:root {
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-surface-alt: #172133;
  --color-primary: #ff9900;
  --color-secondary: #14b8a6;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-border: #334155;
  --shadow-color: rgba(15, 23, 42, 0.3);
  --focus: #fbbf24;
  --font-ui: "Source Code Pro", "Cascadia Code", Consolas, Menlo, Monaco, monospace;
  --container-max: 1200px;
  --container-padding: 20px;
  --section-padding: 100px;
  --radius: 12px;
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --transition-fast: all 0.3s ease;
  --transition-slow: all 0.5s ease;
  --transition-reveal: all 0.8s ease;
}

* {
  box-sizing: border-box;
}

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

body {
  background: radial-gradient(circle at 15% 10%, #16223a 0%, var(--color-bg) 42%);
  color: var(--color-text);
  font-family: var(--font-ui);
  line-height: 1.6;
  letter-spacing: 0.01em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

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

h1,
h2,
h3,
h4 {
  color: var(--color-text);
  line-height: 1.2;
  font-weight: 700;
  margin-top: 0;
}

p {
  margin: 0 0 var(--space-3);
}

a {
  color: var(--color-secondary);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 2px;
  transition: var(--transition-fast);
}

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

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
}

.skip-link:focus {
  left: var(--space-3);
  top: var(--space-3);
  background: var(--color-primary);
  color: #111827;
  padding: var(--space-2) var(--space-3);
  border-radius: 8px;
  z-index: 100;
}

.container {
  width: min(100% - (var(--container-padding) * 2), var(--container-max));
  margin-inline: auto;
}

.site-header {
  background: rgba(15, 23, 42, 0.88);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-inner {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.brand {
  color: var(--color-text);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
}

.menu-toggle {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: 10px;
  padding: 0.45rem 0.75rem;
  font: inherit;
  transition: var(--transition-fast);
}

.menu-toggle:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.primary-nav {
  display: none;
  width: 100%;
}

.primary-nav[data-open="true"] {
  display: block;
}

.primary-nav ul {
  list-style: none;
  margin: var(--space-2) 0 var(--space-3);
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.primary-nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-weight: 600;
  position: relative;
  padding-bottom: 0.2rem;
}

.primary-nav a[aria-current="page"] {
  color: var(--color-primary);
}

.primary-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.1rem;
  width: 0;
  height: 2px;
  background: var(--color-secondary);
  transition: width 0.3s ease;
}

.primary-nav a:hover::after,
.primary-nav a[aria-current="page"]::after {
  width: 100%;
}

.hero {
  min-height: calc(100vh - 74px);
  display: grid;
  place-items: center;
  padding: var(--section-padding) 0;
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(circle at 80% 20%, rgba(20, 184, 166, 0.12), transparent 35%),
    radial-gradient(circle at 20% 80%, rgba(255, 153, 0, 0.14), transparent 40%);
}

.eyebrow {
  margin: 0 0 var(--space-2);
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 700;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
  background: linear-gradient(90deg, var(--color-primary), #ffc266);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  max-width: 22ch;
  margin-bottom: var(--space-3);
}

.lead {
  color: var(--color-text-muted);
  max-width: 64ch;
}

.button {
  display: inline-block;
  margin-top: var(--space-3);
  border-radius: 10px;
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #111827;
  text-decoration: none;
  font-weight: 700;
  padding: 0.68rem 1.05rem;
  transition: var(--transition-fast);
}

.button:hover {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
  color: #022c22;
  transform: translateY(-2px);
}

.section {
  padding: var(--section-padding) 0;
}

.section:nth-of-type(odd) {
  background: transparent;
}

.section:nth-of-type(even) {
  background: var(--color-surface-alt);
}

.section-heading {
  margin-bottom: var(--space-3);
  text-align: center;
}

.section-heading h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 0.25rem;
}

.section-heading::after {
  content: "";
  display: block;
  width: 90px;
  height: 2px;
  margin: 0.5rem auto 0;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
}

.blog-main,
.post-layout {
  padding: var(--section-padding) 0;
}

.post-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.search-label {
  display: inline-block;
  margin-bottom: var(--space-1);
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.search-input {
  width: 100%;
  max-width: 520px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 0.68rem 0.82rem;
  font: inherit;
  color: var(--color-text);
  background: #0b1322;
  transition: var(--transition-fast);
}

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

.search-input:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-color: var(--color-secondary);
}

.post-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: 0 10px 24px var(--shadow-color);
  transition: var(--transition-fast);
}

.post-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-secondary);
}

.post-card h2 {
  margin-bottom: var(--space-1);
}

.meta {
  color: var(--color-secondary);
  font-size: 0.93rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: var(--space-2);
}

.tag {
  border-radius: 999px;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  background: rgba(20, 184, 166, 0.08);
  padding: 0.13rem 0.58rem;
  font-size: 0.82rem;
  transition: var(--transition-fast);
}

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

.post-article {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-5);
  box-shadow: 0 12px 30px var(--shadow-color);
  animation: reveal 0.8s ease both;
}

.post-article hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--space-4) 0;
}

.post-article blockquote {
  margin: var(--space-3) 0;
  padding: 0.1rem 0 0.1rem var(--space-3);
  border-left: 3px solid var(--color-primary);
  color: var(--color-text-muted);
  background: rgba(255, 153, 0, 0.08);
}

.post-article pre {
  overflow-x: auto;
  margin: var(--space-3) 0;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: #0b1220;
  color: #dbeafe;
  padding: var(--space-3);
}

.post-article :not(pre) > code {
  border-radius: 5px;
  border: 1px solid var(--color-border);
  background: #0e1a2d;
  color: #7dd3fc;
  padding: 0.09rem 0.34rem;
}

.post-article table {
  width: 100%;
  margin: var(--space-3) 0;
  border-collapse: collapse;
  font-size: 0.97rem;
}

.post-article th,
.post-article td {
  text-align: left;
  border: 1px solid var(--color-border);
  padding: 0.52rem;
}

.post-article thead th {
  color: var(--color-primary);
  background: #132032;
}

.post-nav {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-5);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: #0b1322;
  color: var(--color-text-muted);
}

.footer-inner {
  min-height: 68px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

@media (min-width: 760px) {
  .header-inner {
    min-height: 74px;
  }

  .menu-toggle {
    display: none;
  }

  .primary-nav {
    display: block;
    width: auto;
  }

  .primary-nav ul {
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-4);
  }

  .hero {
    min-height: calc(100vh - 74px);
  }
}

@media (max-width: 759px) {
  .hero {
    min-height: auto;
    padding: 88px 0 74px;
  }

  .button {
    display: block;
    width: fit-content;
  }

  .section,
  .blog-main,
  .post-layout {
    padding: 70px 0;
  }

  .post-article {
    padding: var(--space-4);
  }
}

@keyframes reveal {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}