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

:root {
  --color-bg: #0f1117;
  --color-bg-alt: #161b27;
  --color-surface: #1e2535;
  --color-border: #2a3347;
  --color-accent: #4f8ef7;
  --color-accent-hover: #3a7af0;
  --color-text: #e8eaf0;
  --color-text-muted: #8892a4;
  --color-text-faint: #4a5568;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.5);
  --max-width: 1100px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

/* ===========================
   Layout
=========================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 6rem 0;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

/* ===========================
   Header / Nav
=========================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

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

/* ===========================
   Hero
=========================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 64px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(79, 142, 247, 0.08) 0%, transparent 70%),
              radial-gradient(ellipse 40% 40% at 80% 80%, rgba(79, 142, 247, 0.04) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.hero-eyebrow {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero-name {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.hero-title {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.separator {
  color: var(--color-text-faint);
  margin: 0 0.5rem;
}

.hero-tagline {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 2.5rem;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ===========================
   Buttons
=========================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(79, 142, 247, 0.35);
}

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

.btn-secondary:hover {
  background: var(--color-border);
  transform: translateY(-1px);
}

/* ===========================
   Section Headers
=========================== */
.section-header {
  margin-bottom: 3.5rem;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  line-height: 1.2;
}

/* ===========================
   About
=========================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
  font-size: 1.0625rem;
  line-height: 1.8;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-interests h3 {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}

.interest-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.interest-list li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9375rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.625rem 0.875rem;
  transition: border-color var(--transition);
}

.interest-list li:hover {
  border-color: var(--color-accent);
}

.interest-icon {
  font-size: 1rem;
  line-height: 1;
}

/* ===========================
   Skills
=========================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.skill-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.skill-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.skill-card-icon {
  width: 40px;
  height: 40px;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

.skill-card-icon svg {
  width: 100%;
  height: 100%;
}

.skill-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.625rem;
}

.skill-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.skill-tags span {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-accent);
  background: rgba(79, 142, 247, 0.1);
  border: 1px solid rgba(79, 142, 247, 0.2);
  border-radius: 4px;
  padding: 0.2rem 0.6rem;
}

/* ===========================
   Contact
=========================== */
.contact-lead {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 500px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.contact-links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.75rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  min-width: 240px;
}

.contact-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.contact-card svg {
  width: 22px;
  height: 22px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-card div {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.contact-label {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.contact-value {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
}

/* ===========================
   Footer
=========================== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
}

.site-footer p {
  font-size: 0.875rem;
  color: var(--color-text-faint);
  text-align: center;
}

/* ===========================
   Responsive
=========================== */
@media (max-width: 900px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 0 1.25rem;
  }

  .section {
    padding: 4rem 0;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    gap: 1.25rem;
  }

  .interest-list {
    grid-template-columns: 1fr;
  }

  .hero-content {
    padding-top: 2rem;
  }

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

  .contact-card {
    min-width: unset;
  }
}