:root {
  --bg: #ffffff;
  --bg-alt: #f6f8fb;
  --text: #1a1f2e;
  --muted: #5a6577;
  --primary: #2b6cb0;
  --primary-dark: #234e7d;
  --accent: #00a8a8;
  --border: #e3e8ef;
  --shadow: 0 6px 24px rgba(20, 30, 60, 0.08);
  --radius: 12px;
  --max: 1100px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

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

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  font-weight: 700;
  font-size: 1.2rem;
  text-decoration: none;
  color: var(--text);
}
.logo span { color: var(--primary); }
.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--primary); }
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero */
.hero {
  padding: 80px 0 64px;
  background: linear-gradient(180deg, #f6f8fb 0%, #ffffff 100%);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: center;
}
.eyebrow {
  color: var(--primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.85rem;
  margin: 0 0 8px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  margin: 0 0 8px;
  line-height: 1.1;
}
.hero h2 {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 500;
  color: var(--muted);
  margin: 0 0 20px;
}
.lead {
  color: var(--muted);
  margin: 0 0 28px;
  font-size: 1.05rem;
}
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.15s, background 0.2s, color 0.2s;
  font-size: 0.95rem;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-ghost:hover { background: var(--primary); color: #fff; }

.hero-avatar { display: flex; justify-content: center; }
.avatar-ring {
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
}
.avatar-initials {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -2px;
}

/* Sections */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-title {
  font-size: 2rem;
  margin: 0 0 8px;
  text-align: center;
}
.section-sub {
  text-align: center;
  color: var(--muted);
  margin: 0 0 48px;
}

/* About cards */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card h3 { margin: 0 0 10px; color: var(--primary); }
.card p { margin: 0; color: var(--muted); }

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.skill-group {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
}
.skill-group h4 {
  margin: 0 0 14px;
  color: var(--primary);
  font-size: 1.1rem;
}
.skill-group ul { margin: 0; padding-left: 18px; color: var(--muted); }
.skill-group li { margin-bottom: 6px; }

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.project {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}
.project:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.project h3 { margin: 16px 20px 6px; }
.project p { margin: 0 20px 12px; color: var(--muted); font-size: 0.95rem; }
.project .tag {
  display: inline-block;
  margin: 0 20px 18px;
  font-size: 0.8rem;
  color: var(--primary);
  background: rgba(43, 108, 176, 0.08);
  padding: 4px 10px;
  border-radius: 20px;
}
.project-thumb {
  height: 140px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}
.thumb-1 { background: linear-gradient(135deg, #2b6cb0, #00a8a8); }
.thumb-2 { background: linear-gradient(135deg, #6b46c1, #d53f8c); }
.thumb-3 { background: linear-gradient(135deg, #38a169, #00a8a8); }
.thumb-4 { background: linear-gradient(135deg, #dd6b20, #d53f8c); }

/* Education */
.education-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 36px;
  max-width: 720px;
  margin: 0 auto;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.education-card h3 {
  margin: 0 0 6px;
  color: var(--primary);
  font-size: 1.4rem;
}
.edu-degree { font-weight: 600; margin: 0 0 4px; }
.edu-meta { color: var(--muted); margin: 0 0 16px; }

/* Contact */
.contact-inner { max-width: 640px; }
.contact-form {
  background: var(--bg-alt);
  padding: 32px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.form-row { margin-bottom: 18px; display: flex; flex-direction: column; }
.form-row label {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
}
.form-row input,
.form-row textarea {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  transition: border-color 0.2s;
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--primary);
}
.form-status {
  margin: 14px 0 0;
  font-size: 0.95rem;
  color: var(--accent);
  min-height: 1.2em;
}

/* Footer */
.footer {
  background: #0f1626;
  color: #cbd2e0;
  padding: 28px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer p { margin: 0; font-size: 0.9rem; }
.footer-links {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
}
.footer-links a {
  color: #cbd2e0;
  text-decoration: none;
  font-size: 0.9rem;
}
.footer-links a:hover { color: #fff; }

/* Legal pages */
.legal-page { padding: 60px 0 80px; }
.legal-page h1 {
  font-size: 2.2rem;
  margin: 0 0 4px;
}
.legal-page .updated {
  color: var(--muted);
  margin: 0 0 36px;
  font-size: 0.95rem;
}
.legal-page h2 {
  margin-top: 36px;
  color: var(--primary);
  font-size: 1.3rem;
}
.legal-page h3 {
  margin-top: 22px;
  font-size: 1.1rem;
}
.legal-page p, .legal-page li {
  color: #2d3748;
  line-height: 1.75;
}
.legal-page ul { padding-left: 22px; }

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .menu-toggle { display: block; }
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-cta { justify-content: center; }
  .avatar-ring { width: 180px; height: 180px; }
  .avatar-initials { width: 164px; height: 164px; font-size: 3rem; }
  .section { padding: 60px 0; }
}