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

/* ── Theme tokens ────────────────────────────────────── */
:root {
  --bg: #fafafa;
  --bg-header: rgba(250, 250, 250, 0.8);
  --text: #0a0a0a;
  --text-muted: #666;
  --border: #e5e5e5;
  --card-bg: #fff;
  --card-hover-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --btn-primary-bg: #0a0a0a;
  --btn-primary-text: #fafafa;
  --pill-bg: #f4f4f5;
  --pill-hover-bg: #e5e5e5;
}

[data-theme="dark"] {
  --bg: #0a0a0a;
  --bg-header: rgba(10, 10, 10, 0.8);
  --text: #ededed;
  --text-muted: #a1a1a1;
  --border: #262626;
  --card-bg: #111;
  --card-hover-shadow: 0 4px 12px rgba(255, 255, 255, 0.05);
  --btn-primary-bg: #ededed;
  --btn-primary-text: #0a0a0a;
  --pill-bg: #1a1a1a;
  --pill-hover-bg: #262626;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a0a0a;
    --bg-header: rgba(10, 10, 10, 0.8);
    --text: #ededed;
    --text-muted: #a1a1a1;
    --border: #262626;
    --card-bg: #111;
    --card-hover-shadow: 0 4px 12px rgba(255, 255, 255, 0.05);
    --btn-primary-bg: #ededed;
    --btn-primary-text: #0a0a0a;
    --pill-bg: #1a1a1a;
    --pill-hover-bg: #262626;
  }
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Sticky header ───────────────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  gap: 24px;
  flex: 1;
  justify-content: center;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  position: relative;
  padding-bottom: 2px;
  transition: color 0.2s;
}

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

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, background 0.2s;
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--text-muted);
  background: var(--pill-bg);
}

[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }
:root:not([data-theme="dark"]) .icon-sun { display: block; }
:root:not([data-theme="dark"]) .icon-moon { display: none; }

/* ── Main content ────────────────────────────────────── */
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ── Hero ─────────────────────────────────────────────── */
.hero {
  padding: 80px 0 64px;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 8px;
}

.tagline {
  font-size: 1.25rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 4px;
}

.subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.hero-ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── Buttons ─────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border: 1px solid transparent;
}

.btn-primary:hover {
  opacity: 0.85;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--text-muted);
  background: var(--pill-bg);
}

/* ── Sections ────────────────────────────────────────── */
section {
  margin-bottom: 64px;
}

h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

/* ── Cards ────────────────────────────────────────────── */
.card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 16px;
  background: var(--card-bg);
  transition: box-shadow 0.2s, border-color 0.2s;
}

.card:hover {
  box-shadow: var(--card-hover-shadow);
  border-color: var(--text-muted);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 12px;
}

.card-title {
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.4;
}

.card-company {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.card-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
  padding-top: 2px;
}

.card-body-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── Custom bullet list ──────────────────────────────── */
.card-list {
  list-style: none;
  padding: 0;
}

.card-list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text);
}

.card-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-muted);
}

/* ── Skills ───────────────────────────────────────────── */
.skills-group {
  margin-bottom: 24px;
}

.skills-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.skills-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.85rem;
  border-radius: 9999px;
  background: var(--pill-bg);
  color: var(--text);
  border: 1px solid var(--border);
  transition: background 0.2s, border-color 0.2s;
}

.pill:hover {
  background: var(--pill-hover-bg);
  border-color: var(--text-muted);
}

/* ── Contact ─────────────────────────────────────────── */
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ── Footer ──────────────────────────────────────────── */
.footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 24px 48px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

/* ── Scroll animations ───────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 640px) {
  .hero h1 {
    font-size: 1.75rem;
  }

  .tagline {
    font-size: 1.05rem;
  }

  .hero {
    padding: 48px 0 40px;
  }

  .card-header {
    flex-direction: column;
    gap: 4px;
  }

  .card-date {
    padding-top: 0;
  }

  .hero-ctas {
    flex-direction: column;
  }

  .hero-ctas .btn {
    width: 100%;
    justify-content: center;
  }

  .contact-links {
    flex-direction: column;
  }

  .contact-links .btn {
    width: 100%;
    justify-content: center;
  }

  .nav {
    gap: 16px;
  }

  .nav-link {
    font-size: 0.8rem;
  }
}