/* =======================================================
   Dynamic CSS Theme for Arthur Boda — Aurora Portfolio
   - Coherent with sections/IDs in the provided index.html
   - Aurora background, glass UI, reveal animations, carousel
   - Light/Dark themes via [data-theme] and system preference
   ======================================================= */

/* ---------- CSS Reset (modern minimal) ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
:where(html) {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}
:where(body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, img) {
  margin: 0;
  padding: 0;
}
:where(ul, ol) { list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { border: none; background: none; cursor: pointer; }
:where(input, button, textarea, select) { font: inherit; color: inherit; }
:root { color-scheme: light dark; }

/* ---------- Theme Variables ---------- */
:root {
  --bg: #0b1020;
  --bg-soft: #121933;
  --surface: rgba(255,255,255,0.08);
  --text: #e6e8ff;
  --muted: #a7b0d6;
  --primary: #7aa2ff;
  --primary-2: #a78bfa;
  --accent: #60a5fa;
  --accent-2: #93c5fd;
  --ok: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;

  /* Aurora layers */
  --aurora: repeating-linear-gradient(100deg,#3b82f6 10%,#a5b4fc 15%,#93c5fd 20%,#ddd6fe 25%,#60a5fa 30%);
  --white-gradient: repeating-linear-gradient(100deg,#fff 0%,#fff 7%,transparent 10%,transparent 12%,#fff 16%);
  --dark-gradient: repeating-linear-gradient(100deg,#000 0%,#000 7%,transparent 10%,transparent 12%,#000 16%);

  --blur: 20px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.25);
  --shadow-hard: 0 30px 80px rgba(0, 0, 0, 0.45);

  --content-w: 1200px;
  --section-py: clamp(56px, 7vw, 120px);
  --gutter: clamp(16px, 3.5vw, 40px);

  /* Aurora motion position (updated by JS for subtle parallax) */
  --aurora-x: 50%;
  --aurora-y: 50%;
}

/* Light theme override */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fe;
    --bg-soft: #eef1ff;
    --surface: rgba(0,0,0,0.06);
    --text: #0b0f1a;
    --muted: #475569;
    --primary: #3b82f6;
    --primary-2: #7c3aed;
    --accent: #2563eb;
    --accent-2: #60a5fa;
  }
}
[data-theme="dark"] {
  --bg: #0b1020;
  --bg-soft: #121933;
  --surface: rgba(255,255,255,0.08);
  --text: #e6e8ff;
  --muted: #a7b0d6;
}
[data-theme="light"] {
  --bg: #f7f8fe;
  --bg-soft: #eef1ff;
  --surface: rgba(0,0,0,0.06);
  --text: #0b0f1a;
  --muted: #475569;
}

/* ---------- Base ---------- */
html, body {
  width: 100%;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Poppins", system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  line-height: 1.6;
}
main { display: block; }
.container {
  width: min(100% - 2*var(--gutter), var(--content-w));
  margin-inline: auto;
}
.section {
  padding-block: var(--section-py);
}

/* ---------- Aurora Background Layer ---------- */
.aurora-bg {
  position: relative;
  isolation: isolate;
  background: radial-gradient(1200px 800px at var(--aurora-x) var(--aurora-y), rgba(96,165,250,0.12), transparent 60%),
              radial-gradient(1000px 600px at calc(100% - 20%) 20%, rgba(167,139,250,0.10), transparent 60%),
              var(--bg);
  overflow-x: clip;
}
.aurora-bg::before,
.aurora-bg::after {
  content: "";
  position: fixed;
  inset: -10%;
  z-index: -2;
  pointer-events: none;
  filter: blur(10px);
  background-image: var(--white-gradient), var(--aurora);
  background-size: 300%, 200%;
  background-position: 50% 50%, var(--aurora-x) var(--aurora-y);
  opacity: 0.5;
  mix-blend-mode: screen;
  animation: auroraShift 60s linear infinite;
}
@media (prefers-color-scheme: dark) {
  .aurora-bg::before,
  .aurora-bg::after {
    background-image: var(--dark-gradient), var(--aurora);
    mix-blend-mode: lighten;
  }
}
@keyframes auroraShift {
  0%   { background-position: 50% 50%, 30% 40%; }
  50%  { background-position: 20% 80%, 70% 60%; }
  100% { background-position: 50% 50%, 30% 40%; }
}

/* ---------- Header / Nav ---------- */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  background: color-mix(in oklab, var(--bg) 75%, transparent);
  border-bottom: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
  transition: background 300ms ease, border-color 300ms ease, transform 300ms ease;
}
header.scrolled {
  background: color-mix(in oklab, var(--bg) 85%, transparent);
  transform: translateY(-2px);
}
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 12px;
  width: min(100% - 2*var(--gutter), var(--content-w));
  margin-inline: auto;
}
.logo a {
  font-weight: 700;
  letter-spacing: 0.4px;
  font-size: clamp(18px, 2.4vw, 22px);
  background: linear-gradient(90deg, var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}
.nav-links a {
  color: var(--muted);
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 999px;
  transition: color 200ms ease, background 200ms ease;
}
.nav-links a:hover {
  color: var(--text);
  background: color-mix(in oklab, var(--surface) 40%, transparent);
}

/* ---------- Hero / About ---------- */
#about-me .about-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(18px, 4vw, 40px);
  align-items: center;
}
@media (max-width: 900px) {
  #about-me .about-container { grid-template-columns: 1fr; }
}
#about-me .about-text h1 {
  font-size: clamp(28px, 4.5vw, 48px);
  line-height: 1.15;
  margin-bottom: 8px;
}
.highlight {
  background: linear-gradient(90deg, var(--accent), var(--primary-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
#about-me p { color: var(--muted); margin-top: 8px; }
#about-me ul {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}
#about-me li {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  align-items: center;
  gap: 10px;
  color: var(--text);
}
#about-me .about-image {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-hard);
  transform: translateZ(0);
}
#about-me .cv-container {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}
.btn {
  --btn-bg: color-mix(in oklab, var(--surface) 60%, transparent);
  --btn-fg: var(--text);
  --btn-ring: color-mix(in oklab, var(--primary) 30%, transparent);
  border-radius: 999px;
  padding: 10px 16px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  backdrop-filter: blur(calc(var(--blur) * 0.5));
  border: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}
.btn:hover {
  transform: translateY(-1px);
  border-color: color-mix(in oklab, var(--primary) 40%, transparent);
  box-shadow: 0 8px 30px color-mix(in oklab, var(--primary) 20%, transparent);
}
.btn.primary {
  --btn-bg: linear-gradient(90deg, color-mix(in oklab, var(--primary) 85%, transparent), color-mix(in oklab, var(--primary-2) 85%, transparent));
  --btn-fg: white;
}

/* Map existing class names to .btn (drop-in) */
.cv-button, .contact-button { composes: btn from none; }
.cv-button { composes: primary from none; }

/* ---------- Timeline / Parcours ---------- */
#parcours .timeline {
  display: grid;
  gap: 20px;
  margin-top: 20px;
}
#parcours article {
  padding: 18px;
  border-radius: var(--radius-xl);
  background: color-mix(in oklab, var(--surface) 70%, transparent);
  border: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
  box-shadow: var(--shadow-soft);
  transition: transform 200ms ease, border-color 200ms ease;
}
#parcours article:hover {
  transform: translateY(-2px);
  border-color: color-mix(in oklab, var(--primary) 30%, transparent);
}
#parcours h1 { margin-bottom: 12px; font-size: clamp(24px, 4vw, 36px); }

/* ---------- Skills Grid ---------- */
#skills .skills-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

#skills h1 { margin-bottom: 12px; font-size: clamp(24px, 4vw, 36px); }
.skill-card {
  display: grid;
  place-items: center;
  gap: 8px;
  padding: 18px;
  border-radius: 18px;
  background: color-mix(in oklab, var(--surface) 70%, transparent);
  border: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
  transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
  will-change: transform;
}
.skill-card:hover {
  transform: translateY(-6px) scale(1.03);
  border-color: color-mix(in oklab, var(--primary) 30%, transparent);
  box-shadow: 0 20px 50px color-mix(in oklab, var(--accent) 15%, transparent);
}
.skill-card img {
  height: 48px;
  width: 48px;
  object-fit: contain;
}

/* ---------- Projects — Apple-like Carousel ---------- */
#projects .work {
  display: grid;
  gap: 16px;
}
#projects h1 { margin-bottom: 6px; font-size: clamp(24px, 4vw, 36px); }

#projects .work .slider {
  gap: clamp(28px, 3.2vw, 44px);
}
/* Hide the old arrows text but keep accessible */
.slider--prev,
.slider--next {
  position: relative;
  z-index: 4;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--surface) 70%, transparent);
  border: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
  display: grid;
  place-items: center;
  color: var(--muted);
  transition: transform 200ms ease, border-color 200ms ease, background 200ms ease;
}
.slider--prev:hover,
.slider--next:hover {
  transform: translateY(-1px);
  border-color: color-mix(in oklab, var(--primary) 30%, transparent);
}

/* New carousel container style matching your existing markup */
.work--lockup {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
}

.slider {
  display: flex;
  gap: 16px;
  padding: 16px;
  margin: 0;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none; /* Firefox */
}
.slider::-webkit-scrollbar { display: none; }

/* ---- CARD ---- */
.slider--item {
  position: relative;
  flex: 0 0 clamp(260px, 32vw, 380px);
  height: clamp(360px, 42vw, 560px);
  border-radius: 28px;
  overflow: hidden;
  scroll-snap-align: center;
  background: color-mix(in oklab, var(--surface) 70%, transparent);
  border: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
  transition: transform 350ms ease, box-shadow 350ms ease, border-color 300ms ease, opacity 300ms ease;
  will-change: transform;

  /* centrage parfait du contenu */
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

/* si des images trainent encore dans le markup, on les cache */
.slider--item img { display: none !important; }

/* l'ancre remplit la carte et centre son contenu */
.slider--item .project-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  text-decoration: none;
  padding: clamp(12px, 3vw, 24px);
}

/* ---- TITLE ---- */
.slider--item .slider--item-title {
  position: static !important; /* neutralise d'anciennes règles absolues */
  margin: 0;
  max-width: 90%;
  line-height: 1.15;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  font-size: clamp(1.4rem, 3.8vw, 2.8rem); /* grand & fluide */
  color: var(--text);
  user-select: none;
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);
}

/* Assure le centrage même quand le JS ajoute ces classes */
.slider--item-left,
.slider--item-right,
.slider--item-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Scale cards relative to center (CSS only approximation, JS improves further) */
.slider:has(.slider--item:hover) .slider--item:not(:hover) {
  opacity: 0.8;
  transform: scale(0.96);
}
.slider--item:hover {
  transform: translateY(-6px) scale(1.02);
  border-color: color-mix(in oklab, var(--primary) 30%, transparent);
  box-shadow: 0 30px 90px color-mix(in oklab, var(--accent) 18%, transparent);
}

/* Edge gradient masks */
.slider-mask {
  position: absolute;
  inset: 0;
  pointer-events: none;
  mask: linear-gradient(to right, transparent 0%, black 8%, black 92%, transparent 100%);
}

/* Accessibilité : moins d’animations */
@media (prefers-reduced-motion: reduce) {
  .slider:has(.slider--item:hover) .slider--item:not(:hover) { transform: none; }
  .slider--item:hover { transform: none; }
}

/* ---------- Techwatch (collapsible) ---------- */
#techwatch .toggle-btn {
  margin-top: 12px;
  font-weight: 600;
  border-radius: 10px;
  padding: 8px 12px;
  background: color-mix(in oklab, var(--surface) 70%, transparent);
  border: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
}
#techwatch .tech-content {
  overflow: clip;
  max-height: 0;
  transition: max-height 450ms ease;
}
#techwatch .tech-content.open { max-height: 2000px; }

/* ---------- Contact ---------- */
#contact .social-links {
  display: flex;
  gap: 14px;
  align-items: center;
}
#contact h1 { margin-bottom: 12px; font-size: clamp(24px, 4vw, 36px); }

#contact img {
  filter: drop-shadow(0 10px 30px rgba(0,0,0,0.25));
  transition: transform 200ms ease;
}
#contact img:hover { transform: translateY(-4px) scale(1.035); }

/* ---------- Footer ---------- */
footer {
  margin-top: 60px;
  opacity: 0.8;
  text-align: center;
  padding: 24px;
  font-size: 0.95rem;
  color: var(--muted);
}

/* ---------- Reveal on Scroll ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 500ms ease, transform 600ms cubic-bezier(.2,.8,.2,1);
  will-change: opacity, transform;
}
[data-reveal].reveal-in {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Utilities ---------- */
.space2 { margin-top: 16px; }
.space4 { margin-top: 24px; }
.lead { color: var(--muted); }
.grid { display: grid; gap: 12px; }
.hidden { display: none !important; }

/* ---------- Selection ---------- */
::selection {
  background: color-mix(in oklab, var(--primary) 35%, transparent);
  color: white;
}

/* Mobile adjustments: header, nav, spacing, etc. */
@media (max-width: 900px) {
  /* Existing breakpoint for about-me grid already present */
  nav {
    flex-direction: column;
    gap: 8px;
    padding-block: 8px;
  }
  .nav-links {
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
  }
}

@media (max-width: 600px) {
  header {
    padding-inline: 0;
  }
  .container {
    width: 100%;
    padding-inline: var(--gutter);
  }
  .section {
    padding-block: clamp(36px, 8vw, 72px);
  }
  #about-me .about-container {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  #about-me .about-text h1 {
    font-size: clamp(22px, 8vw, 32px);
  }
  #about-me .about-image {
    border-radius: var(--radius-xl);
  }
  #parcours .timeline {
    gap: 10px;
    margin-top: 10px;
  }
  #parcours article {
    padding: 10px;
    border-radius: 14px;
  }
  #skills .skills-container {
    gap: 8px;
  }
  .skill-card {
    padding: 12px;
  }
  #projects .work {
    gap: 8px;
  }
  .slider--item {
    height: clamp(220px, 42vw, 320px);
    flex-basis: clamp(180px, 60vw, 240px);
    border-radius: 20px;
  }
  .slider {
    gap: 8px;
    padding: 8px;
  }
  #contact .social-links {
    gap: 8px;
    flex-wrap: wrap;
  }
  #contact img {
    width: 32px;
    height: 32px;
  }
  footer {
    padding: 10px;
    font-size: 0.75rem;
    margin-top: 30px;
  }
  .btn, .cv-button, .contact-button {
    padding: 8px 12px;
    font-size: 0.95em;
  }
}

/* Smallest screens (mobile XS) */
@media (max-width: 420px) {
  .slider--item {
    height: 180px;
    flex-basis: 120px;
    border-radius: 14px;
  }
  .about-text h1 {
    font-size: 1.55rem; font-size: clamp(24px, 4vw, 36px);
  }
}