/* ==========================================================================
   Stackframe — Main Stylesheet
   Design system: Space Grotesk (display) + Lora (body) + JetBrains Mono (meta)
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
}

img,
picture,
svg {
  display: block;
  max-width: 100%;
}

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
  color: inherit;
}

/* ---------- Design Tokens ---------- */
:root {
  /* Light mode (default) */
  --color-bg: #F7F8FA;
  --color-surface: #FFFFFF;
  --color-surface-raised: #FFFFFF;
  --color-text: #1B1F27;
  --color-text-muted: #5B6472;
  --color-border: #E3E6EA;
  --color-accent: #2F6F5E;
  --color-accent-strong: #24594B;
  --color-accent-soft: #E4F1EC;
  --color-accent-2: #C97A3D;
  --color-accent-2-soft: #F7EBDF;
  --color-danger: #B3432F;
  --color-focus: #2F6F5E;

  --font-display: 'Space Grotesk', 'Arial Narrow', sans-serif;
  --font-body: 'Lora', Georgia, 'Times New Roman', serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(20, 24, 30, 0.06), 0 1px 1px rgba(20, 24, 30, 0.04);
  --shadow-md: 0 8px 24px rgba(20, 24, 30, 0.08);
  --shadow-lg: 0 16px 40px rgba(20, 24, 30, 0.12);

  --container-width: 1180px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --space-9: 6.5rem;

  --transition-fast: 150ms ease;
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme='dark'] {
  --color-bg: #12161C;
  --color-surface: #1A2028;
  --color-surface-raised: #202834;
  --color-text: #E7EAEE;
  --color-text-muted: #8B94A3;
  --color-border: #2A313D;
  --color-accent: #4FA98C;
  --color-accent-strong: #6BC1A4;
  --color-accent-soft: #1C2C28;
  --color-accent-2: #D98F52;
  --color-accent-2-soft: #2B2419;
  --color-danger: #E0725A;
  --color-focus: #6BC1A4;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Base ---------- */
body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  transition: background-color var(--transition-base), color var(--transition-base);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  letter-spacing: -0.01em;
  font-weight: 600;
}

h1 { font-size: clamp(2.25rem, 4.5vw, 3.75rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
  color: var(--color-text-muted);
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-accent);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-3);
}

.eyebrow::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  display: inline-block;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Focus states (accessibility) ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
  min-height: 44px;
  min-width: 44px;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-accent-strong);
  box-shadow: var(--shadow-md);
}

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

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

.btn-block {
  width: 100%;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
}

.logo-mark {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-size: 1.35rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-7);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 500;
}

.nav-links a {
  position: relative;
  color: var(--color-text-muted);
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-fast);
}

.nav-links a:hover,
.nav-links a[aria-current='page'] {
  color: var(--color-text);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--color-accent);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  stroke: var(--color-text);
}

.theme-toggle .icon-sun { display: none; }
[data-theme='dark'] .theme-toggle .icon-moon { display: none; }
[data-theme='dark'] .theme-toggle .icon-sun { display: block; }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  position: relative;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle span::before { top: -6px; position: absolute; }
.nav-toggle span::after { top: 6px; position: absolute; }

.nav-toggle[aria-expanded='true'] span { background: transparent; }
.nav-toggle[aria-expanded='true'] span::before { transform: rotate(45deg); top: 0; }
.nav-toggle[aria-expanded='true'] span::after { transform: rotate(-45deg); top: 0; }

/* ---------- Hero ---------- */
.hero {
  padding-block: var(--space-9) var(--space-8);
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-8);
  align-items: center;
}

.hero-heading {
  margin-bottom: var(--space-5);
}

.cursor {
  display: inline-block;
  width: 3px;
  height: 0.8em;
  background: var(--color-accent);
  margin-left: 4px;
  animation: blink 1.1s step-end infinite;
  vertical-align: text-bottom;
}

@keyframes blink {
  0%, 45% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

.hero-lede {
  font-size: 1.125rem;
  max-width: 46ch;
  margin-bottom: var(--space-6);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}

.hero-stats {
  display: flex;
  gap: var(--space-7);
  font-family: var(--font-mono);
}

.hero-stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-text);
}

.hero-stat span {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* Hero visual: mock editor panel */
.hero-visual {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.hero-visual-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.hero-visual-bar .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
}

.hero-visual-bar .dot:nth-child(1) { background: #E0725A; }
.hero-visual-bar .dot:nth-child(2) { background: #D9A93F; }
.hero-visual-bar .dot:nth-child(3) { background: #6BC17A; }

.hero-visual-filename {
  margin-left: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.hero-visual-body {
  padding: var(--space-5);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.9;
}

.hero-visual-body .ln {
  color: var(--color-text-muted);
  opacity: 0.5;
  display: inline-block;
  width: 1.5em;
  user-select: none;
}

.hero-visual-body .kw { color: var(--color-accent-2); }
.hero-visual-body .str { color: var(--color-accent); }
.hero-visual-body .com { color: var(--color-text-muted); }

/* ---------- Section headers ---------- */
.section {
  padding-block: var(--space-8);
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.section-header h2 {
  margin: 0;
}

.section-link {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-accent);
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}

.section-link:hover {
  border-color: var(--color-accent);
}

/* ---------- Article Cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--color-accent) 40%, var(--color-border));
}

.article-card-media {
  aspect-ratio: 16 / 10;
  background: var(--color-accent-soft);
}

.article-card-media svg {
  width: 100%;
  height: 100%;
}

.article-card-body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.category-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
}

.article-card h3 a {
  transition: color var(--transition-fast);
}

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

.article-card p {
  font-size: 0.9375rem;
  flex: 1;
}

.card-read-more {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

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

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

/* ---------- Latest articles list ---------- */
.article-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-border);
}

.article-list-item {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  align-items: center;
  gap: var(--space-5);
  padding-block: var(--space-5);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-fast);
}

.article-list-item:hover {
  background: var(--color-surface);
}

.article-list-index {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.article-list-content h3 {
  font-size: 1.0625rem;
  margin-bottom: var(--space-1);
}

.article-list-content .card-meta {
  margin-top: var(--space-2);
}

/* ---------- CTA ---------- */
.cta-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.cta-panel {
  background: var(--color-text);
  color: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-6);
  align-items: center;
}

[data-theme='dark'] .cta-panel {
  background: var(--color-surface-raised);
}

.cta-panel h2 {
  color: inherit;
}

.cta-panel p {
  color: color-mix(in srgb, var(--color-bg) 65%, transparent);
  max-width: 42ch;
}

[data-theme='dark'] .cta-panel p {
  color: var(--color-text-muted);
}

.cta-form {
  display: flex;
  gap: var(--space-3);
  font-family: var(--font-mono);
}

.cta-form input[type='email'] {
  flex: 1;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--color-bg) 30%, transparent);
  background: color-mix(in srgb, var(--color-bg) 8%, transparent);
  color: var(--color-bg);
  min-height: 44px;
}

[data-theme='dark'] .cta-form input[type='email'] {
  color: var(--color-text);
  border-color: var(--color-border);
}

.cta-form input[type='email']::placeholder {
  color: color-mix(in srgb, var(--color-bg) 55%, transparent);
}

.cta-form .btn-primary {
  background: var(--color-accent);
}

.cta-note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin-top: var(--space-3);
  color: color-mix(in srgb, var(--color-bg) 55%, transparent);
}

[data-theme='dark'] .cta-note {
  color: var(--color-text-muted);
}

/* ---------- Footer ---------- */
.site-footer {
  padding-block: var(--space-8) var(--space-6);
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-7);
}

.footer-brand p {
  margin-top: var(--space-3);
  max-width: 32ch;
  font-size: 0.9375rem;
}

.footer-col h4 {
  font-size: 0.9375rem;
  margin-bottom: var(--space-4);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-col a {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.social-links {
  display: flex;
  gap: var(--space-3);
}

.social-links a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.social-links a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.social-links svg {
  width: 16px;
  height: 16px;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero .container {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .cta-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .main-nav {
    position: fixed;
    inset: 76px 0 0 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-6) var(--space-5);
    gap: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
  }

  .main-nav[data-open='true'] {
    transform: translateX(0);
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-5);
    font-size: 1.125rem;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .hero-stats {
    gap: var(--space-5);
    flex-wrap: wrap;
  }

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

  .article-list-item {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }

  .article-list-index {
    display: none;
  }

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-form {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .hero {
    padding-block: var(--space-7) var(--space-6);
  }

  .section {
    padding-block: var(--space-7);
  }
}

/* ==========================================================================
   Interior pages: breadcrumbs, page hero, prose, forms, article layout
   ========================================================================== */

/* ---------- Breadcrumbs ---------- */
.breadcrumbs {
  padding-block: var(--space-5);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumbs a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.breadcrumbs a:hover {
  color: var(--color-accent);
}

.breadcrumbs li:not(:last-child)::after {
  content: '/';
  margin-left: var(--space-2);
  color: var(--color-border);
}

.breadcrumbs li[aria-current='page'] {
  color: var(--color-text);
}

/* ---------- Generic page hero (About / Contact / Blog / Legal) ---------- */
.page-hero {
  padding-block: var(--space-6) var(--space-7);
}

.page-hero h1 {
  margin-bottom: var(--space-4);
}

.page-hero p.hero-lede {
  margin-bottom: 0;
}

/* ---------- Prose (legal pages, long-form static content) ---------- */
.prose {
  max-width: 72ch;
}

.prose h2 {
  margin-top: var(--space-7);
  margin-bottom: var(--space-4);
}

.prose h3 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.prose p {
  margin-bottom: var(--space-4);
}

.prose ul,
.prose ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-5);
}

.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }

.prose li {
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.prose strong {
  color: var(--color-text);
}

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

.prose .updated-note {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

/* ---------- About page ---------- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.value-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.value-card .eyebrow {
  margin-bottom: var(--space-2);
}

.value-card p {
  font-size: 0.9375rem;
  margin: 0;
}

/* ---------- Forms (Contact page) ---------- */
.form-layout {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: var(--space-8);
  align-items: start;
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: var(--space-2);
}

.form-label .required {
  color: var(--color-danger);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-body);
  min-height: 44px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
  outline: none;
}

.form-textarea {
  min-height: 160px;
  resize: vertical;
}

.form-hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.form-error-message {
  font-size: 0.8125rem;
  color: var(--color-danger);
  margin-top: var(--space-2);
  display: none;
  font-family: var(--font-mono);
}

.form-group.has-error .form-input,
.form-group.has-error .form-textarea {
  border-color: var(--color-danger);
}

.form-group.has-error .form-error-message {
  display: block;
}

.form-status {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  margin-bottom: var(--space-5);
  display: none;
}

.form-status.is-visible {
  display: block;
}

.form-status.success {
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  border: 1px solid var(--color-accent);
}

.form-status.error {
  background: color-mix(in srgb, var(--color-danger) 12%, transparent);
  color: var(--color-danger);
  border: 1px solid var(--color-danger);
}

.contact-info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.contact-info-card h3 {
  margin-bottom: var(--space-3);
}

.contact-info-list {
  margin-top: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-info-item .label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  display: block;
  margin-bottom: var(--space-1);
}

.contact-info-item .value {
  font-size: 0.9375rem;
}

/* ---------- Blog listing ---------- */
.blog-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}

.search-field {
  position: relative;
  flex: 1;
  min-width: 220px;
  max-width: 360px;
}

.search-field input {
  width: 100%;
  padding: 0.7rem 1rem 0.7rem 2.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  min-height: 44px;
}

.search-field svg {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  stroke: var(--color-text-muted);
  pointer-events: none;
}

.filter-pills {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.filter-pill {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
  min-height: 40px;
}

.filter-pill:hover {
  border-color: var(--color-accent);
}

.filter-pill[aria-pressed='true'] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.no-results {
  display: none;
  text-align: center;
  padding: var(--space-8) 0;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
}

.no-results.is-visible {
  display: block;
}

/* ---------- Article page ---------- */
.article-hero {
  padding-block: var(--space-6) var(--space-6);
}

.article-hero .category-tag {
  margin-bottom: var(--space-4);
}

.article-hero h1 {
  margin-bottom: var(--space-5);
  max-width: 22ch;
}

.article-byline {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.author-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8125rem;
}

.article-byline .byline-name {
  color: var(--color-text);
  font-weight: 500;
}

.article-featured-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-7);
}

.article-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7);
}

.article-content h2 {
  margin-top: var(--space-7);
  margin-bottom: var(--space-4);
  scroll-margin-top: 100px;
}

.article-content h3 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.article-content p {
  margin-bottom: var(--space-4);
  font-size: 1.0625rem;
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--space-5);
  padding-left: var(--space-5);
  color: var(--color-text-muted);
}

.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }

.article-content li {
  margin-bottom: var(--space-2);
  font-size: 1.0625rem;
}

.article-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-5);
  font-style: italic;
  color: var(--color-text);
  margin: var(--space-6) 0;
}

.article-content code {
  font-family: var(--font-mono);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.article-content pre {
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-5);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--space-5);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
}

[data-theme='dark'] .article-content pre {
  background: var(--color-surface-raised);
  color: var(--color-text);
}

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

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  padding: var(--space-4) var(--space-5);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--color-accent);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
  margin-left: var(--space-4);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  padding: 0 var(--space-5) var(--space-5);
  font-size: 0.9375rem;
  margin: 0;
}

/* Summary box */
.summary-box {
  background: var(--color-accent-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin: var(--space-6) 0;
}

.summary-box h3 {
  margin-top: 0;
  margin-bottom: var(--space-3);
  color: var(--color-accent-strong);
}

.summary-box ul {
  margin-bottom: 0;
}

/* Tags / internal links row */
.article-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-7);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.share-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* Author box */
.author-box {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-top: var(--space-7);
}

.author-box .author-avatar {
  width: 52px;
  height: 52px;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.author-box h3 {
  margin-bottom: var(--space-1);
}

.author-box p {
  font-size: 0.9375rem;
  margin: 0;
}

/* ---------- 404 ---------- */
.error-page {
  padding-block: var(--space-9);
  text-align: center;
}

.error-code {
  font-family: var(--font-mono);
  font-size: clamp(4rem, 12vw, 8rem);
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-5);
}

.error-page p {
  max-width: 46ch;
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

.error-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- HTML Sitemap ---------- */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-7);
}

.sitemap-col h2 {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.sitemap-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.sitemap-col a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.sitemap-col a:hover {
  color: var(--color-accent);
}

/* ---------- Responsive additions ---------- */
@media (max-width: 960px) {
  .values-grid {
    grid-template-columns: 1fr;
  }

  .form-layout {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  .blog-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .search-field {
    max-width: none;
  }
}