:root {
  color-scheme: dark;
  --bg: #0f172a;
  --surface: #111827;
  --surface-contrast: #1f2937;
  --text: #e5e7eb;
  --muted: #cbd5e1;
  --primary: #8b5cf6;
  --primary-strong: #a78bfa;
  --on-primary: #f8fafc;
  --link: #f7c948;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --pill-bg: rgba(247, 201, 72, 0.22);
  --pill-text: #f7c948;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f4f4f4;
  --surface: #ffffff;
  --surface-contrast: #f7f7f7;
  --text: #111827;
  --muted: #4b5563;
  --primary: #6200ea;
  --primary-strong: #5136c6;
  --on-primary: #ffffff;
  --link: #6200ea;
  --border: rgba(0, 0, 0, 0.08);
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
  --pill-bg: #ede7f6;
  --pill-text: #4527a0;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    color-scheme: light;
    --bg: #f4f4f4;
    --surface: #ffffff;
    --surface-contrast: #f7f7f7;
    --text: #111827;
    --muted: #4b5563;
    --primary: #6200ea;
    --primary-strong: #5136c6;
    --on-primary: #ffffff;
    --link: #6200ea;
    --border: rgba(0, 0, 0, 0.08);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
    --pill-bg: #ede7f6;
    --pill-text: #4527a0;
  }
}

body {
  font-family: "Roboto", sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--text);
  transition: background-color 0.25s ease, color 0.25s ease;
}

header {
  background-color: var(--primary);
  color: var(--on-primary);
  padding: 20px 0;
}

.container {
  max-width: 1200px;
  margin: auto;
  padding: 20px;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: auto;
  flex-wrap: wrap;
  gap: 16px;
}

section {
  margin: 20px 0;
}

.card {
  padding: 20px;
  border-radius: 8px;
  box-shadow: var(--shadow);
  background: var(--surface);
  border: 1px solid var(--border);
}

h1 {
  margin: 0;
}

h2 {
  color: var(--primary);
  margin-top: 0;
}

h2.header {
  color: var(--on-primary);
}

h3 {
  margin-top: 0;
}

footer {
  text-align: center;
  margin: 20px 0;
  padding: 10px;
  color: var(--muted);
}

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

a:hover {
  text-decoration: underline;
}

.contact-icons {
  display: flex;
  align-items: center;
  gap: 12px;
}

.icon {
  font-size: 1.5em;
  color: var(--on-primary);
  transition: color 0.2s ease;
}

.icon:hover {
  color: var(--primary-strong);
}

.tagline {
  margin-top: 5px;
  font-size: 0.95rem;
  opacity: 0.9;
}

.subdued {
  font-size: 0.9rem;
  color: var(--muted);
}

/* Blog-specific helpers */
.blog-list {
  list-style: none;
  padding-left: 0;
}

.blog-list li {
  margin-bottom: 16px;
}

.blog-meta {
  font-size: 0.85rem;
  color: var(--muted);
}

.blog-post {
  max-width: 800px;
  margin: 0 auto;
}

.blog-post h1 {
  margin-bottom: 10px;
  color: var(--primary);
}

.blog-post pre,
.blog-post code {
  background: var(--surface-contrast);
  color: var(--primary-strong);
  padding: 2px 4px;
  border-radius: 4px;
}

.blog-post pre {
  padding: 12px;
  overflow-x: auto;
  display: block;
}

/* Homepage helpers */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.skills-grid.certifications {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

@media (max-width: 1024px) {
  .skills-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }
}

.full-width {
  margin-bottom: 20px;
}

ul {
  padding-left: 20px;
  margin: 10px 0 0 0;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.pill {
  background: var(--pill-bg);
  color: var(--pill-text);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
}

/* Theme toggle */
.theme-toggle {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: var(--on-primary);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.6);
}

:root[data-theme="light"] .theme-toggle {
  background: #ffffff;
  color: #111827;
  border-color: rgba(0, 0, 0, 0.2);
}

:root[data-theme="light"] .theme-toggle:hover {
  background: #f7f7f7;
  border-color: rgba(0, 0, 0, 0.35);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) .theme-toggle {
    background: #ffffff;
    color: #111827;
    border-color: rgba(0, 0, 0, 0.2);
  }

  :root:not([data-theme]) .theme-toggle:hover {
    background: #f7f7f7;
    border-color: rgba(0, 0, 0, 0.35);
  }
}