/* ==========================================================================
   Sarah Villelongue — portfolio2026
   Charte graphique reprise de livrables/sites-web/2026-07-13-refonte-sarahvillelongue
   (design tokens "Villelongue Design System") — pas de framework, pas de build step.
   ========================================================================== */

:root {
  /* Couleurs */
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8F9FF;
  --color-card: #FFFFFF;
  --color-ink: #2B241F;
  --color-ink-soft: #64748B;
  --color-ink-faint: rgba(100, 116, 139, 0.75);
  --color-accent: #FB8C6D;
  --color-accent-dark: #E36A47;
  --color-accent-tint: rgba(251, 140, 109, 0.16);
  --color-border: #E8DCD3;
  --color-todo-bg: #FFF3C4;
  --color-todo-border: #C9A227;

  --brand-secondary: #5EEAD4;
  --brand-tertiary: #FBBF24;
  --soft-lavender: #F0EEFF;
  --gradient-signature: linear-gradient(135deg, #FB8C6D 0%, #FBBF24 100%);
  --gradient-aurora: linear-gradient(135deg, #FB8C6D 0%, #FBBF24 50%, #5EEAD4 100%);

  /* Alias conservés pour compat interne (mêmes valeurs que les tokens ci-dessus) */
  --purple: var(--color-accent);
  --violet: var(--brand-tertiary);
  --teal: var(--brand-secondary);
  --light: var(--color-bg-alt);
  --ink-text: var(--color-ink);
  --grey: var(--color-ink-soft);
  --white: #FFFFFF;
  --gradient-action: var(--gradient-signature);
  --gradient-ai: var(--gradient-signature);

  /* Typographie */
  --font-display: "DM Serif Display", Georgia, "Times New Roman", serif;
  --font-text: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: var(--font-display);
  --font-sans: var(--font-text);

  /* Rythme */
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --radius-full: 999px;
  --shadow-card: 0 8px 24px rgba(26, 16, 64, 0.10);
  --shadow-card-hover: 0 20px 48px rgba(26, 16, 64, 0.14);
  --shadow-glow: 0 8px 32px rgba(251, 140, 109, 0.35);
  --container: 1120px;
  --section-y: 76px;
}

/* --------------------------------------------------------------------
   Reset / base
   -------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 400;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
}
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: var(--section-y) 0; }
.section--dark,
.section--light { background: var(--color-bg); color: var(--color-ink); }
.section--dark { background: var(--color-bg-alt); }
.section--dark p, .section--light p { color: var(--color-ink-soft); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-text);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
  margin-bottom: 16px;
}

.gradient-text {
  background: var(--gradient-signature);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-style: italic;
}

/* --------------------------------------------------------------------
   Boutons
   -------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.85em 1.6em;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
  transition: transform 150ms ease-out, filter 150ms ease-out, background 150ms ease-out, border-color 150ms ease-out;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: var(--gradient-signature);
  color: var(--color-ink);
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { filter: brightness(1.06); }
.btn-ghost {
  background: var(--color-card);
  border-color: var(--color-border);
  color: var(--color-accent-dark);
  box-shadow: 0 1px 2px rgba(26, 16, 64, 0.06);
}
.btn-ghost:hover { background: var(--soft-lavender); border-color: var(--color-accent); }

/* --------------------------------------------------------------------
   Placeholder de contenu manquant
   -------------------------------------------------------------------- */
.todo {
  background: var(--color-todo-bg);
  border: 1px dashed var(--color-todo-border);
  border-radius: 3px;
  padding: 0.05em 0.45em;
  font-style: italic;
  font-size: 0.94em;
  display: inline;
}

/* --------------------------------------------------------------------
   Header / nav
   -------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--color-border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.logo, .brand {
  display: flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.05rem;
  color: var(--color-ink);
}
.logo img, .brand img { height: 28px; width: auto; }
.logo .logo-dark { display: none; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.1em;
}
.nav-links a {
  font-size: 0.96rem;
  font-weight: 500;
  color: var(--color-ink-soft);
  position: relative;
  padding: 4px 0;
}
.nav-links a.active { color: var(--color-ink); font-weight: 500; }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -8px;
  height: 2px;
  background: var(--color-accent);
}
.nav-links a:hover { color: var(--color-ink); }

.nav-right { display: flex; align-items: center; gap: 1.4em; }
.lang-switch {
  display: flex;
  gap: 0.4em;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.lang-switch a { padding: 0.2em 0.4em; color: var(--color-ink-faint); }
.lang-switch a.active { color: var(--color-ink); border-bottom: 2px solid var(--color-accent); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--color-ink); border-radius: 2px; }

/* --------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------- */
.hero { padding: 88px 0 64px; }
.hero h1 { max-width: 18em; font-size: clamp(2.1rem, 4.2vw, 3.4rem); }
.hero .lede { font-size: 1.2rem; color: var(--color-ink-soft); max-width: 46em; margin: 1.1em 0 1.8em; }
.hero-actions { display: flex; gap: 1em; margin-top: 32px; flex-wrap: wrap; }

/* Hero d'accueil : visuel installation cristal, pleine largeur, overlay sombre */
.hero-home {
  padding: 168px 0 128px;
  background-image: linear-gradient(180deg, rgba(20, 16, 14, 0.35) 0%, rgba(20, 16, 14, 0.72) 100%), url('../images/hero-crystal-installation.jpg');
  background-size: cover;
  background-position: center;
}
.hero-home .eyebrow { color: rgba(255, 255, 255, 0.75); }
.hero-home h1 { color: #FFFFFF; }
.hero-home .lede { color: rgba(255, 255, 255, 0.85); }
.hero-home .gradient-text { -webkit-text-fill-color: initial; background: none; color: #FFFFFF; font-style: italic; }
.hero-home .btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.4);
  color: #FFFFFF;
  box-shadow: none;
}
.hero-home .btn-ghost:hover { background: rgba(255, 255, 255, 0.14); border-color: #FFFFFF; color: #FFFFFF; }

.hero-grid { display: grid; grid-template-columns: 1fr; gap: 0; }
.hero-visual { display: none; }

/* --------------------------------------------------------------------
   Client logos strip
   -------------------------------------------------------------------- */
.logo-strip {
  padding: 36px 0;
  background: var(--color-bg);
}
.logo-strip .label {
  text-align: center;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-ink-soft);
  margin-bottom: 20px;
}
.logo-row {
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: center;
  gap: 40px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 0 2px 4px;
}
.logo-row::-webkit-scrollbar { display: none; }
.logo-row img {
  flex: 0 0 auto;
  height: 28px;
  width: 84px;
  object-fit: contain;
  object-position: center;
  opacity: 0.72;
  filter: grayscale(100%);
  transition: opacity 0.2s ease, filter 0.2s ease;
}
.logo-row img:hover { opacity: 1; filter: grayscale(0); }

@media (max-width: 860px) {
  .logo-row { gap: 24px; justify-content: flex-start; }
  .logo-row img { height: 22px; width: 64px; }
}
@media (max-width: 560px) {
  .logo-row { gap: 16px; }
  .logo-row img { height: 18px; width: 50px; }
}

/* --------------------------------------------------------------------
   Cartes
   -------------------------------------------------------------------- */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card, .card--dark {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  box-shadow: var(--shadow-card);
  color: var(--color-ink);
  transition: box-shadow 200ms ease-out, transform 200ms ease-out;
}
.card:hover, .card--dark:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.card--dark p, .card p { color: var(--color-ink-soft); }

.tag {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-ink);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 5px 12px;
  margin: 0 6px 6px 0;
}
.section--dark .tag, .card--dark .tag { background: var(--color-bg); }

/* --------------------------------------------------------------------
   Case study cards (≈ .work-card de la charte)
   -------------------------------------------------------------------- */
.case-card {
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-card);
  box-shadow: var(--shadow-card);
  transition: box-shadow 200ms ease-out, transform 200ms ease-out;
}
.case-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.case-card-media {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--color-accent-tint), var(--soft-lavender));
  position: relative;
  overflow: hidden;
}
.case-card-media img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: top center;
}
.case-card-media::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(43,36,31,0) 55%, rgba(43,36,31,0.45) 100%);
}
.case-card-media .category {
  position: absolute; top: 16px; left: 16px; z-index: 2;
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: #FFFFFF;
  background: rgba(43,36,31,0.5);
  padding: 5px 10px; border-radius: var(--radius-full);
}
.case-card-body { padding: 22px 22px 24px; }
.case-card-body h3 { font-size: 1.2rem; margin-bottom: 0.3em; }
.case-card-body p { font-size: 0.95rem; color: var(--color-ink-soft); margin-bottom: 0.8em; }

/* Cover cristal pour la page de listing (cas où il n'y a pas d'image) */
.case-hero-cover {
  aspect-ratio: 21/9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  margin-top: 40px;
  background: linear-gradient(120deg, var(--color-accent-tint), var(--soft-lavender));
}
.case-hero-cover img { width: 100%; height: 100%; object-fit: cover; }

/* Gallery — visuels de détail, cadrage uniforme */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.gallery figure {
  margin: 0;
  aspect-ratio: 4/3;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--soft-lavender);
  border: 1px solid var(--color-border);
}
.gallery img { width: 100%; height: 100%; object-fit: cover; object-position: top center; cursor: zoom-in; }

/* Lightbox — zoom plein écran sur les visuels de projet */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(20, 16, 14, 0.92);
  align-items: center;
  justify-content: center;
  padding: 32px;
  cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 92vw;
  max-height: 88vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  cursor: default;
}
.lightbox-close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.12);
  color: #FFFFFF;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
}
.lightbox-close:hover { background: rgba(255,255,255,0.22); }

/* --------------------------------------------------------------------
   Stats (≈ .case-stat)
   -------------------------------------------------------------------- */
.stat-row { display: flex; flex-wrap: wrap; gap: 28px; padding: 20px 0; }
.stat .num {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  color: var(--color-accent-dark);
  display: block;
}
.stat .label { font-size: 0.82rem; color: var(--color-ink-soft); }

/* --------------------------------------------------------------------
   Method / process steps (≈ .principle-card, numéro en pastille)
   -------------------------------------------------------------------- */
.step { display: flex; gap: 20px; padding: 20px 0; border-top: 1px solid var(--color-border); }
.step:first-of-type { border-top: none; }
.step .index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  background: var(--color-accent-tint);
  color: var(--color-accent-dark);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  min-width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
}

/* --------------------------------------------------------------------
   Testimonials (≈ .testimonial)
   -------------------------------------------------------------------- */
.quote {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  font-style: italic;
  line-height: 1.5;
  color: var(--color-ink);
  margin-bottom: 20px;
}
.quote-author { font-family: var(--font-sans); font-weight: 600; color: var(--color-ink); }
.quote-role { font-size: 0.88rem; color: var(--color-ink-soft); }

.quote-byline { display: flex; align-items: center; gap: 12px; }
.quote-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--soft-lavender);
}
.quote-avatar img { width: 100%; height: 100%; object-fit: cover; }

/* --------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 0.85rem; font-weight: 600; color: var(--color-ink); }
.form-field input, .form-field textarea {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-card);
  color: var(--color-ink);
}
.form-field input:focus, .form-field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-tint);
}
.form-check { display: flex; align-items: center; gap: 10px; font-size: 0.85rem; color: var(--color-ink-soft); }
.form-note { font-size: 0.85rem; padding: 14px 18px; border-radius: var(--radius-sm); margin-top: 16px; }
.form-note.success { background: rgba(94,234,212,0.18); color: #0f766e; }
.form-note.error { background: rgba(227,106,71,0.12); color: var(--color-accent-dark); }
.contact-methods { display: flex; flex-direction: column; gap: 20px; margin-top: 32px; }
.contact-methods a { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; color: var(--color-accent-dark); }

/* --------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------- */
.site-footer {
  background: var(--color-bg-alt);
  color: var(--color-ink-soft);
  border-top: 1px solid var(--color-border);
  padding: 48px 0 36px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 32px;
  padding-bottom: 32px;
}
.footer-grid h4 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  margin-bottom: 16px;
}
.footer-grid a { display: block; padding: 5px 0; font-size: 0.92rem; color: var(--color-ink-soft); }
.footer-grid a:hover { color: var(--color-accent-dark); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  font-size: 0.82rem;
  color: var(--color-ink-faint);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom .links { display: flex; gap: 20px; }

/* --------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------- */
@media (max-width: 960px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-right .lang-switch { display: none; }
}
@media (max-width: 720px) {
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }

  .site-header.nav-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--color-border);
  }
  .site-header.nav-open .lang-switch { display: flex; }
}