/* =========================================
   Variables
   ========================================= */
:root {
  color-scheme: dark;
  --font-body: 'Fira Code', 'Source Code Pro', 'JetBrains Mono', Menlo, Consolas, monospace;
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-elevated: #233048;
  --color-text: #e2e8f0;
  --color-muted: #94a3b8;
  --color-accent: #38bdf8;
  --color-accent-contrast: #0b1120;
  --color-border: #334155;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.45);
  --radius: 12px;
  --max-width: 960px;
  --transition: 200ms ease;
}

[data-theme="light"] {
  color-scheme: light;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-elevated: #e2e8f0;
  --color-text: #0f172a;
  --color-muted: #475569;
  --color-accent: #2563eb;
  --color-accent-contrast: #f8fafc;
  --color-border: #cbd5f5;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
}

/* =========================================
   Base Styles
   ========================================= */
* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover,
a:focus-visible {
  color: #7dd3fc;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

h1, h2, h3 {
  line-height: 1.2;
  color: var(--color-text);
}

p {
  color: var(--color-text);
  margin-block: 0 1rem;
}

ul {
  padding: 0;
  margin: 0;
  list-style: none;
}

main {
  flex: 1;
  width: 100%;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 16px;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  transition: top var(--transition);
  z-index: 1000;
}

.skip-link:focus {
  top: 16px;
}

/* =========================================
   Layout
   ========================================= */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-header {
  background: linear-gradient(120deg, rgba(56, 189, 248, 0.08), rgba(56, 189, 248, 0));
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 1.5rem 1rem;
}

.branding {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.branding__image {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--color-accent);
}

.branding__name {
  font-size: 1.1rem;
  margin: 0;
}

.branding__title {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: 999px;
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  transform: translateY(-1px);
}

.theme-toggle__icon {
  font-size: 1rem;
}

.theme-toggle__label {
  font-size: 0.85rem;
}

.site-nav {
  border-bottom: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(12px);
}

[data-theme="light"] .site-nav {
  background: rgba(248, 250, 252, 0.85);
}

.site-nav .container {
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  gap: 1.5rem;
  padding: 0.75rem 0;
}

.nav-list a {
  color: var(--color-muted);
  font-size: 0.95rem;
  position: relative;
}

.nav-list a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: transparent;
  transition: background var(--transition);
}

.nav-list a.is-active,
.nav-list a:hover,
.nav-list a:focus-visible {
  color: var(--color-text);
}

.nav-list a.is-active::after {
  background: var(--color-accent);
}

.site-main {
  padding: 2.5rem 0 4rem;
}

.hero {
  padding: 2.5rem;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.18), rgba(56, 189, 248, 0));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.hero::before {
  content: '';
  position: absolute;
  inset: -50%;
  background:
    radial-gradient(circle at 20% 30%, rgba(56, 189, 248, 0.38), transparent 65%),
    radial-gradient(circle at 80% 20%, rgba(56, 189, 248, 0.22), transparent 60%),
    radial-gradient(circle at 50% 85%, rgba(59, 130, 246, 0.26), transparent 65%);
  filter: blur(48px);
  opacity: 0.9;
  animation: hero-flow 18s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: -1;
}

@keyframes hero-flow {
  0% {
    transform: translate3d(-8%, -6%, 0) scale(1);
  }
  50% {
    transform: translate3d(6%, 4%, 0) scale(1.08);
  }
  100% {
    transform: translate3d(-4%, 8%, 0) scale(1.02);
  }
}

.hero h1 {
  font-size: clamp(2.5rem, 4vw, 3.25rem);
  margin-bottom: 1rem;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.panel {
  margin-top: 2.5rem;
  padding: 2rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
}

.lede {
  color: var(--color-muted);
  font-size: 1.1rem;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.features {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tags li {
  padding: 0.35rem 0.9rem;
  background: var(--color-elevated);
  border-radius: 999px;
  border: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.now-grid {
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

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

.contact-list {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.contact-list a {
  font-weight: 600;
}

.blog-list {
  display: grid;
  gap: 2rem;
}

.blog-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.blog-card h2 {
  margin: 0 0 0.5rem;
}

.blog-card time {
  color: var(--color-muted);
  font-size: 0.85rem;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 1rem;
  font-size: 0.95rem;
}

.read-more::after {
  content: '→';
  transition: transform var(--transition);
}

.read-more:hover::after,
.read-more:focus-visible::after {
  transform: translateX(3px);
}

.post {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  padding: clamp(1.5rem, 4vw, 2.75rem);
  box-shadow: var(--shadow);
}

.post__header {
  margin-bottom: 2rem;
}

.post__meta {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.post__footer {
  margin-top: 2.5rem;
  border-top: 1px solid var(--color-border);
  padding-top: 1.5rem;
  color: var(--color-muted);
}

.post__more {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px dashed var(--color-border);
}

.post__more h2 {
  margin-top: 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  font-weight: 600;
  border: none;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button--ghost {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  box-shadow: none;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(8px);
}

.site-footer p {
  margin: 0;
  color: var(--color-muted);
  text-align: center;
}

/* =========================================
   Resume Layout
   ========================================= */
.resume {
  background: none;
  gap: 2rem;
}

.resume__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
}

.resume__header h1 {
  margin: 0;
}

.resume__contact {
  display: grid;
  gap: 0.35rem;
  font-size: 0.95rem;
}

.resume__section + .resume__section {
  margin-top: 2rem;
}

.resume__item + .resume__item {
  margin-top: 1.5rem;
}

.resume__item h3 {
  margin: 0 0 0.35rem;
}

.resume__meta {
  margin: 0 0 0.75rem;
  color: var(--color-muted);
}

.resume__grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.print-hidden {
  display: block;
}

/* =========================================
   Utilities
   ========================================= */
@media (max-width: 720px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .nav-list {
    flex-wrap: wrap;
    justify-content: center;
  }

  .resume__header {
    flex-direction: column;
  }

  .hero {
    padding: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* =========================================
   Print Styles
   ========================================= */
@media print {
  :root {
    color-scheme: light;
    --color-bg: #ffffff;
    --color-surface: #ffffff;
    --color-text: #000000;
    --color-muted: #333333;
    --color-border: #d1d5db;
    --color-accent: #000000;
  }

  body {
    background: #ffffff;
    color: #000000;
  }

  .print-hidden {
    display: none !important;
  }

  .site-main.resume {
    padding: 0;
  }

  .resume__section {
    page-break-inside: avoid;
  }

  a {
    color: inherit;
  }
}