@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

:root {
  --bg: #ffffff;
  --surface: #f9fafb;
  --border: #e5e7eb;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --text: #111111;
  --text-muted: #6b7280;
  --font: 'Inter', system-ui, sans-serif;
  --max-w: 960px;
  --nav-h: 64px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
}

.nav-inner {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-weight: 800;
  font-size: 17px;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.3px;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

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

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-direction: column;
  gap: 5px;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

/* ── SECTIONS ── */
section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 24px;
}

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

.section-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

/* ── HERO ── */
#hero {
  padding-top: 100px;
  padding-bottom: 100px;
}

.hero-name {
  font-size: clamp(44px, 7vw, 72px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 20px;
}

.hero-name .accent { color: var(--accent); }

.hero-subtitle {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 520px;
  margin-bottom: 36px;
}

.btn-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 11px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, transform 0.1s, box-shadow 0.15s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--text);
  color: #fff;
}

.btn-primary:hover {
  background: #333;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}

.btn-secondary:hover {
  border-color: #9ca3af;
  transform: translateY(-1px);
}

/* ── ABOUT ── */
.about-bio {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 640px;
  margin-bottom: 32px;
  line-height: 1.8;
}

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

.skill-tag {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
}

/* ── PROJECTS ── */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.project-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.15s;
}

.project-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.08), 0 4px 16px rgba(99, 102, 241, 0.12);
  transform: translateY(-2px);
}

.project-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.project-card h3 .arrow {
  font-size: 13px;
  color: var(--text-muted);
  transition: transform 0.15s;
}

.project-card:hover h3 .arrow {
  transform: translate(2px, -2px);
  color: var(--accent);
}

.project-card p {
  font-size: 13px;
  color: var(--text-muted);
  flex: 1;
  line-height: 1.6;
  margin-bottom: 16px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.project-tag {
  background: #eef2ff;
  color: var(--accent);
  padding: 2px 9px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 500;
}

/* ── BLOG PREVIEW ── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.blog-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s, transform 0.15s;
}

.blog-card:hover {
  border-color: #9ca3af;
  transform: translateY(-2px);
}

.blog-date {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-weight: 500;
}

.blog-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}

.blog-card p {
  font-size: 13px;
  color: var(--text-muted);
  flex: 1;
  line-height: 1.6;
}

.view-all {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.view-all:hover { text-decoration: underline; }

/* ── CONTACT ── */
.contact-text {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 480px;
  margin-bottom: 32px;
}

.contact-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  transition: border-color 0.15s, transform 0.1s;
}

.contact-link:hover {
  border-color: #9ca3af;
  transform: translateY(-1px);
}

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 16px;
  }
  .nav-hamburger { display: flex; }
  .hero-name { letter-spacing: -1px; }
  section { padding: 60px 20px; }
}