/* ==========================================================================
   La Vigilia — style.css
   Conforme charte visuelle (Nébuleuse Liminale)
   ========================================================================== */

/* --- Custom properties : palette --------------------------------------- */

:root {
  /* Couleurs structurantes */
  --nuit: #0F0A14;
  --encre: #1A1A1A;
  --terre: #A8917A;
  --ambre: #C4956A;
  --rouge: #8B0000;
  --creme: #F7F5F0;
  --os: #E8E4DD;
  --cendre: #6B6560;
  --papier: #E8E3DC;
  --filet: #C8C4BC;
  --braise: #1A1215;
  --encre-adouci: #4A4540;

  /* Layout */
  --max-width: 1000px;
  --reading-width: 680px;
  --section-padding-y: 80px;
  --section-padding-x: 40px;

  /* Typographie */
  --font-serif: 'EB Garamond', Georgia, 'Times New Roman', serif;

  /* Transition dual-mode */
  --mode-transition: background-color 400ms ease, color 400ms ease, border-color 400ms ease;
}

/* Mode Institutionnel (clair) — défaut */
:root,
[data-mode="light"] {
  --bg: var(--creme);
  --bg-alt: var(--papier);
  --bg-block: var(--papier);
  --text: var(--encre);
  --text-body: var(--encre-adouci);
  --text-meta: var(--cendre);
  --accent: var(--rouge);
  --structure: var(--terre);
  --separator: var(--filet);
  --gradient-bg: var(--creme);
}

/* Mode Veille Nocturne (sombre) */
[data-mode="dark"] {
  --bg: var(--nuit);
  --bg-alt: var(--braise);
  --bg-block: var(--braise);
  --text: var(--os);
  --text-body: var(--os);
  --text-meta: var(--cendre);
  --accent: var(--ambre);
  --structure: var(--ambre);
  --separator: #2A2025;
  --gradient-bg:
    radial-gradient(ellipse at 50% 45%, rgba(139, 0, 0, 0.16) 0%, transparent 60%),
    radial-gradient(ellipse at 50% 20%, rgba(168, 145, 122, 0.09) 0%, transparent 50%),
    radial-gradient(ellipse at 10% 90%, rgba(60, 40, 80, 0.12) 0%, transparent 45%),
    radial-gradient(ellipse at 90% 90%, rgba(60, 40, 80, 0.10) 0%, transparent 45%),
    var(--nuit);
}

/* Respecte la préférence système si aucun choix explicite */
@media (prefers-color-scheme: dark) {
  :root:not([data-mode]) {
    --bg: var(--nuit);
    --bg-alt: var(--braise);
    --bg-block: var(--braise);
    --text: var(--os);
    --text-body: var(--os);
    --text-meta: var(--cendre);
    --accent: var(--ambre);
    --structure: var(--ambre);
    --separator: #2A2025;
    --gradient-bg:
      radial-gradient(ellipse at 50% 45%, rgba(139, 0, 0, 0.16) 0%, transparent 60%),
      radial-gradient(ellipse at 50% 20%, rgba(168, 145, 122, 0.09) 0%, transparent 50%),
      radial-gradient(ellipse at 10% 90%, rgba(60, 40, 80, 0.12) 0%, transparent 45%),
      radial-gradient(ellipse at 90% 90%, rgba(60, 40, 80, 0.10) 0%, transparent 45%),
      var(--nuit);
  }
}

/* --- Reset & base ------------------------------------------------------ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 18px;
  line-height: 1.7;
  background: var(--gradient-bg);
  color: var(--text-body);
  transition: var(--mode-transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 300ms ease;
}

a:hover {
  opacity: 0.7;
}

/* --- Layout ------------------------------------------------------------ */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--section-padding-x);
}

.reading {
  max-width: var(--reading-width);
  margin: 0 auto;
}

/* --- Header ------------------------------------------------------------ */

.site-header {
  padding: 32px var(--section-padding-x);
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  gap: 24px;
}

.site-header .brand {
  font-size: 13px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-meta);
  font-weight: 400;
}

.header-controls {
  display: flex;
  gap: 20px;
  align-items: center;
}

/* Sélecteur de langue */
.lang-switcher {
  display: flex;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-meta);
}

.lang-switcher a,
.lang-switcher span {
  color: var(--text-meta);
  padding: 4px 6px;
  border-bottom: 1px solid transparent;
  transition: border-color 300ms ease, color 300ms ease;
}

.lang-switcher a:hover {
  color: var(--accent);
  opacity: 1;
}

.lang-switcher .current {
  color: var(--text);
  border-bottom-color: var(--accent);
}

/* Toggle mode */
.mode-toggle {
  background: transparent;
  border: 1px solid var(--separator);
  color: var(--text-meta);
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 8px 14px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 300ms ease;
}

.mode-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.mode-toggle .icon {
  display: inline-block;
  margin-right: 6px;
}

/* --- Hero -------------------------------------------------------------- */

.hero {
  padding: 100px var(--section-padding-x) 80px;
  text-align: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero .logo-wrapper {
  max-width: 520px;
  margin: 0 auto 60px;
}

.hero .logo-wrapper svg,
.hero .logo-wrapper img {
  width: 100%;
  height: auto;
}

/* Swap logo selon le mode */
.logo-dark { display: none; }
.logo-light { display: block; }

[data-mode="dark"] .logo-light { display: none; }
[data-mode="dark"] .logo-dark { display: block; }

@media (prefers-color-scheme: dark) {
  :root:not([data-mode]) .logo-light { display: none; }
  :root:not([data-mode]) .logo-dark { display: block; }
}

.hero h1 {
  font-size: 44px;
  font-weight: 400;
  line-height: 1.25;
  color: var(--text);
  max-width: 720px;
  margin: 0 auto 24px;
}

.hero .tagline {
  font-style: italic;
  font-size: 22px;
  line-height: 1.5;
  color: var(--text-meta);
  max-width: 600px;
  margin: 0 auto;
}

/* --- Manifeste --------------------------------------------------------- */

.manifesto {
  padding: 60px var(--section-padding-x) 100px;
}

.manifesto section {
  margin-bottom: 80px;
}

.manifesto section:last-child {
  margin-bottom: 0;
}

.manifesto .section-label {
  display: block;
  font-size: 14px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
  text-align: center;
}

.manifesto h2 {
  font-size: 32px;
  font-weight: 400;
  line-height: 1.3;
  color: var(--text);
  text-align: center;
  margin-bottom: 48px;
}

.manifesto p {
  font-size: 18px;
  line-height: 1.75;
  color: var(--text-body);
  margin-bottom: 24px;
}

.manifesto p:last-child {
  margin-bottom: 0;
}

/* Séparateur entre sections */
.section-divider {
  width: 60px;
  height: 1px;
  background: var(--structure);
  margin: 0 auto 60px;
  opacity: 0.5;
}

/* Dernière ligne du manifeste : accentuée */
.closing {
  text-align: center;
  margin-top: 60px;
}

.closing p {
  font-style: italic;
  font-size: 22px;
  line-height: 1.5;
  color: var(--text);
  max-width: 500px;
  margin: 0 auto 16px;
}

.closing p.signature {
  font-style: normal;
  font-size: 13px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-top: 40px;
}

/* --- Contact footer ---------------------------------------------------- */

.contact {
  padding: 100px var(--section-padding-x) 120px;
  text-align: center;
  max-width: var(--max-width);
  margin: 0 auto;
  border-top: 1px solid var(--separator);
}

.contact h2 {
  font-size: 28px;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 24px;
}

.contact p {
  color: var(--text-body);
  margin-bottom: 32px;
  font-size: 17px;
}

.contact .email-link {
  display: inline-block;
  font-size: 15px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 400;
  padding: 14px 32px;
  border: 1.5px solid var(--accent);
  border-radius: 4px;
  color: var(--accent);
  transition: all 300ms ease;
}

.contact .email-link:hover {
  background: var(--accent);
  color: var(--creme);
  opacity: 1;
}

[data-mode="dark"] .contact .email-link:hover,
:root:not([data-mode]) .contact .email-link:hover {
  /* light mode hover already correct */
}

[data-mode="dark"] .contact .email-link:hover {
  background: rgba(196, 149, 106, 0.2);
  color: var(--os);
}

/* --- Footer légal ------------------------------------------------------ */

.site-footer {
  padding: 40px var(--section-padding-x) 60px;
  text-align: center;
  font-size: 13px;
  color: var(--text-meta);
  max-width: var(--max-width);
  margin: 0 auto;
  line-height: 1.8;
}

.site-footer p {
  margin-bottom: 4px;
}

/* --- Fade-in animations ------------------------------------------------ */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 900ms ease, transform 900ms ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive -------------------------------------------------------- */

@media (max-width: 700px) {
  :root {
    --section-padding-x: 24px;
  }

  body {
    font-size: 17px;
  }

  .site-header {
    flex-direction: column;
    gap: 16px;
    padding: 24px var(--section-padding-x);
  }

  .hero {
    padding: 60px var(--section-padding-x) 50px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero .tagline {
    font-size: 18px;
  }

  .manifesto h2 {
    font-size: 26px;
    margin-bottom: 36px;
  }

  .manifesto p {
    font-size: 17px;
  }

  .manifesto section {
    margin-bottom: 60px;
  }

  .closing p {
    font-size: 19px;
  }

  .contact {
    padding: 70px var(--section-padding-x) 90px;
  }

  .contact h2 {
    font-size: 24px;
  }
}

/* --- Préférence mouvement réduit --------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  .fade-in {
    opacity: 1;
    transform: none;
  }
  html {
    scroll-behavior: auto;
  }
}