/* ============================================================================
   Core Imports
   ============================================================================ */

@import url('../css/core/_variables.css');
@import url('../css/core/_container-queries.css');
@import url('../css/core/_animations.css');
@import url('../css/core/_utilities.css');
@import url('../css/components/_navigation.css');

/* ============================================================================
   Base Styles & Reset (Matching landing.css)
   ============================================================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  overflow-x: hidden;
  max-width: 100vw;
}

nav {
  --nav-extra-offset: clamp(0.75rem, 2vh, 1.5rem);
}

@media (min-width: 800px) {
  nav.nav-scrolled {
    left: 50% !important;
    right: auto !important;
    transform: translateX(-50%) !important;
    width: fit-content !important;
    max-width: min(95vw, 1200px) !important;
    padding: 0.75rem 2rem !important;
  }

  nav.nav-scrolled .nav-content {
    gap: clamp(1.5rem, 4vw, 3rem);
  }
}

:root {
  --page-bg: radial-gradient(circle at 10% 20%, rgba(56, 189, 248, 0.15), transparent 55%),
    radial-gradient(circle at 85% 15%, rgba(16, 185, 129, 0.18), transparent 60%),
    radial-gradient(circle at 70% 80%, rgba(236, 72, 153, 0.16), transparent 60%),
    linear-gradient(180deg, rgba(10, 15, 26, 0.98), rgba(8, 12, 20, 0.98));
  --blog-body-font: 'Source Serif 4', 'Iowan Old Style', 'Palatino', 'Times New Roman', serif;
  --text-shadow-soft: 0 1px 0 rgba(0, 0, 0, 0.35);
}

html[data-theme="light"] {
  --page-bg: radial-gradient(circle at 12% 18%, rgba(56, 189, 248, 0.12), transparent 55%),
    radial-gradient(circle at 85% 15%, rgba(16, 185, 129, 0.12), transparent 60%),
    radial-gradient(circle at 70% 80%, rgba(236, 72, 153, 0.1), transparent 60%),
    linear-gradient(180deg, rgba(248, 250, 252, 0.98), rgba(226, 232, 240, 0.98));
  --text-shadow-soft: 0 1px 0 rgba(255, 255, 255, 0.7);
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--page-bg);
  color: var(--text-primary);
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

main {
  padding-top: clamp(7rem, 12vh, 10rem);
  padding-bottom: clamp(2rem, 6vh, 4rem);
}

h1 {
  margin: 0 0 clamp(0.75rem, 2vw, 1.25rem);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
  text-wrap: balance;
}

h2 {
  margin: 0 0 clamp(0.65rem, 1.5vw, 1rem);
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

h3 {
  margin: 0 0 clamp(0.5rem, 1vw, 0.75rem);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.35;
}

p {
  margin: 0 0 clamp(1rem, 2vw, 1.4rem);
  color: var(--text-secondary);
  line-height: 1.65;
  font-size: clamp(0.95rem, 1.8vw, 1.05rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-cyan);
}

/* ============================================================================
   Hero Section
   ============================================================================ */

.blog-hero {
  padding-bottom: clamp(3rem, 6vh, 5rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.hero-card {
  padding: clamp(2rem, 4.5vw, 3rem);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 2.5vw, 1.5rem);
  isolation: isolate;
  position: relative;
  box-shadow: var(--shadow-glass);
  overflow: hidden;
}

.hero-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent 55%),
    radial-gradient(circle at bottom right, rgba(16, 185, 129, 0.16), transparent 60%);
  opacity: 0.7;
  z-index: -1;
}

.hero-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, rgba(56, 189, 248, 0.65), rgba(16, 185, 129, 0.6), rgba(236, 72, 153, 0.55));
  opacity: 0.7;
  z-index: -1;
}

html[data-theme="light"] .hero-card::before {
  opacity: 0.45;
}

html[data-theme="light"] .hero-card::after {
  opacity: 0.5;
}

.hero-card h1 {
  max-width: 26ch;
}

.hero-card p {
  max-width: 62ch;
}

/* ============================================================================
   Blog Posts Grid
   ============================================================================ */

.blog-posts {
  padding: clamp(3rem, 6vh, 5rem) 0;
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 360px), 1fr));
  gap: clamp(1.5rem, 3vw, 2rem);
}

.post-card {
  padding: clamp(1.5rem, 3.5vw, 2rem);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  gap: clamp(0.75rem, 1.8vw, 1rem);
  height: 100%;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
  position: relative;
  isolation: isolate;
  text-decoration: none;
  color: inherit;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: linear-gradient(
    135deg,
    rgba(42, 47, 56, 0.6) 0%,
    rgba(32, 37, 46, 0.75) 100%
  );
  transform-origin: center;
  --accent-color-1: var(--accent-cyan);
  --accent-color-2: var(--accent-green);
  --accent-rgb: 56, 189, 248;
}

.post-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.05), rgba(16, 185, 129, 0.08));
  z-index: -1;
  opacity: 0.6;
  transition: opacity 0.22s ease;
}

html[data-theme="light"] .post-card::before {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.8), rgba(248, 250, 252, 0.9));
}

html[data-theme="light"] .post-card {
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.9) 0%,
    rgba(248, 250, 252, 0.95) 100%
  );
  border-color: rgba(15, 23, 42, 0.08);
}

.post-card::after {
  content: '';
  position: absolute;
  inset: 1px;
  border-radius: calc(var(--radius-xl) - 1px);
  border: 1px solid transparent;
  background:
    linear-gradient(135deg, rgba(56, 189, 248, 0.45), rgba(59, 130, 246, 0.25)) border-box;
  -webkit-mask:
    linear-gradient(#000 0 0) padding-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.22s ease;
  pointer-events: none;
}

.post-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-color-1);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    0 12px 28px rgba(0, 0, 0, 0.35),
    0 0 24px rgba(var(--accent-rgb), 0.14);
}

.post-card:hover::before {
  opacity: 0.9;
}

.post-card:hover::after {
  opacity: 1;
}

html[data-theme="light"] .post-card::after {
  background:
    linear-gradient(135deg, rgba(14, 165, 233, 0.45), rgba(59, 130, 246, 0.35)) border-box;
}

.post-card:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 4px;
}

.post-card:nth-child(1) {
  --accent-color-1: var(--accent-cyan);
  --accent-color-2: var(--accent-blue);
  --accent-rgb: 56, 189, 248;
}

.post-card:nth-child(2) {
  --accent-color-1: var(--accent-blue);
  --accent-color-2: var(--accent-purple);
  --accent-rgb: 59, 130, 246;
}

.post-card:nth-child(3) {
  --accent-color-1: var(--accent-orange);
  --accent-color-2: var(--accent-red);
  --accent-rgb: 251, 146, 60;
}

.post-card:nth-child(4) {
  --accent-color-1: var(--accent-purple);
  --accent-color-2: var(--accent-cyan);
  --accent-rgb: 168, 85, 247;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.meta-separator {
  opacity: 0.5;
}

.post-card h3 {
  margin-bottom: clamp(0.5rem, 1vw, 0.75rem);
  color: var(--text-primary);
}

.post-card p {
  color: var(--text-secondary);
  margin-bottom: auto;
}

.text-link {
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.text-link:hover {
  color: var(--accent-blue);
}

/* ============================================================================
   Article Page
   ============================================================================ */

.article-hero {
  padding-bottom: clamp(2rem, 4vh, 3rem);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 500;
  margin-bottom: clamp(1.5rem, 3vh, 2.5rem);
  transition: color 0.2s ease;
}

.back-link:hover {
  color: var(--accent-blue);
}

.article-header {
  max-width: min(70ch, 100%);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: clamp(1rem, 2vh, 1.5rem);
}

.article-summary {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  font-weight: 400;
  text-wrap: pretty;
}

.article-body {
  padding-bottom: clamp(4rem, 8vh, 6rem);
}

.article-content {
  max-width: min(72ch, 100%);
  font-size: clamp(1.02rem, 1.6vw, 1.15rem);
  line-height: 1.75;
  color: var(--text-secondary);
  font-family: var(--blog-body-font);
  letter-spacing: 0.005em;
  font-variant-ligatures: common-ligatures;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
  color: var(--text-primary);
  margin-top: clamp(2rem, 4vh, 3rem);
  margin-bottom: clamp(1rem, 2vh, 1.5rem);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  text-wrap: balance;
}

.article-content h1 { font-size: clamp(1.8rem, 3.5vw, 2.4rem); }
.article-content h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
.article-content h3 { font-size: clamp(1.25rem, 2.5vw, 1.6rem); }

.article-content p {
  margin-bottom: clamp(1.25rem, 2.5vh, 1.75rem);
  text-wrap: pretty;
}

.article-content ul,
.article-content ol {
  margin: clamp(1rem, 2vh, 1.5rem) 0;
  padding-left: clamp(1.5rem, 3vw, 2rem);
}

.article-content li {
  margin-bottom: 0.75rem;
  line-height: 1.7;
  text-wrap: pretty;
}

.article-content code {
  background: rgba(255, 255, 255, 0.05);
  padding: 0.2em 0.4em;
  border-radius: 0.25rem;
  font-size: 0.9em;
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
}

html[data-theme="light"] .article-content code {
  background: rgba(0, 0, 0, 0.05);
}

.article-content pre {
  background: rgba(10, 15, 26, 0.6);
  padding: clamp(1rem, 2vw, 1.5rem);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin: clamp(1.5rem, 3vh, 2rem) 0;
}

html[data-theme="light"] .article-content pre {
  background: rgba(248, 250, 252, 0.8);
}

.article-content pre code {
  background: none;
  padding: 0;
}

.article-content a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 0.2s ease;
}

.article-content a:hover {
  color: var(--accent-green);
}

.article-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.article-content blockquote {
  margin: clamp(1.5rem, 3vh, 2rem) 0;
  padding: clamp(1rem, 2vw, 1.5rem);
  border-left: 3px solid rgba(56, 189, 248, 0.5);
  background: rgba(15, 23, 42, 0.35);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
}

html[data-theme="light"] .article-content blockquote {
  background: rgba(255, 255, 255, 0.8);
  border-left-color: rgba(14, 165, 233, 0.6);
}

.article-content hr {
  border: none;
  height: 1px;
  background: rgba(148, 163, 184, 0.2);
  margin: clamp(2rem, 4vh, 3rem) 0;
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  font-style: italic;
}

/* ============================================================================
   Footer (Aligned with core landing styles)
   ============================================================================ */

.site-footer .container {
  container-type: inline-size;
  container-name: footer;
}

.site-footer {
  padding-block: var(--space-lg);
  border-block-start: 1px solid var(--border);
}

.footer-content {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-md);
  margin-block-end: var(--space-md);
}

@container footer (max-width: 480px) {
  .footer-content {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-sm);
  transition: color var(--duration-fast);
  min-block-size: var(--touch-target-min);
  display: inline-flex;
  align-items: center;
}

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

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  inline-size: var(--touch-target-comfortable);
  block-size: var(--touch-target-comfortable);
  padding: 0;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.35);
  color: var(--text-secondary);
  font-size: var(--font-sm);
  cursor: pointer;
  transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease, background var(--duration-fast) ease;
}

html[data-theme="light"] .theme-toggle {
  background: rgba(255, 255, 255, 0.8);
}

.theme-toggle:hover {
  color: var(--text-primary);
  border-color: rgba(16, 185, 129, 0.3);
}

.theme-toggle-icon {
  display: inline-flex;
  position: relative;
  width: 18px;
  height: 18px;
}

.theme-toggle-icon svg {
  position: absolute;
  inset: 0;
  width: 18px;
  height: 18px;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.theme-toggle-icon .icon-sun {
  opacity: 0;
  transform: rotate(-90deg);
}

html[data-theme="light"] .theme-toggle-icon .icon-sun {
  opacity: 1;
  transform: rotate(0deg);
}

html[data-theme="light"] .theme-toggle-icon .icon-moon {
  opacity: 0;
  transform: rotate(90deg);
}

.theme-toggle-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.footer-copy {
  color: var(--text-muted);
  font-size: var(--font-xs);
  text-align: center;
}

.footer-tagline {
  color: var(--text-secondary);
  font-size: var(--font-sm);
  font-style: italic;
  margin-block-end: var(--space-xs);
  text-align: center;
  text-shadow: var(--text-shadow-soft);
}

.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
}