:root {
  --bg: #f5f7fa;
  --fg: #181c25;
  --muted: #6c7589;
  --primary: #1e2bb8;
  --border: #dadde7;
  --card-bg: #eff1f5;
  --font-display: "Cormorant Garamond", Georgia, serif;
  --font-body: "Inter", system-ui, sans-serif;
  --max: 768px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 2px;
}

::selection {
  background: rgba(30, 43, 184, 0.15);
}

/* —— Scroll reveal —— */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.reveal-left {
  transform: translateX(-20px);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* —— Nav —— */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(245, 247, 250, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--fg);
}

.nav-links {
  display: flex;
  gap: 24px;
  font-size: 14px;
  color: var(--muted);
}

.nav-links a {
  transition: color 0.15s;
}

.nav-links a:hover {
  color: var(--fg);
}

/* —— Main —— */
.main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* —— Hero —— */
.hero {
  padding: 128px 0 64px;
}

.hero-subtitle {
  margin: 0 0 16px;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-title {
  margin: 0 0 24px;
  font-family: var(--font-display);
  font-size: clamp(60px, 8vw, 72px);
  font-weight: 600;
  line-height: 1.05;
  color: var(--fg);
}

.hero-desc {
  margin: 0;
  font-size: 18px;
  font-weight: 300;
  line-height: 1.6;
  color: var(--muted);
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  border-radius: 2px;
  transition: opacity 0.15s, background 0.15s, color 0.15s;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  color: var(--bg);
  border: none;
}

.btn-primary:hover {
  opacity: 0.9;
}

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

.btn-outline:hover {
  background: var(--fg);
  color: var(--bg);
}

/* —— Section divider —— */
.section-divider {
  height: 1px;
  background: var(--border);
  margin-top: 64px;
}

/* —— Sections —— */
.section {
  padding: 64px 0;
}

.section-title {
  margin: 0 0 40px;
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--fg);
}

/* —— Card grid —— */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 24px;
  transition: border-color 0.15s;
}

.card:hover {
  border-color: rgba(30, 43, 184, 0.3);
}

.card-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--fg);
  transition: color 0.15s;
}

.card:hover .card-title {
  color: var(--primary);
}

.card-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

/* —— Work list —— */
.work-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.work-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  border-radius: 2px;
  transition: background 0.15s;
}

.work-list li:hover {
  background: var(--card-bg);
}

.work-list li svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--primary);
}

.work-list li span {
  color: var(--fg);
}

/* —— Education —— */
.edu-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.edu-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.edu-item svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--primary);
  margin-top: 4px;
}

.edu-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--fg);
}

.edu-sub {
  margin: 2px 0 0;
  font-size: 14px;
  color: var(--muted);
}

/* —— Footer —— */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.footer-inner p {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
}

/* —— Responsive —— */
@media (max-width: 640px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    gap: 16px;
  }

  .hero-title {
    font-size: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}