/* ============================================================
   Thomas Szuwalski — Portfolio professionnel
   Direction artistique : sobre, institutionnelle, premium.
   ============================================================ */

:root {
  --color-bg: #FAFAF8;
  --color-bg-alt: #FFFFFF;
  --color-ink: #10192B;
  --color-ink-soft: #3C4658;
  --color-muted: #6B7280;
  --color-border: #E4E2DC;
  --color-accent: #2C4A6E;
  --color-accent-soft: #EEF2F6;
  --color-accent-light: #93B4DA;
  --color-invert-text: #F1F1EC;

  --font-serif: 'Fraunces', 'Georgia', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --container-w: 1120px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --section-pad: clamp(4rem, 9vw, 7.5rem);

  --radius: 4px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

ul { list-style: none; }

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

section { padding: var(--section-pad) 0; }
section.alt { background: var(--color-bg-alt); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }

.kicker {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 0.85rem;
  display: block;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h2 { font-size: clamp(1.9rem, 3.2vw, 2.6rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

.section-head {
  max-width: 640px;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

p { color: var(--color-ink-soft); }
p + p { margin-top: 1rem; }

.lede { font-size: 1.1rem; color: var(--color-ink-soft); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
  cursor: pointer;
}
.btn-primary { background: var(--color-ink); color: #fff; }
.btn-primary:hover { background: var(--color-accent); transform: translateY(-1px); }
.btn-secondary { background: transparent; color: var(--color-ink); border-color: var(--color-ink); }
.btn-secondary:hover { background: var(--color-ink); color: #fff; }
.btn-ghost { background: transparent; color: var(--color-ink-soft); border-color: var(--color-border); }
.btn-ghost:hover { border-color: var(--color-ink); color: var(--color-ink); }
.btn[disabled], .btn.is-disabled { opacity: 0.5; cursor: not-allowed; pointer-events: none; }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.85rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.main-nav ul { display: flex; gap: 2.1rem; }
.main-nav a {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
  padding: 0.4rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.main-nav a:hover, .main-nav a.is-active { color: var(--color-ink); border-color: var(--color-accent); }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border: none;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--color-ink); transition: transform 0.25s var(--ease), opacity 0.25s var(--ease); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { padding-top: clamp(5rem, 10vw, 8rem); padding-bottom: clamp(4rem, 8vw, 6rem); }
.hero .kicker { font-size: 0.8rem; }
.hero h1 {
  font-size: clamp(2.6rem, 6.5vw, 4.6rem);
  margin-bottom: 1.4rem;
}
.hero-intro { max-width: 620px; font-size: 1.15rem; margin-bottom: 2.4rem; }
.hero-links { display: flex; gap: 1.4rem; margin-top: 2rem; }
.hero-links a { font-size: 0.85rem; font-weight: 600; color: var(--color-muted); border-bottom: 1px solid transparent; }
.hero-links a:hover { color: var(--color-ink); border-color: var(--color-ink); }

.hero-grid {
  display: grid;
  grid-template-columns: 1fr minmax(220px, 320px);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}
.hero-photo {
  position: relative;
  justify-self: end;
  width: 100%;
  max-width: 300px;
}
.hero-photo::after {
  content: '';
  position: absolute;
  top: 16px; left: 16px; right: -16px; bottom: -16px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  z-index: 0;
}
.hero-photo-inner {
  position: relative;
  z-index: 1;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius);
  background: var(--color-accent-soft);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero-photo-inner img { width: 100%; height: 100%; object-fit: cover; }
.hero-photo-inner .monogram {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

/* ---------- About ---------- */
.about-columns {
  column-count: 2;
  column-gap: clamp(2rem, 5vw, 4rem);
  margin-top: 0.5rem;
}
.about-columns p { break-inside: avoid; margin-bottom: 1.1rem; }
.about-columns p + p { margin-top: 0; }

/* ---------- Timeline ---------- */
.timeline-columns { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2.5rem, 5vw, 4rem); }
.timeline-col-title {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 1.6rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}
.timeline-item { position: relative; padding-left: 1.5rem; padding-bottom: 2.2rem; border-left: 1px solid var(--color-border); }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -4.5px; top: 0.4rem;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}
.timeline-period { font-size: 0.78rem; font-weight: 600; color: var(--color-accent); letter-spacing: 0.03em; margin-bottom: 0.3rem; }
.timeline-item h4 { font-size: 1.05rem; margin-bottom: 0.15rem; }
.timeline-org { font-size: 0.88rem; color: var(--color-muted); margin-bottom: 0.5rem; }
.timeline-item p { font-size: 0.92rem; }
.timeline-skills { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.7rem; }
.tag {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 100px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

/* ---------- Projects ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.75rem;
}
.project-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-bg-alt);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
  display: flex;
  flex-direction: column;
}
.project-card:hover { border-color: var(--color-accent); transform: translateY(-2px); }
.project-thumb {
  aspect-ratio: 16 / 10;
  background: var(--color-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.project-thumb img { width: 100%; height: 100%; object-fit: cover; }
.project-thumb .placeholder-icon { color: var(--color-accent); opacity: 0.35; font-family: var(--font-serif); font-size: 2.2rem; }
.draft-badge {
  position: absolute; top: 0.7rem; right: 0.7rem;
  font-size: 0.66rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase;
  background: #fff; color: var(--color-muted);
  border: 1px solid var(--color-border);
  padding: 0.25rem 0.55rem;
  border-radius: 100px;
}
.project-body { padding: 1.4rem 1.5rem 1.6rem; flex: 1; display: flex; flex-direction: column; }
.project-category { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-accent); margin-bottom: 0.5rem; }
.project-body h3 { margin-bottom: 0.5rem; }
.project-body p { font-size: 0.92rem; flex: 1; }
.project-link { margin-top: 1rem; font-size: 0.82rem; font-weight: 600; color: var(--color-ink); }

.project-empty {
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  padding: clamp(2.5rem, 6vw, 4rem);
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}
.project-empty h3 { margin-bottom: 0.8rem; }
.project-empty p { margin-bottom: 1.6rem; }

/* Case study page */
.case-hero { padding-top: clamp(4rem, 8vw, 6rem); }
.case-meta { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-bottom: 1.2rem; }
.case-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 2.5rem; margin-top: 2.5rem; }
.case-block h4 { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-accent); margin-bottom: 0.7rem; }
.case-block ul { display: flex; flex-direction: column; gap: 0.4rem; }
.case-block ul li { font-size: 0.94rem; color: var(--color-ink-soft); padding-left: 1rem; position: relative; }
.case-block ul li::before { content: '—'; position: absolute; left: 0; color: var(--color-muted); }
.back-link { display: inline-block; margin-bottom: 2rem; font-size: 0.85rem; font-weight: 600; color: var(--color-muted); }
.back-link:hover { color: var(--color-ink); }

/* ---------- Skills ---------- */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: clamp(2rem, 4vw, 3rem); }
.skills-col-title { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-muted); margin-bottom: 1.1rem; padding-bottom: 0.7rem; border-bottom: 1px solid var(--color-border); }
.skills-col ul li { font-size: 0.95rem; color: var(--color-ink-soft); padding: 0.4rem 0; border-bottom: 1px dashed var(--color-border); }
.skills-col ul li:last-child { border-bottom: none; }
.tools-row { margin-top: clamp(2.5rem, 5vw, 3.5rem); padding-top: clamp(2rem, 4vw, 2.5rem); border-top: 1px solid var(--color-border); }
.tools-list { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1rem; }
.tools-list .tag { background: transparent; border: 1px solid var(--color-border); color: var(--color-ink-soft); }
.tools-empty { font-size: 0.88rem; color: var(--color-muted); font-style: italic; }

/* ---------- Alternance ---------- */
.alternance-box {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: clamp(2rem, 5vw, 3.2rem);
  background: var(--color-bg-alt);
}
.alternance-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.8rem 2.5rem; margin: 2.2rem 0 2.4rem; }
.alternance-item .label { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-muted); margin-bottom: 0.4rem; }
.alternance-item .value { font-size: 1rem; color: var(--color-ink); font-weight: 500; }

/* ---------- CV ---------- */
.cv-layout { display: grid; grid-template-columns: 260px 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.cv-preview {
  aspect-ratio: 3 / 4;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-family: var(--font-serif);
  font-size: 0.95rem;
  text-align: center;
  padding: 1rem;
}
.cv-note { font-size: 0.85rem; color: var(--color-muted); margin-top: 0.9rem; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: clamp(2.5rem, 6vw, 5rem); }
.contact-grid--solo { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; text-align: center; }
.contact-grid--solo .contact-info-list { align-items: center; }
.contact-grid--solo .contact-info-list li { text-align: center; }
.contact-grid--solo form { display: none; }
.contact-info-list { margin-top: 2rem; display: flex; flex-direction: column; gap: 1.1rem; }
.contact-info-list li { font-size: 0.95rem; }
.contact-info-list .label { display: block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-muted); margin-bottom: 0.25rem; }
.contact-info-list a:hover { color: var(--color-accent); }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.form-field { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 1.2rem; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 0.78rem; font-weight: 600; color: var(--color-ink-soft); }
.form-field input, .form-field textarea {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem 0.9rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  background: var(--color-bg-alt);
  transition: border-color 0.2s var(--ease);
}
.form-field input:focus, .form-field textarea:focus { outline: none; border-color: var(--color-accent); }
.form-field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 0.8rem; color: var(--color-muted); margin-top: 0.8rem; }

/* ---------- Footer ---------- */
.site-footer { padding: 3rem 0; border-top: 1px solid var(--color-border); }
.footer-grid { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.footer-brand { font-family: var(--font-serif); font-size: 1.05rem; }
.footer-tagline { font-size: 0.82rem; color: var(--color-muted); margin-top: 0.2rem; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-size: 0.85rem; color: var(--color-ink-soft); }
.footer-links a:hover { color: var(--color-ink); }
.footer-copy { font-size: 0.78rem; color: var(--color-muted); }

/* ---------- Inverted sections (contraste inversé) ---------- */
.invert { background: var(--color-ink); color: var(--color-invert-text); }
.invert.alt { border-color: transparent; }
.invert h1, .invert h2, .invert h3, .invert h4 { color: var(--color-bg); }
.invert p { color: rgba(241, 241, 236, 0.72); }
.invert .lede { color: rgba(241, 241, 236, 0.78); }
.invert .kicker { color: var(--color-accent-light); }

.invert .btn-primary { background: var(--color-bg); color: var(--color-ink); }
.invert .btn-primary:hover { background: var(--color-accent-light); color: var(--color-ink); }
.invert .btn-secondary { color: var(--color-bg); border-color: rgba(241, 241, 236, 0.4); }
.invert .btn-secondary:hover { background: var(--color-bg); color: var(--color-ink); }
.invert .btn-ghost { color: rgba(241, 241, 236, 0.65); border-color: rgba(241, 241, 236, 0.25); }
.invert .btn-ghost:hover { border-color: var(--color-bg); color: var(--color-bg); }

.invert .hero-links a { color: rgba(241, 241, 236, 0.6); }
.invert .hero-links a:hover { color: var(--color-bg); border-color: var(--color-bg); }
.invert .hero-photo-inner { background: rgba(241, 241, 236, 0.06); border-color: rgba(241, 241, 236, 0.2); }
.invert .hero-photo-inner .monogram { color: var(--color-accent-light); }
.invert .hero-photo::after { border-color: var(--color-accent-light); }

.invert .alternance-box { background: transparent; border: none; padding: 0; }
.invert .alternance-item .label { color: rgba(241, 241, 236, 0.5); }
.invert .alternance-item .value { color: var(--color-bg); }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .cv-layout, .contact-grid { grid-template-columns: 1fr; }
  .cv-preview { max-width: 260px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-photo { max-width: 240px; margin: 2.5rem auto 0; justify-self: center; }
  .timeline-columns { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 720px) {
  .main-nav { position: fixed; top: 76px; left: 0; right: 0; height: calc(100vh - 76px); overflow-y: auto; z-index: 90; background: var(--color-bg); border-top: 1px solid var(--color-border); padding: 2rem var(--gutter); transform: translateY(-8px); opacity: 0; pointer-events: none; transition: opacity 0.25s var(--ease), transform 0.25s var(--ease); }
  .main-nav.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .main-nav ul { flex-direction: column; gap: 1.4rem; }
  .main-nav a { font-size: 1rem; }
  .nav-toggle { display: flex; }
  .form-grid { grid-template-columns: 1fr; }
  .about-columns { column-count: 1; }
}

@media (max-width: 520px) {
  .hero-links { flex-direction: column; gap: 0.7rem; }
  .btn-row { flex-direction: column; }
  .btn-row .btn { justify-content: center; }
}