:root {
  /* Brand Color Palette derived from brand/infosmid-org.svg */
  --color-primary: #374a5a;
  --color-primary-dark: #273541;
  --color-primary-light: #4c6478;
  --color-primary-subtle: #edf3f7;
  --color-primary-tint: #f4f7f9;
  
  --color-accent: #2b6c9b;
  --color-accent-hover: #1e5277;
  
  --color-text-main: #1d2630;
  --color-text-muted: #556776;
  --color-text-light: #7b8e9d;
  
  --color-bg-page: #ffffff;
  --color-bg-subtle: #f8fafb;
  --color-bg-card: #ffffff;
  
  --color-border: #e1e8ed;
  --color-border-subtle: #edf2f5;
  --color-border-focus: #374a5a;

  --header-bg: rgba(255, 255, 255, 0.92);
  --btn-primary-bg: #374a5a;
  --btn-primary-text: #ffffff;
  --btn-primary-hover-bg: #273541;

  --shadow-sm: 0 1px 3px rgba(55, 74, 90, 0.08);
  --shadow-md: 0 4px 12px rgba(55, 74, 90, 0.08), 0 1px 3px rgba(55, 74, 90, 0.04);
  --shadow-lg: 0 10px 24px rgba(55, 74, 90, 0.10), 0 2px 6px rgba(55, 74, 90, 0.04);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  --container-max-width: 1080px;
}

:root[data-theme="dark"] {
  --color-primary: #8faec5;
  --color-primary-dark: #7093ad;
  --color-primary-light: #a9c4d8;
  --color-primary-subtle: #1f2a33;
  --color-primary-tint: #182128;
  
  --color-accent: #5b9ed4;
  --color-accent-hover: #7eb6e4;
  
  --color-text-main: #f0f4f7;
  --color-text-muted: #a3b5c3;
  --color-text-light: #778b9b;
  
  --color-bg-page: #12181d;
  --color-bg-subtle: #171f25;
  --color-bg-card: #1c252d;
  
  --color-border: #293844;
  --color-border-subtle: #212d37;
  --color-border-focus: #8faec5;

  --header-bg: rgba(18, 24, 29, 0.92);
  --btn-primary-bg: #8faec5;
  --btn-primary-text: #12181d;
  --btn-primary-hover-bg: #a9c4d8;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 10px 24px rgba(0, 0, 0, 0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-primary: #8faec5;
    --color-primary-dark: #7093ad;
    --color-primary-light: #a9c4d8;
    --color-primary-subtle: #1f2a33;
    --color-primary-tint: #182128;
    
    --color-accent: #5b9ed4;
    --color-accent-hover: #7eb6e4;
    
    --color-text-main: #f0f4f7;
    --color-text-muted: #a3b5c3;
    --color-text-light: #778b9b;
    
    --color-bg-page: #12181d;
    --color-bg-subtle: #171f25;
    --color-bg-card: #1c252d;
    
    --color-border: #293844;
    --color-border-subtle: #212d37;
    --color-border-focus: #8faec5;

    --header-bg: rgba(18, 24, 29, 0.92);
    --btn-primary-bg: #8faec5;
    --btn-primary-text: #12181d;
    --btn-primary-hover-bg: #a9c4d8;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 10px 24px 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;
}


@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .brand-logo-light {
    display: none !important;
  }
  :root:not([data-theme="light"]) .brand-logo-dark {
    display: block;
  }
}

:root[data-theme="dark"] .brand-logo-light {
  display: none !important;
}

:root[data-theme="dark"] .brand-logo-dark {
  display: block;
}

:root[data-theme="light"] .brand-logo-dark {
  display: none !important;
}

:root[data-theme="light"] .brand-logo-light {
  display: block;
}

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

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

.brand-badge {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.nav-link {
  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-md);
  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 0.85rem;
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2.75rem;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
}

.hero-lead {
  font-size: 1.2rem;
  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-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  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-primary);
  border-color: var(--color-border);
}

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

/* Feature/Value Grid */
.features-strip {
  padding: 2.5rem 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-md);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  color: var(--color-text-main);
}

.feature-desc {
  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 {
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text-main);
  line-height: 1.2;
}

.section-subtitle {
  margin-top: 0.5rem;
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 680px;
}

/* Projects Cards */
.projects-grid {
  display: grid;
  /* At most 2 columns; collapses to 1 when a column would be narrower than 320px */
  grid-template-columns: repeat(auto-fit, minmax(max(320px, calc((100% - 1.75rem) / 2)), 1fr));
  gap: 1.75rem;
}

.project-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  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-light);
}

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

.project-title {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  min-width: 0;
}

.project-name {
  font-size: 1.3rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--color-primary);
}

.project-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.project-description {
  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;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

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

.project-link:hover {
  text-decoration: underline;
}

.project-version {
  text-transform: none;
  font-family: var(--font-mono);
}

/* About / Relationship Section */
.about-box {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  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-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

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

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

.about-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

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

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

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

/* Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--color-primary-dark);
  color: #d1dde6;
  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 rgba(255, 255, 255, 0.1);
}

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

.footer-brand .brand-title {
  color: #ffffff;
}

.footer-brand p {
  color: #9cb1c1;
  max-width: 380px;
  line-height: 1.55;
  font-size: 0.9rem;
}

.footer-heading {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #ffffff;
  margin-bottom: 1rem;
}

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

.footer-link {
  color: #9cb1c1;
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-link:hover {
  color: #ffffff;
}

.footer-bottom {
  padding-top: 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  color: #7b94a7;
  font-size: 0.825rem;
}

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

/* 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;
  }
}