/* ==========================================================================
   Site Vitrine — Design System
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --color-bg: #faf9f6;
  --color-text: #1a1a1a;
  --color-text-light: #6b6b6b;
  --color-text-muted: #9e9e9e;
  --color-border: #e0e0e0;
  --color-accent: #4a4a4a;
  --color-btn-medium: #9e9e9e;
  --color-btn-dark: #6b6b6b;

  /* Typography */
  --font-heading: 'Cormorant Garamond', 'Georgia', serif;
  --font-body: 'Inter', 'Helvetica Neue', Arial, sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
  --space-2xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 80px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--color-text);
  background-color: var(--color-bg);
  /* Subtle noise texture */
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.02'/%3E%3C/svg%3E");
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0.02em;
}

h1 { font-size: 2.75rem; letter-spacing: 0.03em; }
h2 { font-size: 2.25rem; letter-spacing: 0.02em; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.125rem; font-weight: 600; }

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 249, 246, 0.85); /* Matches var(--color-bg) */
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  height: var(--header-height);
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.logo-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-text-light);
  flex-shrink: 0;
  transition: background var(--transition-base);
}

.site-logo:hover .logo-dot {
  background: var(--color-text);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-name {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.2;
}

.logo-subtitle {
  font-size: 0.8rem;
  color: var(--color-text-light);
  font-weight: 300;
  letter-spacing: 0.02em;
}

/* Navigation */
.main-nav {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-text-light);
  padding: var(--space-xs) var(--space-md);
  position: relative;
  letter-spacing: 0.02em;
  transition: color var(--transition-fast);
}

.nav-link:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 16px;
  background: var(--color-border);
}

.nav-link:hover,
.nav-link--active {
  color: var(--color-text);
}

.nav-link--active {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
}

.menu-bar {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

/* --------------------------------------------------------------------------
   Hero (Homepage)
   -------------------------------------------------------------------------- */
.hero {
  min-height: calc(100vh - var(--header-height) - 120px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) var(--space-lg);
}

.hero-inner {
  max-width: var(--max-width);
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
}

.hero-portrait {
  flex-shrink: 0;
}

.portrait-img,
.portrait-placeholder {
  width: 340px;
  height: 340px;
  border-radius: 50%;
  object-fit: cover;
}

.portrait-placeholder {
  background: linear-gradient(135deg, var(--color-border) 0%, var(--color-text-muted) 100%);
}

.hero-content {
  max-width: 500px;
}

.hero-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.hero-quote {
  margin-bottom: var(--space-xl);
  font-style: italic;
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.8;
  border: none;
  padding: 0;
}

.hero-quote footer {
  margin-top: var(--space-sm);
  text-align: right;
  font-style: normal;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-quote cite {
  font-style: normal;
}

.hero-quote cite em {
  font-style: italic;
  text-transform: none;
  letter-spacing: normal;
}

/* Circle Buttons */
.hero-buttons {
  display: flex;
  gap: var(--space-md);
}

.circle-btn {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 500;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
  text-decoration: none;
}

.circle-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.circle-btn--outline {
  border: 1.5px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
}

.circle-btn--outline:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

.circle-btn--medium {
  background: var(--color-btn-medium);
  color: var(--color-bg);
  border: none;
}

.circle-btn--medium:hover {
  background: #8a8a8a;
  color: var(--color-bg);
}

.circle-btn--dark {
  background: var(--color-btn-dark);
  color: var(--color-bg);
  border: none;
}

.circle-btn--dark:hover {
  background: #555;
  color: var(--color-bg);
}

/* --------------------------------------------------------------------------
   Page Content (generic)
   -------------------------------------------------------------------------- */
.page-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg) var(--space-2xl);
}

.page-content h1 {
  margin-bottom: var(--space-xl);
}

.page-content h2 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.page-content h2:first-of-type {
  border-top: none;
  padding-top: 0;
}

.page-content p {
  margin-bottom: var(--space-sm);
}

/* --------------------------------------------------------------------------
   Biographie — Timeline
   -------------------------------------------------------------------------- */
.bio-banner {
  width: 100%;
  max-height: 300px;
  object-fit: cover;
  margin-bottom: var(--space-xl);
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.timeline-entry {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--space-md);
  align-items: start;
}

.timeline-date {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-weight: 400;
  text-align: right;
  padding-top: 2px;
}

.timeline-content h3 {
  margin-bottom: var(--space-xs);
}

.timeline-content p {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   Projets — Zigzag Layout
   -------------------------------------------------------------------------- */
.project-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  padding: var(--space-xl) 0;
}

.project-section:not(:last-child) {
  border-bottom: 1px solid var(--color-border);
}

.project-section:nth-child(even) .project-text {
  order: 2;
}

.project-section:nth-child(even) .project-image {
  order: 1;
}

.project-text h2 {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.project-image img {
  width: 100%;
  border-radius: 4px;
}

/* --------------------------------------------------------------------------
   Portfolio — Grid
   -------------------------------------------------------------------------- */
.portfolio-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}

.portfolio-item {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.portfolio-item:hover img {
  transform: scale(1.03);
}

.portfolio-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.15);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-overlay span {
  color: white;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.contact-info h1 {
  margin-bottom: var(--space-sm);
}

.contact-intro {
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
}

.contact-detail {
  margin-bottom: var(--space-md);
}

.contact-detail h4 {
  margin-bottom: var(--space-xs);
}

.contact-detail a {
  color: var(--color-text-light);
}

.contact-detail a:hover {
  color: var(--color-text);
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.75rem;
  border: 1.5px solid var(--color-text);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(74, 74, 74, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-submit-row {
  display: flex;
  align-items: flex-end;
  gap: var(--space-md);
}

.btn-submit {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  border: 1.5px solid var(--color-text);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base), transform var(--transition-base);
  flex-shrink: 0;
}

.btn-submit:hover {
  background: var(--color-text);
  color: var(--color-bg);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) 0;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.footer-heading {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.footer-col p,
.footer-col a {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.footer-col a:hover {
  color: var(--color-text);
}

.social-links {
  display: flex;
  gap: var(--space-sm);
}

.social-link {
  color: var(--color-text);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.social-link:hover {
  color: var(--color-text-light);
  transform: translateY(-2px);
}

.footer-col--legal {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-left: auto;
}

.footer-col--legal a {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-col--copyright {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: right;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }

  /* Header */
  .menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
  }

  .main-nav.nav--open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link::after {
    display: none !important;
  }

  .nav-link {
    padding: var(--space-sm) 0;
    font-size: 1.1rem;
  }

  /* Hero */
  .hero {
    padding: var(--space-lg) var(--space-md);
  }

  .hero-inner {
    flex-direction: column;
    text-align: center;
    gap: var(--space-lg);
  }

  .portrait-img,
  .portrait-placeholder {
    width: 220px;
    height: 220px;
  }

  .hero-buttons {
    justify-content: center;
  }

  .circle-btn {
    width: 90px;
    height: 90px;
    font-size: 0.85rem;
  }

  /* Timeline */
  .timeline-entry {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }

  .timeline-date {
    text-align: left;
  }

  /* Projects */
  .project-section {
    grid-template-columns: 1fr;
  }

  .project-section:nth-child(even) .project-text,
  .project-section:nth-child(even) .project-image {
    order: unset;
  }

  /* Portfolio */
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  /* Contact */
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer-inner {
    flex-direction: column;
    gap: var(--space-md);
  }

  .footer-col--legal {
    margin-left: 0;
  }

  .footer-col--copyright {
    text-align: left;
  }
}

/* --------------------------------------------------------------------------
   Preview Banner
   -------------------------------------------------------------------------- */
.preview-banner {
  background: linear-gradient(90deg, #f59e0b, #d97706);
  color: #1a1a1a;
  font-size: 0.85rem;
  padding: 0.5rem 0;
  text-align: center;
  z-index: 200;
  position: relative;
}

.preview-banner-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
}

.preview-banner-icon {
  font-size: 1rem;
}

.preview-banner-text {
  line-height: 1.4;
}

.preview-banner-close {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: rgba(0, 0, 0, 0.6);
  padding: 0 0.25rem;
  margin-left: var(--space-sm);
  transition: color var(--transition-fast);
}

.preview-banner-close:hover {
  color: rgba(0, 0, 0, 1);
}

/* --------------------------------------------------------------------------
   Lists
   -------------------------------------------------------------------------- */
.page-content ul {
  padding-left: 1.5rem;
  margin-bottom: var(--space-sm);
}

.page-content li {
  margin-bottom: 0.25rem;
}

/* --------------------------------------------------------------------------
   Obfuscation UI
   -------------------------------------------------------------------------- */
.btn-reveal {
  background: none;
  border: none;
  padding: 0;
  font-family: inherit;
  font-size: inherit;
  color: var(--color-text-light);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

.btn-reveal:hover {
  color: var(--color-text);
}

.revealed-link {
  color: var(--color-text-light);
  font-weight: 500;
  animation: revealFade 0.3s ease;
}

.revealed-link:hover {
  color: var(--color-text);
}

@keyframes revealFade {
  from { opacity: 0; transform: translateY(-2px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   Animations & Micro-interactions
   -------------------------------------------------------------------------- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: opacity, transform;
}

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