/* ==========================================================================
   Base Design System & CSS Variables
   ========================================================================== */
:root {
  --bg-primary: #0a0d12;
  --bg-secondary: #12161f;
  --bg-card: #181e2a;
  --bg-card-hover: #1f2737;
  
  --text-main: #f0f4f8;
  --text-muted: #94a3b8;
  --text-highlight: #38bdf8;
  
  --accent-primary: #0284c7;
  --accent-hover: #0369a1;
  --accent-glow: rgba(56, 189, 248, 0.15);
  
  --border-color: #263142;
  --border-focus: #38bdf8;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition-fast: 0.2s ease;
}

/* ==========================================================================
   Global Resets & Structure
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.container-narrow {
  max-width: 680px;
}

/* ==========================================================================
   Typography & Reusable Utilities
   ========================================================================== */
h1, h2, h3 {
  color: var(--text-main);
  line-height: 1.25;
  font-weight: 700;
}

p {
  color: var(--text-muted);
}

.section {
  padding: 80px 0;
}

.bg-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-title {
  font-size: 2rem;
  margin-bottom: 32px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  margin-top: -16px;
  margin-bottom: 32px;
}

.text-center {
  text-align: center;
}

.badge {
  display: inline-block;
  background-color: var(--accent-glow);
  color: var(--text-highlight);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

/* Buttons */
.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
}

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

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

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

.btn-secondary:hover {
  background-color: var(--bg-card);
  border-color: var(--text-muted);
}

.btn-full {
  width: 100%;
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 13, 18, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

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

.nav-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

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

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  padding: 100px 0 80px 0;
}

.hero h1 {
  font-size: 2.75rem;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  max-width: 850px;
}

.hero-bio {
  font-size: 1.15rem;
  max-width: 760px;
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ==========================================================================
   Grids & Cards
   ========================================================================== */
.grid {
  display: grid;
  gap: 24px;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.4);
  background-color: var(--bg-card-hover);
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.card-tag {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-highlight);
  font-weight: 700;
  margin-bottom: 8px;
  display: block;
}

.card-featured p {
  margin-bottom: 20px;
}

/* Tech Stack Tags */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.tech-stack li {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.8rem;
  padding: 4px 10px;
  border-radius: 4px;
}

/* ==========================================================================
   Career Timeline
   ========================================================================== */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 24px;
  border-left: 2px solid var(--border-color);
  padding-left: 24px;
  margin-left: 8px;
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  border: 3px solid var(--bg-primary);
}

.timeline-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 6px;
  flex-wrap: wrap;
  gap: 8px;
}

.timeline-role {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
}

.timeline-date {
  font-size: 0.85rem;
  color: var(--text-highlight);
  font-weight: 600;
}

/* ==========================================================================
   Contact Form
   ========================================================================== */
.contact-form {
  background-color: var(--bg-card);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--border-focus);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  margin-top: auto;
  padding: 32px 0;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-note {
  color: var(--text-muted);
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .nav-links {
    display: none; /* Can be expanded into a mobile drawer if desired */
  }

  .footer-container {
    flex-direction: column;
    text-align: center;
  }
}