);
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.feature__icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-navy);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}
.feature__icon svg { width: 22px; height: 22px; stroke: var(--color-white); }

.feature h3 { margin-bottom: var(--space-2); }
.feature p { color: var(--color-slate); font-size: var(--text-caption); }

/* ---------- Contenu éditorial des pages activités ---------- */
.article {
  max-width: var(--content-narrow);
  margin-inline: auto;
}
.article h2 {
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-line);
}
.article > h2:first-child { border-top: none; padding-top: 0; margin-top: 0; }
.article h3 { margin-top: var(--space-6); margin-bottom: var(--space-3); color: var(--color-navy); }
.article p { margin-bottom: var(--space-4); color: var(--color-ink); }
.article ul, .article ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
  color: var(--color-ink);
}
.article li { margin-bottom: var(--space-2); }
.article ul { list-style: none; padding-left: 0; }
.article ul > li {
  position: relative;
  padding-left: var(--space-6);
}
.article ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 7px;
  height: 7px;
  background-color: var(--color-cyan);
  border-radius: 50%;
}
.article .lede-intro {
  font-size: var(--text-base);
  color: var(--color-slate);
  margin-bottom: var(--space-8);
}
.article strong { color: var(--color-navy); font-weight: 600; }

.callout {
  background-color: var(--color-cloud);
  border-left: 3px solid var(--color-cyan);
  border-radius: var(--radius-card);
  padding: var(--space-6);
  margin: var(--space-8) 0;
}
.callout p:last-child { margin-bottom: 0; }

.conclusion-block {
  background-color: var(--color-navy-dark);
  color: var(--color-white);
  border-radius: var(--radius-card);
  padding: var(--space-10);
  margin-top: var(--space-16);
}
.conclusion-block h2 { color: var(--color-white); border-top: none; margin-top: 0; padding-top: 0; }
.conclusion-block p { color: rgba(255,255,255,0.88); }
.conclusion-block .btn-row { margin-top: var(--space-6); }

/* ---------- Sources ---------- */
.sources {
  margin-top: var(--space-20);
  padding-top: var(--space-10);
  border-top: 1px solid var(--color-line);
}
.sources h2 {
  font-size: var(--text-h3);
  margin-bottom: var(--space-4);
  border-top: none;
  padding-top: 0;
  margin-top: 0;
  color: var(--color-slate);
}
.sources ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.sources li {
  font-size: var(--text-caption);
  color: var(--color-slate);
}
.sources a {
  color: var(--color-slate);
  text-decoration: underline;
  text-decoration-color: var(--color-line);
  text-underline-offset: 2px;
}
.sources a:hover { color: var(--color-cyan-dark); text-decoration-color: var(--color-cyan); }
.sources__note {
  margin-top: var(--space-6);
  font-size: var(--text-caption);
  color: var(--color-slate);
  font-style: italic;
}

/* ---------- Related activities (bas de page activité) ---------- */
.related-activities {
  margin-top: var(--space-8);
}
.related-activities__list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}
.related-activities__link {
  display: block;
  padding: var(--space-4);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  font-size: var(--text-caption);
  font-weight: 500;
  color: var(--color-ink);
}
.related-activities__link:hover {
  border-color: var(--color-cyan);
  color: var(--color-cyan-dark);
  text-decoration: none;
  background-color: var(--color-cloud);
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-8);
}
.contact-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}
.contact-item__icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(0,187,230,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-item__icon svg { width: 18px; height: 18px; stroke: var(--color-cyan); }
.contact-item__label {
  font-size: var(--text-caption);
  color: rgba(255,255,255,0.65);
  margin-bottom: 2px;
}
.contact-item__value { font-weight: 500; }
.contact-item__value a { color: var(--color-white); }
.contact-item__value a:hover { color: var(--color-cyan); }

.contact-map-note {
  background-color: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-card);
  padding: var(--space-8);
}
.contact-map-note h3 { color: var(--color-white); margin-bottom: var(--space-3); }
.contact-map-note p { color: rgba(255,255,255,0.8); font-size: var(--text-caption); }

/* ---------- Footer ---------- */
.site-footer {
  background-color: var(--color-navy-dark);
  color: rgba(255,255,255,0.75);
  padding-block: var(--space-16) var(--space-8);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.footer-logo__plate {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-white);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-card);
  margin-bottom: var(--space-4);
}
.footer-logo__plate img { height: 28px; }
.footer-col h4 {
  font-family: var(--font-body);
  font-size: var(--text-caption);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.5);
  margin-bottom: var(--space-4);
  font-weight: 600;
}
.footer-col ul { display: flex; flex-direction: column; gap: var(--space-2); }
.footer-col a { color: rgba(255,255,255,0.75); font-size: var(--text-caption); }
.footer-col a:hover { color: var(--color-cyan); text-decoration: none; }
.footer-col p { font-size: var(--text-caption); color: rgba(255,255,255,0.75); margin-bottom: var(--space-2); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-top: var(--space-6);
  font-size: var(--text-caption);
  color: rgba(255,255,255,0.55);
}
.footer-bottom a { color: rgba(255,255,255,0.55); }
.footer-bottom a:hover { color: var(--color-cyan); }
.footer-bottom__legal { display: flex; gap: var(--space-4); flex-wrap: wrap; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero__grid { grid-template-columns: 1fr; gap: var(--space-10); }
  .activities-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
  .contact-grid { grid-template-columns: 1fr; gap: var(--space-10); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .related-activities__list { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .header-cta .btn--secondary { display: none; }

  .main-nav.is-open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-line);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-4);
    box-shadow: var(--shadow-card-hover);
  }
  .main-nav.is-open .main-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }
  .main-nav.is-open .main-nav__item { width: 100%; }
  .main-nav.is-open .main-nav__link {
    padding: var(--space-3) var(--space-2);
    border-bottom: 1px solid var(--color-line);
    width: 100%;
  }
  .main-nav.is-open .dropdown {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    border: none;
    margin-top: 0;
    display: none;
    width: 100%;
    min-width: 0;
  }
  .main-nav.is-open .main-nav__item--dropdown.is-open .dropdown { display: block; }

  .activities-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .related-activities__list { grid-template-columns: 1fr; }
  .hero__stats { gap: var(--space-6); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  section { padding-block: clamp(var(--space-10), 8vw, var(--space-16)); }
}