@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  --bg: #09090b;
  --bg-secondary: #18181b;
  --bg-tertiary: #27272a;
  --panel: rgba(24, 24, 27, 0.8);
  --panel-solid: rgba(24, 24, 27, 0.95);
  --panel-border: rgba(63, 63, 70, 0.5);
  --panel-border-hover: rgba(82, 82, 91, 0.8);
  --text: #fafafa;
  --text-secondary: #e4e4e7;
  --muted: #a1a1aa;
  --primary: #22d3ee;
  --primary-glow: rgba(34, 211, 238, 0.25);
  --primary-subtle: rgba(34, 211, 238, 0.1);
  --shadow: rgba(0, 0, 0, 0.6);
  --glass-bg: rgba(24, 24, 27, 0.7);
  --glass-border: rgba(63, 63, 70, 0.4);
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Subtle gradient background */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(34, 211, 238, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(39, 39, 42, 0.5), transparent);
  pointer-events: none;
  z-index: -1;
}

/* Subtle grid overlay */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(rgba(63, 63, 70, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(63, 63, 70, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse 80% 50% at 50% 0%, black, transparent);
  pointer-events: none;
  z-index: -1;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

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

/* =============== HEADER / NAVIGATION =============== */
.site-header {
  position: sticky;
  top: 1rem;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: min(1200px, calc(100% - 2rem));
  margin: 1rem auto 0;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-xl);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: var(--glass-bg);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
  transition: all var(--transition-base);
}

.site-header:hover {
  border-color: var(--panel-border-hover);
}

.brand {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
  transition: opacity var(--transition-fast);
}

.brand:hover {
  opacity: 0.8;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.site-nav a {
  position: relative;
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid transparent;
  border-radius: var(--border-radius-md);
  padding: 0.5rem 0.875rem;
  transition: all var(--transition-fast);
}

.site-nav a:hover {
  color: var(--text);
  background: var(--bg-tertiary);
}

.site-nav a.active {
  color: var(--bg);
  background: var(--primary);
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: 1px solid var(--glass-border);
  background: var(--bg-secondary);
  color: var(--text);
  border-radius: var(--border-radius-md);
  padding: 0.625rem 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.menu-toggle:hover {
  background: var(--bg-tertiary);
  border-color: var(--panel-border-hover);
}

/* =============== CONTAINER =============== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* =============== HERO SECTION =============== */
.hero {
  position: relative;
  overflow: hidden;
  margin: 1.5rem 0 2rem;
  padding: 4rem 2.5rem;
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-xl);
  background: var(--bg-secondary);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* Subtle glow effect */
.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--primary-glow), transparent 70%);
  filter: blur(80px);
  opacity: 0.5;
  pointer-events: none;
}

.hero-compact {
  padding: 2.5rem 2rem;
}

.hero h1 {
  position: relative;
  margin: 0.5rem 0 1.25rem;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text);
}

.hero p {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: 1.125rem;
  line-height: 1.8;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
}

.hero-kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

/* Typing animation line */
.typing-line {
  margin-top: 1.25rem;
  min-height: 1.75rem;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 1rem;
  color: var(--primary);
}

.typing-cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  margin-left: 2px;
  background: var(--primary);
  animation: cursor-blink 1s steps(1) infinite;
  vertical-align: text-bottom;
}

/* Skills chips */
.skills-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-top: 1.5rem;
}

.skill-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--muted);
  background: var(--bg-tertiary);
  transition: all var(--transition-fast);
  cursor: default;
}

.skill-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-subtle);
}

/* =============== BUTTONS =============== */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: var(--border-radius-md);
  padding: 0.875rem 1.5rem;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--primary);
  color: var(--bg);
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
  box-shadow: 0 8px 25px var(--primary-glow);
}

.btn-primary:visited,
.btn-primary:hover,
.btn-primary:active,
.btn-primary:focus-visible {
  color: var(--bg);
}

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

.btn-secondary:hover {
  border-color: var(--panel-border-hover);
  background: var(--bg-tertiary);
}

.btn-secondary:visited,
.btn-secondary:hover,
.btn-secondary:active,
.btn-secondary:focus-visible {
  color: var(--text);
}

.btn-back {
  margin-bottom: 1rem;
}

/* =============== PANELS =============== */
.panel {
  position: relative;
  margin: 1.5rem 0;
  padding: 1.5rem;
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  background: var(--bg-secondary);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.4);
  transition: all var(--transition-base);
}

.panel:hover {
  border-color: var(--panel-border-hover);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.panel-head h2 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.panel-head a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  transition: color var(--transition-fast);
}

.panel-head a:hover {
  color: var(--primary);
}

/* =============== CARD GRID =============== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

/* =============== CARDS =============== */
.card {
  position: relative;
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  background: var(--bg-tertiary);
  padding: 1.25rem;
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--panel-border-hover);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
}

.card-clickable {
  cursor: pointer;
}

.card-clickable:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--text);
  transition: color var(--transition-fast);
}

.card:hover h3 {
  color: var(--primary);
}

.card p {
  margin: 0.5rem 0 1rem;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.8125rem;
}

/* =============== TAGS =============== */
.tags-wrap {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--muted);
  background: var(--bg-tertiary);
  transition: all var(--transition-fast);
}

.tag:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* =============== EMPTY STATE =============== */
.empty-state {
  padding: 2rem;
  border: 1px dashed var(--panel-border);
  border-radius: var(--border-radius-md);
  color: var(--muted);
  font-size: 0.9375rem;
  text-align: center;
}

/* =============== SEARCH =============== */
.search-label {
  display: block;
  margin-bottom: 0.625rem;
  color: var(--muted);
  font-weight: 500;
}

.search-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: var(--border-radius-md);
  padding: 0.875rem 1rem;
  font-size: 1rem;
  margin-bottom: 0.5rem;
  transition: all var(--transition-fast);
}

.search-input::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-subtle);
}

/* =============== META LINE =============== */
.meta-line {
  margin: 0.25rem 0 1.25rem;
  color: var(--muted);
  font-size: 0.9375rem;
}

/* =============== PROSE / CONTENT =============== */
.prose h2,
.prose h3 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.prose h2 {
  font-size: 1.5rem;
}

.prose h3 {
  font-size: 1.25rem;
}

.prose p,
.prose li {
  color: var(--text-secondary);
  line-height: 1.8;
}

.prose pre {
  overflow-x: auto;
  margin: 1.25rem 0;
  padding: 1.25rem;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--panel-border);
  background: var(--bg);
}

.prose code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

.prose pre code {
  color: var(--primary);
  font-size: 0.875rem;
  line-height: 1.7;
}

.prose :not(pre) > code {
  background: var(--bg-tertiary);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 0.125rem 0.375rem;
  color: var(--primary);
  font-size: 0.875em;
}

/* =============== ABOUT SECTION =============== */
.about-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.about-stat {
  border: 1px solid var(--panel-border);
  border-radius: var(--border-radius-md);
  padding: 1.25rem;
  background: var(--bg-tertiary);
  transition: all var(--transition-base);
}

.about-stat:hover {
  border-color: var(--panel-border-hover);
  transform: translateY(-2px);
}

.about-stat strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

.about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* =============== FOOTER =============== */
.site-footer {
  position: relative;
  margin-top: 3rem;
  border-top: 1px solid var(--panel-border);
  color: var(--muted);
  font-size: 0.875rem;
  text-align: center;
  padding: 1.5rem 1rem 2rem;
}

.footer-copy {
  margin: 0;
  line-height: 1.5;
}

.footer-links {
  margin-top: 0.75rem;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--muted);
  background: var(--bg-secondary);
  transition: all var(--transition-fast);
}

.footer-link:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.footer-link svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* =============== REVEAL ANIMATIONS =============== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: 
    opacity 500ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 500ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered card animations */
.card-grid .card:nth-child(1) { transition-delay: 0ms; }
.card-grid .card:nth-child(2) { transition-delay: 50ms; }
.card-grid .card:nth-child(3) { transition-delay: 100ms; }
.card-grid .card:nth-child(4) { transition-delay: 150ms; }
.card-grid .card:nth-child(5) { transition-delay: 200ms; }
.card-grid .card:nth-child(6) { transition-delay: 250ms; }

/* =============== MOBILE RESPONSIVE =============== */
@media (max-width: 1080px) {
  .menu-toggle {
    display: inline-flex;
  }

  .site-header {
    top: 0.5rem;
    width: calc(100% - 1rem);
    padding: 0.625rem 1rem;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    padding: 1rem;
    border: 1px solid var(--panel-border);
    border-radius: var(--border-radius-lg);
    background: var(--panel-solid);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  }

  .site-nav.open {
    display: flex;
    animation: slideDown 250ms cubic-bezier(0.16, 1, 0.3, 1);
  }

  .site-nav a {
    padding: 0.75rem 1rem;
  }
}

@media (max-width: 680px) {
  .container {
    padding: 1rem;
  }

  .hero {
    padding: 2.5rem 1.5rem;
    margin: 1rem 0;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero p {
    font-size: 1rem;
  }

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

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-actions {
    flex-direction: column;
  }
}

/* =============== REDUCED MOTION =============== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

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

/* =============== KEYFRAME ANIMATIONS =============== */
@keyframes cursor-blink {
  0%, 50% {
    opacity: 1;
  }
  51%, 100% {
    opacity: 0;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =============== SELECTION STYLING =============== */
::selection {
  background: var(--primary-subtle);
  color: var(--text);
}

::-moz-selection {
  background: var(--primary-subtle);
  color: var(--text);
}

/* =============== SCROLLBAR STYLING =============== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 5px;
  border: 2px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--muted);
}

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--bg-tertiary) var(--bg);
}

/* =============== FOCUS STYLES =============== */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}