@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Lora:ital,wght@0,400;0,500;0,600;1,400&family=Poppins:wght@500;600;700;800&family=Roboto:ital,wght@0,400;0,500;0,700;1,400&display=swap');

:root {
  /* Brand Typography Tiers - Poppins (Display), Lora (Editorial), Roboto (UI/Body), JetBrains Mono (Code) */
  --font-display: "Poppins", Arial, sans-serif;
  --font-editorial: "Lora", Georgia, serif;
  --font-sans: "Roboto", "Roboto Flex", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Core Brand Tokens - Light Mode (Enterprise Precision) */
  --color-bg-page: #FAF9F5;
  --color-bg-subtle: #F1F5F9;
  --color-bg-card: #FFFFFF;

  --color-text-main: #141413;
  --color-text-muted: #475569;
  --color-text-light: #64748B;

  --color-primary: #1E40AF;
  --color-primary-dark: #1e3a8a;
  --color-primary-light: #3b82f6;
  --color-primary-subtle: #EEF2FF;
  --color-primary-tint: #F8FAFC;

  /* Industrial Forge Brand Accent (Blue-Grey Metal & Steel) */
  --color-forge: #34526B;
  --color-forge-warm: #446582;
  --color-forge-subtle: #F1F5F8;
  --color-forge-container: #DCE4EC;

  --color-accent: #0284C7;
  --color-accent-hover: #0369a1;

  --color-neutral-supporting: #0F766E;
  --color-sage: #788C5D;

  --color-border: #E2E8F0;
  --color-border-subtle: #E8E6DC;
  --color-border-focus: #1E40AF;

  --header-bg: rgba(250, 249, 245, 0.92);
  --footer-bg: #CBD5E1;
  --footer-text: #475569;
  --footer-heading: #141413;
  --footer-title: #141413;
  --footer-link: #475569;
  --footer-link-hover: #1E40AF;
  --footer-border: #E2E8F0;
  --footer-border-inner: #E2E8F0;
  --footer-bottom-text: #64748B;

  --btn-primary-bg: #1E40AF;
  --btn-primary-text: #FFFFFF;
  --btn-primary-hover-bg: #1e3a8a;

  /* Architectural Semantic Tiers */
  --tier-system-accent: #475569;
  --tier-system-container: #F1F5F9;
  --tier-ontology-accent: #6D28D9;
  --tier-ontology-container: #F5F3FF;
  --tier-taxonomy-accent: #0284C7;
  --tier-taxonomy-container: #ECFEFF;
  --tier-workflow-accent: #1E40AF;
  --tier-workflow-container: #EEF2FF;

  /* Runtime Lifecycle Execution States */
  --color-status-queued: #64748B;
  --color-status-queued-bg: #F1F5F9;
  --color-status-running: #0284C7;
  --color-status-running-bg: #E0F2FE;
  --color-status-success: #16A34A;
  --color-status-success-bg: #DCFCE7;
  --color-status-error: #DC2626;
  --color-status-error-bg: #FEE2E2;

  /* Shadows - Crisp, low-blur elevation shadows */
  --shadow-sm: 0 1px 2px rgba(20, 20, 19, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(20, 20, 19, 0.07), 0 2px 4px -2px rgba(20, 20, 19, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(20, 20, 19, 0.08), 0 4px 6px -4px rgba(20, 20, 19, 0.04);

  /* Corner Radii - Buttons/Chips: 4px, Cards/Modals: 8px, Indicators: Full */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 8px;
  --radius-full: 9999px;

  --container-max-width: 1080px;
}

:root[data-theme="dark"] {
  /* Core Brand Tokens - Dark Mode (Industrial Forge Adaptation) */
  --color-bg-page: #141413;
  --color-bg-subtle: #2A2F3D;
  --color-bg-card: #1A202C;

  --color-text-main: #FAF9F5;
  --color-text-muted: #B0AEA5;
  --color-text-light: #8E8C85;

  --color-primary: #7B9BB7;
  --color-primary-dark: #4A6D8C;
  --color-primary-light: #9EB7CD;
  --color-primary-subtle: #1E2B37;
  --color-primary-tint: #16212B;

  /* Industrial Forge Brand Accent (Blue-Grey Metal & Steel) */
  --color-forge: #7B9BB7;
  --color-forge-warm: #9EB7CD;
  --color-forge-subtle: #1E2B37;
  --color-forge-container: #253545;

  --color-accent: #00E5FF;
  --color-accent-hover: #38BDF8;

  --color-neutral-supporting: #4A5568;
  --color-sage: #788C5D;

  --color-border: #334155;
  --color-border-subtle: #242E3D;
  --color-border-focus: #7B9BB7;

  --header-bg: rgba(20, 20, 19, 0.92);
  --footer-bg: #0D0D0C;
  --footer-text: #B0AEA5;
  --footer-heading: #FAF9F5;
  --footer-title: #FAF9F5;
  --footer-link: #B0AEA5;
  --footer-link-hover: #FAF9F5;
  --footer-border: #334155;
  --footer-border-inner: rgba(255, 255, 255, 0.08);
  --footer-bottom-text: #8E8C85;

  --btn-primary-bg: #4A6D8C;
  --btn-primary-text: #FAF9F5;
  --btn-primary-hover-bg: #5A7E9E;

  /* Architectural Semantic Tiers */
  --tier-system-accent: #94A3B8;
  --tier-system-container: #1E293B;
  --tier-ontology-accent: #8B5CF6;
  --tier-ontology-container: #2E1065;
  --tier-taxonomy-accent: #00E5FF;
  --tier-taxonomy-container: #083344;
  --tier-workflow-accent: #7B9BB7;
  --tier-workflow-container: #1E2B37;

  /* Runtime Lifecycle Execution States */
  --color-status-queued: #94A3B8;
  --color-status-queued-bg: #334155;
  --color-status-running: #38BDF8;
  --color-status-running-bg: #0C4A6E;
  --color-status-success: #10B981;
  --color-status-success-bg: #064E3B;
  --color-status-error: #EF4444;
  --color-status-error-bg: #450A0A;

  /* Shadows - Ambient low-intensity shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.45), 0 2px 4px -2px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.55), 0 4px 6px -4px rgba(0, 0, 0, 0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg-page: #141413;
    --color-bg-subtle: #2A2F3D;
    --color-bg-card: #1A202C;

    --color-text-main: #FAF9F5;
    --color-text-muted: #B0AEA5;
    --color-text-light: #8E8C85;

    --color-primary: #7B9BB7;
    --color-primary-dark: #4A6D8C;
    --color-primary-light: #9EB7CD;
    --color-primary-subtle: #1E2B37;
    --color-primary-tint: #16212B;

    --color-forge: #7B9BB7;
    --color-forge-warm: #9EB7CD;
    --color-forge-subtle: #1E2B37;
    --color-forge-container: #253545;

    --color-accent: #00E5FF;
    --color-accent-hover: #38BDF8;

    --color-neutral-supporting: #4A5568;
    --color-sage: #788C5D;

    --color-border: #334155;
    --color-border-subtle: #242E3D;
    --color-border-focus: #7B9BB7;

    --header-bg: rgba(20, 20, 19, 0.92);
    --footer-bg: #0D0D0C;
    --footer-text: #B0AEA5;
    --footer-heading: #FAF9F5;
    --footer-title: #FAF9F5;
    --footer-link: #B0AEA5;
    --footer-link-hover: #FAF9F5;
    --footer-border: #334155;
    --footer-border-inner: rgba(255, 255, 255, 0.08);
    --footer-bottom-text: #8E8C85;

    --btn-primary-bg: #4A6D8C;
    --btn-primary-text: #FAF9F5;
    --btn-primary-hover-bg: #5A7E9E;

    --tier-system-accent: #94A3B8;
    --tier-system-container: #1E293B;
    --tier-ontology-accent: #8B5CF6;
    --tier-ontology-container: #2E1065;
    --tier-taxonomy-accent: #00E5FF;
    --tier-taxonomy-container: #083344;
    --tier-workflow-accent: #7B9BB7;
    --tier-workflow-container: #1E2B37;

    --color-status-queued: #94A3B8;
    --color-status-queued-bg: #334155;
    --color-status-running: #38BDF8;
    --color-status-running-bg: #0C4A6E;
    --color-status-success: #10B981;
    --color-status-success-bg: #064E3B;
    --color-status-error: #EF4444;
    --color-status-error-bg: #450A0A;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.45), 0 2px 4px -2px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.55), 0 4px 6px -4px rgba(0, 0, 0, 0.45);
  }
}

/* Box sizing and baseline reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  color: var(--color-text-main);
  background-color: var(--color-bg-page);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Accessibility: skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-primary);
  color: #ffffff;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 1000;
  text-decoration: none;
  font-weight: 600;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

/* Layout container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Header & Navigation */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background-color: var(--header-bg);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-text-main);
}

.brand-logo {
  height: 2.25rem;
  width: 2.25rem;
  display: block;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-main);
  line-height: 1.1;
}

.brand-badge {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-forge);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  font-family: var(--font-sans);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link.nav-external {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-card);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.theme-toggle-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary-light);
  background-color: var(--color-primary-subtle);
}

.theme-toggle-btn:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* Hero Section */
.hero {
  padding: 4.5rem 0 3.5rem;
  background-color: var(--color-bg-subtle);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.hero-content {
  max-width: 820px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: 2.75rem;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--color-text-main);
  margin-bottom: 1.25rem;
}

.hero-lead {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 2rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease-in-out;
  border: 1px solid transparent;
}

.btn:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--btn-primary-bg);
  color: var(--btn-primary-text);
}

.btn-primary:hover {
  background-color: var(--btn-primary-hover-bg);
}

.btn-secondary {
  background-color: var(--color-bg-card);
  color: var(--color-text-main);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  border-color: var(--color-primary-light);
}

/* Feature/Value Grid */
.features-strip {
  padding: 3rem 0;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg-page);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.feature-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.feature-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--color-text-main);
}

.feature-desc {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Section Common */
.section {
  padding: 4.5rem 0;
}

.section-alt {
  background-color: var(--color-bg-subtle);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  margin-bottom: 2.5rem;
}

.section-tag {
  font-family: var(--font-sans);
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-forge-warm);
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-main);
  line-height: 1.25;
}

.section-subtitle {
  font-family: var(--font-sans);
  margin-top: 0.5rem;
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 680px;
}

/* Projects Cards */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.75rem;
}

.project-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  box-shadow: var(--shadow-sm);
}

.project-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.85rem;
}

.project-name {
  font-size: 1.25rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--color-text-main);
}

.project-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  font-family: var(--font-mono);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  background-color: var(--tier-taxonomy-container);
  color: var(--tier-taxonomy-accent);
  border: 1px solid var(--color-border);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.project-description {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.tech-tag {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 0.2rem 0.5rem;
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
}

.project-footer {
  padding-top: 1rem;
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
}

.project-link:hover {
  color: var(--color-primary-light);
  text-decoration: underline;
}

/* About / Relationship Section */
.about-box {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  box-shadow: var(--shadow-sm);
}

.about-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.about-text p {
  margin-bottom: 1rem;
  font-family: var(--font-editorial);
  font-size: 1.05rem;
  color: var(--color-text-main);
  line-height: 1.7;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-card {
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.about-card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 0.75rem;
}

.about-card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.about-card-list li {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.about-card-list svg {
  color: var(--color-status-success);
  flex-shrink: 0;
}

/* Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--footer-bg);
  color: var(--footer-text);
  border-top: 1px solid var(--footer-border);
  padding: 3.5rem 0 2rem;
  font-size: 0.9rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--footer-border-inner);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-brand .brand-title {
  font-family: var(--font-display);
  color: var(--footer-title);
}

.footer-brand p {
  font-family: var(--font-sans);
  color: var(--footer-text);
  max-width: 380px;
  line-height: 1.55;
  font-size: 0.9rem;
}

.footer-heading {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--footer-heading);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-link {
  font-family: var(--font-sans);
  color: var(--footer-link);
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-link:hover {
  color: var(--footer-link-hover);
}

.footer-bottom {
  padding-top: 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--footer-bottom-text);
  font-size: 0.825rem;
}

/* Icons */
.icon {
  display: inline-block;
  vertical-align: middle;
  fill: currentColor;
}

/* Contact Grid & Cards */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.contact-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.contact-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.contact-card-icon {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.contact-card-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 0.5rem;
}

.contact-card-text {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: 1rem;
}

.contact-card-link {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: auto;
}

.contact-card-link:hover {
  color: var(--color-primary-light);
  text-decoration: underline;
}

/* Expertise Grid & Domain Styling */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.75rem;
}

.expertise-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.expertise-card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.expertise-card-title svg {
  color: var(--color-primary);
}

.expertise-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.expertise-list li {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  line-height: 1.5;
}

.expertise-list li svg {
  color: var(--color-status-success);
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.pill-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .header-inner {
    height: auto;
    padding-top: 1rem;
    padding-bottom: 1rem;
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .site-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }

  .hero {
    padding: 3rem 0 2.5rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-lead {
    font-size: 1.05rem;
  }

  .section {
    padding: 3rem 0;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}