:root {
  --bg: #f7f2ea;
  --bg-alt: #f0ecf7;
  --surface: #ffffff;
  --surface-soft: #f4f1fb;
  --border: #e6e1d8;

  --ink: #1b1a2e;
  --ink-soft: #5b5872;
  --ink-muted: #8b8798;

  --navy: #1c1840;
  --accent: #6d5ef0;
  --accent-soft: #ece9fb;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --font-head: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;

  --container: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 60%, var(--bg) 100%);
  line-height: 1.6;
}

h1, h2, h3 { font-family: var(--font-head); color: var(--navy); margin: 0; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================
   Buttons & tags
   ========================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { opacity: 0.92; }

.btn-ghost { background: var(--surface); color: var(--navy); border-color: var(--border); }
.btn-ghost:hover { background: var(--surface-soft); }

.btn-sm { padding: 9px 18px; font-size: 0.85rem; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--ink-soft);
  font-size: 0.85rem;
  font-weight: 500;
}
.badge-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: #3ecf7a;
}

.pill {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.pill-live { background: #e4f8ec; color: #1f8a4c; }
.pill-progress { background: var(--accent-soft); color: var(--accent); }

.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 500;
}

/* ==========================================================
   Header
   ========================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 242, 234, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--navy);
}
.brand-logo { width: 30px; height: 30px; border-radius: 8px; object-fit: cover; }

.nav {
  display: flex;
  gap: 28px;
  margin-left: auto;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-soft);
}
.nav a:hover { color: var(--navy); }

.nav-toggle { display: none; }

/* ==========================================================
   Hero
   ========================================================== */
.hero { padding: 80px 0 96px; }

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: start;
}

.hero-text .badge { margin-bottom: 24px; }

h1 {
  font-size: clamp(2.4rem, 4.4vw, 3.6rem);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.text-accent { color: var(--accent); }

.hero-lead {
  margin-top: 22px;
  max-width: 480px;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.hero-actions { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-value { font-family: var(--font-head); font-size: 1.5rem; font-weight: 700; color: var(--navy); }
.stat-label { font-size: 0.75rem; color: var(--ink-muted); text-transform: uppercase; letter-spacing: 0.05em; }

/* Hero card */
.hero-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 24px 48px -24px rgba(28, 24, 64, 0.18);
}
.hero-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.hero-card-title { font-weight: 600; color: var(--navy); font-size: 0.95rem; }

.fact-list { display: flex; flex-direction: column; gap: 12px; }
.fact-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--surface-soft);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}
.fact-row dt { color: var(--ink-muted); }
.fact-row dd { margin: 0; font-weight: 600; color: var(--ink); }

.hero-card-footer {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--ink-muted);
}

/* ==========================================================
   Sections
   ========================================================== */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-alt); }

.section-title {
  font-size: clamp(1.7rem, 2.6vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 36px;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 36px;
}
.section-head .section-title { margin-bottom: 0; }
.section-note { color: var(--ink-muted); font-size: 0.85rem; }

/* About */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.about-text { color: var(--ink-soft); font-size: 1.02rem; }
.about-list { display: flex; flex-direction: column; gap: 12px; color: var(--ink-soft); font-size: 0.95rem; }
.about-list li { padding-left: 18px; position: relative; }
.about-list li::before {
  content: "";
  position: absolute; left: 0; top: 9px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
}

/* Stack */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}
.stack-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
}
.stack-card h3 {
  font-size: 1rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.tag-muted { background: var(--bg-alt); color: var(--ink-muted); }

/* Projects */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.project-thumb {
  width: 100%;
  height: 160px;
  object-fit: cover;
  object-position: center 22%;
  display: block;
}
.project-thumb-cloud {
  background: linear-gradient(135deg, #6d5ef0 0%, #a394f7 50%, #e9e5f7 100%);
}
.project-body { padding: 24px; display: flex; flex-direction: column; gap: 14px; }
.project-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.project-body h3 { font-size: 1.1rem; }
.project-body p { color: var(--ink-soft); font-size: 0.92rem; }
.card-link { font-weight: 600; color: var(--accent); font-size: 0.88rem; }
.card-link:hover { text-decoration: underline; }

/* Certifications */
.table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.cert-table { width: 100%; border-collapse: collapse; }
.cert-table th, .cert-table td {
  text-align: left;
  padding: 18px 24px;
  font-size: 0.92rem;
}
.cert-table th {
  background: var(--surface-soft);
  color: var(--ink-muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.cert-table tbody tr + tr { border-top: 1px solid var(--border); }

/* Timeline */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 2px solid var(--border);
  padding-left: 32px;
}
.timeline-item { position: relative; padding-bottom: 40px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-marker {
  position: absolute;
  left: -39px; top: 4px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg);
}
.timeline-date { font-size: 0.78rem; color: var(--accent); font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; }
.timeline-content h3 { margin-top: 6px; font-size: 1.1rem; }
.timeline-org { display: block; margin-top: 4px; color: var(--ink-muted); font-size: 0.85rem; }
.timeline-content p { margin-top: 10px; color: var(--ink-soft); font-size: 0.92rem; max-width: 640px; }

/* Contact */
.section-contact { text-align: center; }
.contact-inner { display: flex; flex-direction: column; align-items: center; }
.contact-lead { margin-top: -12px; margin-bottom: 32px; color: var(--ink-soft); }
.contact-actions { justify-content: center; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0; }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--ink-muted);
  font-size: 0.85rem;
}
.footer-links { display: flex; gap: 20px; }
.footer-links a:hover { color: var(--navy); }

/* ==========================================================
   Responsive
   ========================================================== */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav { display: none; }
  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-left: auto;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
  }
  .nav-toggle span { width: 22px; height: 2px; background: var(--navy); }
  .header-inner.nav-open .nav {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: var(--surface);
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
  }
  .header-inner .btn-primary { display: none; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .stack-grid { grid-template-columns: 1fr; }
  .cert-table { font-size: 0.85rem; }
}