/* ============================================
   VAYU TECHNOLOGY — Site Stylesheet
   Warm neutral editorial theme
   ============================================ */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Outfit:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* --- Custom Properties --- */
:root {
  --color-bg: #f6f1eb;
  --color-surface: #efe9e1;
  --color-surface-raised: #e8e0d6;
  --color-border: #d4cac0;
  --color-border-subtle: #ddd5cb;
  --color-text: #2c2824;
  --color-text-secondary: #6b6259;
  --color-text-muted: #9a9089;
  --color-accent: #b45327;
  --color-accent-dim: rgba(180, 83, 39, 0.1);
  --color-link: #b45327;
  --color-link-hover: #8f3f1b;
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'Outfit', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-width: 1200px;
  --content-width: 720px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;
  --radius: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

::selection {
  background: var(--color-accent);
  color: #fff;
}

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

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

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

/* --- Noise texture overlay --- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  opacity: 0.018;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
}

/* --- Layout --- */
.site-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.content-container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* --- Navigation --- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 241, 235, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-subtle);
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}

.site-logo:hover {
  color: var(--color-text);
}

.site-logo .logo-mark {
  width: 32px;
  height: 32px;
  background: var(--color-accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1rem;
  color: #fff;
  font-weight: 400;
  font-style: italic;
  flex-shrink: 0;
}

.site-logo .logo-text {
  display: flex;
  flex-direction: column;
}

.site-logo .logo-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.2;
}

.site-logo .logo-tagline {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--transition);
}

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

.nav-links .nav-cta {
  background: var(--color-accent);
  color: #fff;
  padding: 0.5rem 1.2rem;
  border-radius: 100px;
  font-weight: 500;
}

.nav-links .nav-cta:hover {
  background: var(--color-link-hover);
  color: #fff;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: var(--transition);
}

/* --- Hero --- */
.hero {
  padding: var(--space-lg) 0 var(--space-md);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-accent-dim) 0%, transparent 70%);
  pointer-events: none;
  animation: drift 20s ease-in-out infinite alternate;
}

@keyframes drift {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-100px, 80px) scale(1.1); }
  100% { transform: translate(50px, -40px) scale(0.95); }
}

.hero .container {
  position: relative;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: fadeUp 0.8s ease forwards;
}

.hero-label::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--color-accent);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--color-text);
  max-width: 800px;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.1s forwards;
}

.hero h1 em {
  font-style: italic;
  color: var(--color-accent);
}

.hero-description {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  max-width: 520px;
  margin-top: var(--space-md);
  line-height: 1.7;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.2s forwards;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Section Headers --- */
.section {
  padding: var(--space-lg) 0;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-text);
}

.section-link {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --- Post Cards (Homepage Grid) --- */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-md);
}

.post-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  padding: var(--space-md);
  transition: border-color var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.post-card:hover {
  border-color: var(--color-border);
  transform: translateY(-2px);
}

.post-card-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
}

.post-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

.post-card h3 a {
  color: var(--color-text);
  transition: color var(--transition);
}

.post-card h3 a:hover {
  color: var(--color-accent);
}

.post-card-excerpt {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.65;
  flex-grow: 1;
}

.post-card-read {
  margin-top: var(--space-sm);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.post-card-read::after {
  content: '\2192';
  transition: transform var(--transition);
}

.post-card:hover .post-card-read::after {
  transform: translateX(4px);
}

/* --- Blog List Page --- */
.blog-list {
  padding: 0;
}

.blog-list-item {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-subtle);
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-md);
  align-items: baseline;
}

.blog-list-item:first-child {
  padding-top: 0;
}

.blog-list-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding-top: 0.2rem;
}

.blog-list-content h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.25;
  margin-bottom: 0.5rem;
}

.blog-list-content h2 a {
  color: var(--color-text);
}

.blog-list-content h2 a:hover {
  color: var(--color-accent);
}

.blog-list-content p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* --- Post/Article Page --- */
.post-header {
  padding: var(--space-md) 0 var(--space-sm);
}

.post-header-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.post-header h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
  max-width: var(--content-width);
}

.post-body {
  padding-bottom: var(--space-xl);
}

.post-body .content-container {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.post-body h1,
.post-body h2,
.post-body h3,
.post-body h4 {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--color-text);
  margin-top: var(--space-md);
  margin-bottom: var(--space-sm);
}

.post-body h2 { font-size: 1.6rem; }
.post-body h3 { font-size: 1.3rem; }

.post-body p {
  margin-bottom: var(--space-sm);
}

.post-body a {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-accent-dim);
}

.post-body a:hover {
  text-decoration-color: var(--color-accent);
}

.post-body img {
  border-radius: var(--radius);
  margin: var(--space-md) 0;
}

.post-body ul,
.post-body ol {
  margin: 0 0 var(--space-sm) var(--space-md);
}

.post-body li {
  margin-bottom: 0.4rem;
}

.post-body blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-md);
  margin: var(--space-md) 0;
  color: var(--color-text);
  font-style: italic;
}

.post-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-surface-raised);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

.post-body pre {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius);
  padding: var(--space-sm) var(--space-md);
  overflow-x: auto;
  margin: var(--space-md) 0;
}

.post-body pre code {
  background: none;
  padding: 0;
}

.post-nav {
  border-top: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  margin-top: var(--space-lg);
}

.post-nav a {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --- Page Title (for blog, jobs, etc.) --- */
.page-header {
  padding: var(--space-md) 0 var(--space-sm);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-sm);
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 400;
  letter-spacing: -0.02em;
}

.page-header p {
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
  font-size: 1.05rem;
}

/* --- Tags --- */
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: var(--space-sm);
}

.post-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  color: var(--color-text-secondary);
  transition: border-color var(--transition), color var(--transition);
}

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

/* --- Pagination --- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-md) 0 var(--space-sm);
}

.pagination a {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.pagination-info {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* --- Jobs Page --- */
.jobs-empty {
  text-align: center;
  padding: var(--space-xl) 0;
  color: var(--color-text-secondary);
}

.jobs-empty a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --- 404 --- */
.page-404 {
  text-align: center;
  padding: var(--space-xl) 0;
}

.page-404 h1 {
  font-family: var(--font-display);
  font-size: 8rem;
  color: var(--color-border);
  line-height: 1;
}

.page-404 p {
  color: var(--color-text-secondary);
  margin-top: var(--space-sm);
}

/* --- Footer --- */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border-subtle);
  padding: var(--space-lg) 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.footer-links a {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

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

/* --- Responsive --- */
@media (max-width: 768px) {
  .hero {
    padding: var(--space-lg) 0 var(--space-md);
  }

  .hero::before {
    width: 300px;
    height: 300px;
    top: -100px;
    right: -100px;
  }

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

  .blog-list-item {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(246, 241, 235, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--space-md);
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-sm);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .footer-inner {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .section-header {
    flex-direction: column;
    gap: var(--space-xs);
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2.2rem;
  }

  .post-card {
    padding: 1.5rem;
  }
}