/* =========================================================================
   Vertivilla — feuille de style
   Direction : eco-tech premium. Pierre chaude + vert foret + accent vert vivant.
   Police : Inter (auto-hebergee). RTL gere via proprietes logiques.
   ========================================================================= */

/* ---------- Polices auto-hebergees ---------- */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/assets/fonts/inter-latin-wght-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212,
    U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/assets/fonts/inter-latin-ext-wght-normal.woff2") format("woff2");
  unicode-range: U+0100-02AF, U+0300-0301, U+0303-0304, U+0308-0309, U+030C,
    U+0323, U+0329, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113,
    U+2C60-2C7F, U+A720-A7FF;
}
/* Arabe : chargee uniquement sur les futures pages ar (unicode-range arabe) */
@font-face {
  font-family: "Noto Sans Arabic";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/assets/fonts/noto-sans-arabic-arabic-wght-normal.woff2") format("woff2");
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-088E, U+0890-0891,
    U+0898-08E1, U+08E3-08FF, U+FB50-FDFF, U+FE70-FEFF;
}

/* ---------- Tokens ---------- */
:root {
  --paper:        #F1EEE6;   /* pierre chaude, fond principal */
  --paper-2:      #FAF8F3;   /* surface claire */
  --ink:          #16211C;   /* texte principal, quasi noir vert */
  --forest:       #1D3A2B;   /* vert foret, sections sombres */
  --forest-deep:  #12261C;   /* vert tres sombre */
  --accent:       #4E9E77;   /* vert vivant */
  --accent-deep:  #3B8763;
  --mute:         #5E6B61;   /* gris sauge, texte secondaire */
  --on-dark:      #ECEFE8;
  --on-dark-mute: rgba(236, 239, 232, 0.66);
  --line:         rgba(22, 33, 28, 0.14);
  --line-dark:    rgba(236, 239, 232, 0.18);

  --font: "Inter", "Noto Sans Arabic", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;

  --container: 1200px;
  --pad-inline: clamp(1.25rem, 4vw, 3rem);
  --section-y: clamp(3.75rem, 9vw, 7.5rem);
  --radius: 14px;
  --radius-lg: 22px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "cv02", "cv03", "cv04", "ss01";
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.05; letter-spacing: -0.02em; font-weight: 600; text-wrap: balance; }
p { text-wrap: pretty; }

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

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--pad-inline); }
main { display: block; }
.section { padding-block: var(--section-y); }
.section--paper2 { background: var(--paper-2); }
.section--dark { background: var(--forest); color: var(--on-dark); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--on-dark); }

/* ---------- Typographie utilitaire ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.6em;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--accent-deep); margin-block-end: 1.1rem;
}
.eyebrow--light { color: var(--accent); }
.eyebrow .mark {
  inline-size: 0.5rem; block-size: 0.5rem; background: var(--accent);
  transform: rotate(45deg); flex: none;
}
.lede { font-size: clamp(1.1rem, 1rem + 0.6vw, 1.4rem); color: var(--mute); max-width: 46ch; }
.section--dark .lede { color: var(--on-dark-mute); }

/* ---------- Boutons ---------- */
.btn {
  --btn-pad-y: 0.85rem; --btn-pad-x: 1.5rem;
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5em;
  padding: var(--btn-pad-y) var(--btn-pad-x);
  font-weight: 550; font-size: 0.98rem; letter-spacing: -0.01em;
  border-radius: 999px; border: 1px solid transparent; cursor: pointer;
  transition: transform 0.25s var(--ease), background-color 0.25s var(--ease),
              border-color 0.25s var(--ease), color 0.25s var(--ease);
}
.btn--sm { --btn-pad-y: 0.6rem; --btn-pad-x: 1.1rem; font-size: 0.9rem; }
.btn--solid { background: var(--accent); color: #08130D; }
.btn--solid:hover { background: var(--accent-deep); transform: translateY(-2px); }
.btn--ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn--ghost:hover { border-color: var(--ink); transform: translateY(-2px); }
.btn--ghost-light { border-color: var(--line-dark); color: var(--on-dark); background: transparent; }
.btn--ghost-light:hover { border-color: var(--on-dark); transform: translateY(-2px); }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* ---------- Accessibilite ---------- */
.skip-link {
  position: fixed; inset-block-start: -100%; inset-inline-start: 1rem; z-index: 200;
  background: var(--ink); color: var(--on-dark); padding: 0.7rem 1.1rem; border-radius: 8px;
}
.skip-link:focus { inset-block-start: 1rem; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; inset-block-start: 0; z-index: 100;
  background: color-mix(in srgb, var(--paper) 78%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  border-block-end: 1px solid transparent;
  transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease);
}
.site-header.is-scrolled {
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  border-block-end-color: var(--line);
}
.site-header__inner { display: flex; align-items: center; gap: 1.5rem; min-block-size: 68px; }
.brand-block { display: flex; flex-direction: column; align-items: flex-start; gap: 0.45rem; flex: none; }
.brand { display: inline-flex; align-items: center; flex: none; }
.brand__logo { block-size: 26px; width: auto; }
.brand__logo--footer { block-size: 30px; }

.site-nav { display: flex; align-items: center; gap: 1.75rem; margin-inline-start: auto; }
.site-nav__list { display: flex; align-items: center; gap: 0.35rem; list-style: none; padding: 0; }
.site-nav__link {
  display: inline-block; padding: 0.5rem 0.7rem; font-size: 0.92rem; font-weight: 450;
  color: var(--ink); border-radius: 8px; position: relative; white-space: nowrap;
  transition: color 0.2s var(--ease);
}
.site-nav__link:hover { color: var(--accent-deep); }
.site-nav__link.is-current { color: var(--accent-deep); font-weight: 550; }
.site-nav__link.is-current::after {
  content: ""; position: absolute; inset-block-end: 0.15rem;
  inset-inline: 0.7rem; block-size: 2px; background: var(--accent); border-radius: 2px;
}
.site-nav__aside { display: flex; align-items: center; gap: 1rem; }
.lang-switch { display: inline-flex; align-items: center; gap: 0.4rem; }
.lang-switch__item { display: inline-flex; padding: 0.15rem; border-radius: 5px; line-height: 0; transition: transform 0.2s var(--ease); }
.lang-switch__item .flag { inline-size: 24px; block-size: 16px; border-radius: 3px; box-shadow: 0 0 0 1px var(--line); object-fit: cover; }
.lang-switch__item.is-active { box-shadow: 0 0 0 2px var(--accent); }
a.lang-switch__item:hover { transform: translateY(-1px); }
.lang-switch__item.is-soon { opacity: 0.45; cursor: not-allowed; filter: grayscale(0.3); }

.nav-toggle {
  display: none; margin-inline-start: auto; inline-size: 44px; block-size: 44px;
  background: transparent; border: 1px solid var(--line); border-radius: 10px; cursor: pointer;
  align-items: center; justify-content: center;
}
.nav-toggle__bars, .nav-toggle__bars::before, .nav-toggle__bars::after {
  content: ""; display: block; inline-size: 18px; block-size: 2px; background: var(--ink);
  border-radius: 2px; transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before { position: absolute; inset-block-start: -6px; }
.nav-toggle__bars::after { position: absolute; inset-block-start: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 920px) {
  .nav-toggle { display: inline-flex; }
 .site-header__inner { min-block-size: 60px; flex-wrap: wrap; }
.site-nav {
    flex-basis: 100%;
    display: none;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--paper); padding: 0.5rem 0 1rem;
    margin-inline-start: 0;
  }
  .site-nav.is-open { display: flex; }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav__link {
    padding: 0.62rem 0.4rem; font-size: 1rem; font-weight: 500;
    border-block-end: 1px solid var(--line); border-radius: 0;
  }
  .site-nav__link.is-current { color: var(--accent-deep); }
  .site-nav__link.is-current::after { display: none; }
  .site-nav__aside { justify-content: center; margin-block-start: 1rem; }
}
@media (max-width: 920px) and (max-height: 620px) {
  .site-nav__link { padding-block: 0.5rem; font-size: 0.95rem; }
}

/* ---------- Page head (logo + titres + media) ---------- */
.pagehead { padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(2rem, 5vw, 3.25rem); background: var(--paper); }
.pagehead__inner { display: flex; flex-direction: column; align-items: flex-start; }
.pagehead__logo {
 inline-size: clamp(420px, 40vw, 2000px); block-size: auto;
  margin-block-end: clamp(1.75rem, 4.5vw, 2.75rem);
}
.pagehead .eyebrow { margin-block-end: 0.9rem; }
.pagehead h1 {
  font-size: clamp(2.4rem, 1.6rem + 4.6vw, 5.25rem); font-weight: 620;
  letter-spacing: -0.035em; line-height: 1; color: var(--ink);
}
.pagehead h1 .soft { color: var(--mute); font-weight: 500; }
.pagehead__sub {
  margin-block-start: 1.1rem; font-size: clamp(1.1rem, 1rem + 0.85vw, 1.6rem);
  font-weight: 450; color: var(--mute); max-width: 42ch;
}
.pagehead .actions { margin-block-start: 1.75rem; }
.pagehead__media {
  inline-size: 100%; margin-block-start: clamp(2rem, 5vw, 3.5rem);
  border-radius: var(--radius-lg); overflow: hidden; align-self: stretch;
}
.pagehead__media .embed,
.pagehead__media .media { border-radius: var(--radius-lg); margin: 0; }
.pagehead__media .media { aspect-ratio: 16 / 9; }

/* ---------- Sections editoriales ---------- */
.section__head { max-width: 60ch; margin-block-end: clamp(2rem, 4vw, 3.25rem); }
.section__head h2 { font-size: clamp(1.9rem, 1.3rem + 2.6vw, 3.1rem); }
.section__head .lede { margin-block-start: 1rem; }

/* Bloc "feature" : titre + texte + media */
.feature { display: grid; gap: clamp(1.25rem, 3vw, 2.5rem); align-items: start; }
.feature + .feature { margin-block-start: clamp(2.5rem, 6vw, 5rem); }
.feature__head h3 { font-size: clamp(1.4rem, 1.1rem + 1.4vw, 2.1rem); }
.feature__head p { margin-block-start: 0.9rem; color: var(--mute); max-width: 44ch; }
.section--dark .feature__head p { color: var(--on-dark-mute); }

@media (min-width: 800px) {
  .feature--split { grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); align-items: center; }
  .feature--split.is-reversed .feature__head { order: 2; }
}

/* Grille de media */
.media-grid { display: grid; gap: clamp(0.75rem, 2vw, 1.25rem); }
.media-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 560px) { .media-grid--2 { grid-template-columns: 1fr; } }

.media {
  position: relative; overflow: hidden; border-radius: var(--radius);
  background: color-mix(in srgb, var(--forest) 12%, var(--paper));
}
.media img { inline-size: 100%; block-size: 100%; object-fit: cover; }
.media--ratio { aspect-ratio: var(--ratio, 4 / 3); }
.media--contain { background: var(--paper-2); border: 1px solid var(--line); }
.media--contain img { object-fit: contain; padding: 7%; }
.media--tall { aspect-ratio: 3 / 4; }
.media--wide { aspect-ratio: 16 / 10; }

/* Embed video responsive */
.embed { position: relative; aspect-ratio: 16 / 9; border-radius: var(--radius); overflow: hidden; background: var(--forest-deep); }
.embed iframe { position: absolute; inset: 0; inline-size: 100%; block-size: 100%; border: 0; pointer-events: none; }
/* ---------- Partenaires (page samsung) ---------- */
.partners { display: grid; gap: clamp(1rem, 2.5vw, 1.5rem); grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 820px) { .partners { grid-template-columns: 1fr; } }
.partner-card {
  display: flex; flex-direction: column; gap: 0.5rem; padding: clamp(1.5rem, 3vw, 2rem);
  background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius-lg);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}
a.partner-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.partner-card__title { font-size: 1.3rem; font-weight: 600; }
.partner-card__meta { color: var(--mute); font-size: 0.95rem; }
.partner-card__go { margin-block-start: auto; padding-block-start: 1rem; color: var(--accent-deep); font-weight: 550; font-size: 0.92rem; display: inline-flex; align-items: center; gap: 0.4em; }
.partner-card__go::after { content: "\2192"; }
[dir="rtl"] .partner-card__go::after { content: "\2190"; }

/* ---------- Projets ---------- */
.projects { display: grid; gap: clamp(1.5rem, 3.5vw, 2.5rem); grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 760px) { .projects { grid-template-columns: 1fr; } }
.project { display: flex; flex-direction: column; gap: 1rem; }
.project__media { border-radius: var(--radius-lg); overflow: hidden; }
.project h3 { font-size: clamp(1.3rem, 1.1rem + 1vw, 1.7rem); }
.project__place { color: var(--accent-deep); font-weight: 600; font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; }
.project p { color: var(--mute); max-width: 40ch; }

/* ---------- CTA band ---------- */
.cta-band { background: var(--forest); color: var(--on-dark); }
.cta-band__inner { padding-block: clamp(3rem, 7vw, 5.5rem); text-align: center; display: flex; flex-direction: column; align-items: center; }
.cta-band .eyebrow { justify-content: center; }
.cta-band__title { font-size: clamp(2rem, 1.4rem + 3vw, 3.6rem); color: #fff; margin-block-end: 1.75rem; }
.cta-band .actions { justify-content: center; }

/* ---------- Formulaire de contact ---------- */
.contact-layout { display: grid; gap: clamp(2rem, 5vw, 4rem); }
@media (min-width: 900px) { .contact-layout { grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); align-items: start; } }
.contact-aside p { color: var(--mute); margin-block-start: 1rem; max-width: 38ch; }
.contact-aside__mail { margin-block-start: 1.5rem; display: inline-flex; align-items: center; gap: 0.5em; font-weight: 550; color: var(--ink); }

.form { display: grid; gap: 1.1rem; }
.form__row { display: grid; gap: 1.1rem; }
@media (min-width: 560px) { .form__row--2 { grid-template-columns: 1fr 1fr; } }
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field label { font-size: 0.85rem; font-weight: 550; letter-spacing: 0.01em; color: var(--ink); }
.field label .req { color: var(--accent-deep); }
.field .control {
  display: flex; align-items: center; gap: 0.6rem;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 12px;
  padding-inline: 0.9rem; transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.field .control:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
.field .control svg { flex: none; color: var(--mute); }
.field input, .field textarea {
  inline-size: 100%; border: 0; background: transparent; font: inherit; color: var(--ink);
  padding-block: 0.8rem; resize: vertical;
}
.field input:focus, .field textarea:focus { outline: none; }
.field textarea { min-block-size: 120px; }
.form__foot { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; justify-content: space-between; margin-block-start: 0.5rem; }
.form__note { color: var(--mute); font-size: 0.85rem; }
.honeypot { position: absolute; inset-inline-start: -9999px; inline-size: 1px; block-size: 1px; overflow: hidden; }
.form-alert { padding: 0.9rem 1.1rem; border-radius: 10px; font-size: 0.95rem; margin-block-end: 1.25rem; }
.form-alert--ok { background: color-mix(in srgb, var(--accent) 16%, var(--paper-2)); border: 1px solid var(--accent); }
.form-alert--err { background: #fbecea; border: 1px solid #d98a80; color: #7a271f; }

/* ---------- Footer ---------- */
.site-footer { background: var(--forest); color: var(--on-dark); }
.footer-word { font-size: 1.5rem; font-weight: 640; letter-spacing: -0.02em; color: #fff; }
.site-footer__inner { display: grid; gap: 1rem; padding-block: clamp(3rem, 6vw, 4.5rem) 2.5rem; justify-items: center; text-align: center; }
.site-footer__brand { display: flex; flex-direction: column; align-items: center; }
.site-footer__logo { height: 68px; width: auto; }
.site-footer__tagline { color: var(--on-dark-mute); margin-block: 1rem 1.5rem; max-width: 42ch; }
.site-footer__isolfrance { display: inline-flex; align-items: center; gap: 0.4em; color: var(--accent); font-weight: 550; }
.site-footer__isolfrance::after { content: "\2197"; }
.site-footer__heading { font-size: 0.78rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--on-dark-mute); margin-block-end: 1rem; }
.site-footer__nav ul { list-style: none; padding: 0; display: grid; gap: 0.6rem; grid-template-columns: 1fr 1fr; }
.site-footer__nav a { color: var(--on-dark-mute); transition: color 0.2s var(--ease); }
.site-footer__nav a:hover { color: var(--on-dark); }
.site-footer__bottom {
  display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; justify-content: space-between;
  padding-block: 1.5rem; border-block-start: 1px solid var(--line-dark);
  color: var(--on-dark-mute); font-size: 0.85rem;
}

/* ---------- Reveal (anime au scroll) ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}