/* ─────────────────────────────────────
   VARIABLES
───────────────────────────────────── */
:root {
  --font: -apple-system, "SF Pro Display", "SF Pro Text", BlinkMacSystemFont,
          "Helvetica Neue", Helvetica, Arial, sans-serif;

  --bg:      #ffffff;
  --text:    #1d1d1f;
  --muted:   #6e6e73;
  --border:  #e5e5e7;
  --surface: #f5f5f7;
  --accent:  #0071e3;

  --max-w:   680px;
  --radius:  12px;
  --nav-h:   58px;

  --tracking-display: -0.05em;
  --tracking-title:   -0.03em;
  --tracking-body:    -0.01em;
}

/* ─────────────────────────────────────
   RESET & BASE
───────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img  { max-width: 100%; display: block; }
a    { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
ul { list-style: none; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 17px;
  line-height: 1.65;
  letter-spacing: var(--tracking-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ─────────────────────────────────────
   TYPOGRAPHY
───────────────────────────────────── */
h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: var(--tracking-title);
}
h1 { font-size: clamp(32px, 6vw, 48px); letter-spacing: var(--tracking-display); }
h2 { font-size: clamp(22px, 4vw, 28px); }
h3 { font-size: 19px; }
p  { color: var(--text); }

/* ─────────────────────────────────────
   LAYOUT
───────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ─────────────────────────────────────
   NAV
───────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 200;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-logo {
  font-weight: 600;
  font-size: 16px;
  letter-spacing: var(--tracking-title);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 15px;
  color: var(--muted);
  letter-spacing: var(--tracking-body);
  transition: color .15s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
}
.nav-toggle span {
  display: block;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: all .2s;
}

/* Mobile drawer */
.nav-mobile {
  display: none;
  position: sticky;
  top: var(--nav-h);
  z-index: 199;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.nav-mobile.open { display: block; }
.nav-mobile ul { padding: 8px 24px 16px; }
.nav-mobile li { border-bottom: 1px solid var(--border); }
.nav-mobile li:last-child { border-bottom: none; }
.nav-mobile a {
  display: block;
  padding: 14px 0;
  font-size: 17px;
  color: var(--text);
}

/* ─────────────────────────────────────
   HERO
───────────────────────────────────── */
.hero {
  padding: 80px 0 64px;
  text-align: center;
}

.hero-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 24px;
  background: var(--surface);
  border: 2px solid var(--border);
}
.hero-avatar img { width: 100%; height: 100%; object-fit: cover; }
.hero-avatar-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0;
}

.hero h1 { margin-bottom: 14px; }

.hero-bio {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
  max-width: 460px;
  margin: 0 auto 32px;
}

.hero-socials {
  display: flex;
  gap: 12px;
  justify-content: center;
}
.hero-socials a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 18px;
  border: 1px solid var(--border);
  border-radius: 980px;
  font-size: 14px;
  color: var(--muted);
  transition: all .15s;
}
.hero-socials a:hover {
  background: var(--surface);
  border-color: var(--text);
  color: var(--text);
}

/* ─────────────────────────────────────
   SECTIONS (home)
───────────────────────────────────── */
.section {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 28px;
}
.section-title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}
.section-more {
  font-size: 14px;
  color: var(--accent);
  transition: opacity .15s;
}
.section-more:hover { opacity: .7; }

/* ─────────────────────────────────────
   BLOG CARDS
───────────────────────────────────── */
.post-list { display: flex; flex-direction: column; }

.post-card {
  display: block;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}
.post-card:first-child { padding-top: 0; }
.post-card:last-child { border-bottom: none; padding-bottom: 0; }

.post-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.post-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 6px;
  background: var(--surface);
  color: var(--muted);
}
.post-date { font-size: 13px; color: var(--muted); }

.post-card h3 {
  font-size: 19px;
  letter-spacing: -0.025em;
  line-height: 1.3;
  margin-bottom: 8px;
  transition: color .15s;
}
.post-card:hover h3 { color: var(--accent); }

.post-excerpt {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-readmore {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 10px;
  font-size: 14px;
  color: var(--accent);
  transition: gap .15s;
}
.post-card:hover .post-readmore { gap: 8px; }

/* ─────────────────────────────────────
   PROJECT GRID (home)
───────────────────────────────────── */
.project-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.project-card {
  display: block;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: background .15s, border-color .15s;
}
.project-card:hover,
.project-card:not(.no-link):hover {
  background: var(--surface);
  border-color: transparent;
}
.project-card.no-link { cursor: default; }

.project-tag {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.project-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}
.project-card p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

/* ─────────────────────────────────────
   PAGE HEADER (blog / projets / contact)
───────────────────────────────────── */
.page-header {
  padding: 60px 0 36px;
  border-bottom: 1px solid var(--border);
}
.page-header h1 { margin-bottom: 8px; }
.page-header p  { color: var(--muted); font-size: 17px; }

/* ─────────────────────────────────────
   INDIVIDUAL POST
───────────────────────────────────── */
.post-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 32px 0 0;
  font-size: 14px;
  color: var(--muted);
  transition: color .15s;
}
.post-back:hover { color: var(--text); }

.post-page-header {
  padding: 32px 0 36px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}
.post-page-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.post-page-title {
  font-size: clamp(28px, 5vw, 40px);
  letter-spacing: var(--tracking-display);
  line-height: 1.15;
  margin-bottom: 16px;
}
.post-page-excerpt {
  font-size: 19px;
  color: var(--muted);
  line-height: 1.55;
  letter-spacing: var(--tracking-body);
}

.post-page-image {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 40px;
}
.post-page-image img { width: 100%; max-height: 360px; object-fit: cover; }

.post-content { padding-bottom: 96px; }

.post-content p  { margin-bottom: 26px; font-size: 17px; line-height: 1.75; }
.post-content h2 { margin: 48px 0 14px; }
.post-content h3 { margin: 32px 0 10px; }
.post-content img {
  width: 100%;
  border-radius: var(--radius);
  margin: 32px 0;
}
.post-content blockquote {
  border-left: 3px solid var(--border);
  padding: 4px 0 4px 20px;
  margin: 32px 0;
  color: var(--muted);
  font-style: italic;
}
.post-content ul,
.post-content ol { padding-left: 24px; margin-bottom: 26px; }
.post-content li { margin-bottom: 8px; line-height: 1.65; }
.post-content a  { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

/* ─────────────────────────────────────
   PROJECTS FULL PAGE
───────────────────────────────────── */
.projects-full { padding: 40px 0 80px; }
.project-grid-full { display: flex; flex-direction: column; gap: 14px; }

.project-card-full {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: background .15s;
}
.project-card-full:hover { background: var(--surface); }

.project-card-full-info h3 { font-size: 19px; margin-bottom: 6px; }
.project-card-full-info p  { font-size: 15px; color: var(--muted); line-height: 1.55; }

.project-link-btn {
  flex-shrink: 0;
  display: inline-block;
  padding: 8px 18px;
  border-radius: 980px;
  border: 1px solid var(--border);
  font-size: 14px;
  color: var(--muted);
  white-space: nowrap;
  transition: all .15s;
}
a.project-link-btn:hover {
  background: var(--text);
  color: #fff;
  border-color: var(--text);
}
.project-link-btn.disabled { opacity: .45; cursor: default; }

/* ─────────────────────────────────────
   CONTACT FORM
───────────────────────────────────── */
.contact-section { padding: 40px 0 80px; }

.contact-intro {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.6;
  margin-bottom: 36px;
  max-width: 480px;
}

.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 7px;
  letter-spacing: var(--tracking-body);
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 16px;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  transition: border-color .15s, box-shadow .15s;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, .12);
}
.form-group textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.6;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: var(--tracking-body);
  font-family: var(--font);
  transition: all .15s;
  cursor: pointer;
}
.btn-primary { background: var(--text); color: #fff; border: none; }
.btn-primary:hover { background: #333; transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }

.alert {
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 15px;
  margin-bottom: 28px;
  line-height: 1.5;
}
.alert-success {
  background: #f0fdf4;
  color: #166534;
  border: 1px solid #bbf7d0;
}
.alert-error {
  background: #fff1f2;
  color: #9f1239;
  border: 1px solid #fecdd3;
}
.alert-error a { color: inherit; text-decoration: underline; }

/* ─────────────────────────────────────
   PROJECTS LIST PAGE
───────────────────────────────────── */
.project-card-full-link {
  display: block;
  text-decoration: none;
  color: inherit;
}
.project-card-full-link .project-card-full {
  transition: background .15s, border-color .15s;
  cursor: pointer;
  align-items: center;
}
.project-card-full-link:hover .project-card-full {
  background: var(--surface);
  border-color: transparent;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
}
.project-arrow {
  flex-shrink: 0;
  color: var(--muted);
  transition: transform .15s, color .15s;
}
.project-card-full-link:hover .project-arrow {
  transform: translateX(4px);
  color: var(--text);
}
.project-card-img {
  width: 80px;
  height: 80px;
  border-radius: var(--radius);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--surface);
}
.project-card-img img { width: 100%; height: 100%; object-fit: cover; }

.project-soon-badge {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 6px;
  background: #fef9c3;
  color: #854d0e;
  border: 1px solid #fde68a;
}

/* ─────────────────────────────────────
   NEWSLETTER SUBSCRIBE BOX
───────────────────────────────────── */
.subscribe-box {
  border-top: 1px solid var(--border);
  padding: 40px 0 80px;
}
.subscribe-box h3 {
  font-size: 22px;
  letter-spacing: var(--tracking-title);
  margin-bottom: 10px;
}
.subscribe-box > p {
  font-size: 16px;
  color: var(--muted);
  margin-bottom: 24px;
}
.subscribe-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.subscribe-form input[type="email"] {
  flex: 1;
  min-width: 220px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 16px;
  font-family: var(--font);
  color: var(--text);
  background: #fff;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.subscribe-form input[type="email"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,113,227,.1);
}
.subscribe-form button {
  padding: 12px 24px;
  border-radius: 980px;
  background: var(--text);
  color: #fff;
  border: none;
  font-size: 15px;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: background .15s;
  white-space: nowrap;
}
.subscribe-form button:hover { background: #333; }

.subscribe-success {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius);
  color: #166534;
  font-size: 15px;
}
.subscribe-success strong { display: block; margin-bottom: 2px; }
.subscribe-success p { margin: 0; font-size: 14px; opacity: .8; }

/* ─────────────────────────────────────
   FOOTER
───────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}
.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-copy { font-size: 14px; color: var(--muted); }
.footer-links { display: flex; gap: 24px; }
.footer-links a {
  font-size: 14px;
  color: var(--muted);
  transition: color .15s;
}
.footer-links a:hover { color: var(--text); }

/* ─────────────────────────────────────
   404
───────────────────────────────────── */
.not-found {
  text-align: center;
  padding: 120px 0;
}
.not-found-code {
  display: block;
  font-size: 96px;
  font-weight: 700;
  letter-spacing: var(--tracking-display);
  color: var(--border);
  line-height: 1;
  margin-bottom: 24px;
}
.not-found h1 { font-size: 28px; margin-bottom: 12px; }
.not-found p  { color: var(--muted); margin-bottom: 28px; }

/* ─────────────────────────────────────
   RESPONSIVE
───────────────────────────────────── */
@media (max-width: 600px) {
  .nav-links    { display: none; }
  .nav-toggle   { display: flex; }

  .hero { padding: 56px 0 48px; }
  .hero h1 { font-size: 34px; }
  .hero-bio { font-size: 16px; }

  .form-row { grid-template-columns: 1fr; gap: 0; }

  .project-grid { grid-template-columns: 1fr; }

  .project-card-full {
    flex-direction: column;
    gap: 14px;
  }

  .footer .container {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .post-page-title { font-size: 28px; }
  .post-page-excerpt { font-size: 17px; }
}