:root {
  color-scheme: light;
  --bg: #f2f4f7;
  --surface: #f9fbfd;
  --surface-2: #eef2f5;
  --text: #1f2a37;
  --muted: #64748b;
  --accent: #4b7bec;
  --accent-soft: rgba(75, 123, 236, 0.14);
  --border: #d7dde4;
  --shadow: 0 10px 28px rgba(31, 42, 55, 0.06);
  --radius: 14px;
}

body[data-theme="dark"] {
  color-scheme: dark;
  --bg: #10131a;
  --surface: #171b24;
  --surface-2: #202633;
  --text: #f3f6fb;
  --muted: #9aa6b2;
  --accent: #7aa2ff;
  --accent-soft: rgba(122, 162, 255, 0.16);
  --border: #2e3543;
  --shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  transition: background 0.25s ease, color 0.25s ease;
}

h1,
h2,
h3,
.tab-button,
.badge,
.hero__role {
  font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.page-shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

.hero,
.section-card,
.nav-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero {
  padding: 28px;
}

.hero__topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.badge {
  display: inline-block;
  padding: 8px 12px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
}

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero__content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
}

h1,
h2,
h3 {
  margin-top: 0;
}

.section-icon {
  color: var(--accent);
  margin-right: 8px;
}

.hero__contact p,
.hero__links a {
  display: flex;
  align-items: center;
  gap: 8px;
}

h1 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  margin-bottom: 8px;
}

.hero__role {
  color: var(--accent);
  font-weight: 600;
  margin-top: 0;
}

.hero__summary {
  color: var(--muted);
  max-width: 680px;
}

.hero__contact {
  background: var(--surface-2);
  border-radius: 16px;
  padding: 16px 18px;
  align-self: start;
}

.hero__links {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

.hero__links a {
  text-decoration: none;
  color: var(--accent);
  font-weight: 600;
}

.hero__links a:hover {
  opacity: 0.85;
}

.nav-panel {
  margin: 20px 0;
  padding: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tab-button {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
  border-radius: 999px;
}

.tab-button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.section-card {
  padding: 24px 28px;
  margin-bottom: 22px;
}

.section-card + .section-card {
  border-top: 1px solid var(--border);
}

.skills-grid,
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.skills-grid article,
.project-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  list-style: none;
}

.pill-list li {
  padding: 8px 12px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
}

.timeline-item {
  padding: 16px 0;
  border-top: 1px solid var(--border);
}

.timeline-item:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.timeline-item__header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

@media (max-width: 760px) {
  .hero__content,
  .skills-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .page-shell {
    padding: 14px;
  }

  .section-card,
  .hero {
    padding: 18px;
  }
}