@import url('fonts.css');
@import url('chroma-light.css');
@import url('chroma-dark.css');

/* ==========================================================================
   CSS Design System — stefan-strich.de
   Monochrome + blue palette, dark/light mode, Geist typography
   Design decisions: D-01 through D-22
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties — Light mode defaults
   -------------------------------------------------------------------------- */

:root {
  /* Monochrome palette (D-03) */
  --color-bg: oklch(0.985 0 0);
  --color-bg-subtle: oklch(0.97 0 0);
  --color-surface: oklch(1 0 0);
  --color-text: oklch(0.145 0 0);
  --color-text-muted: oklch(0.4 0 0);
  --color-text-subtle: oklch(0.556 0 0);
  --color-border: oklch(0.9 0 0);
  --color-border-subtle: oklch(0.93 0 0);

  /* Blue accent (D-03 — single accent color) */
  --color-accent: oklch(0.55 0.2 250);
  --color-accent-hover: oklch(0.48 0.22 250);
  --color-accent-text: oklch(0.985 0 0);

  /* Glass card tokens (D-04) */
  --glass-bg: oklch(1 0 0 / 0.7);
  --glass-border: oklch(1 0 0 / 0.3);
  --glass-blur: 16px;

  /* Overlay for photo backgrounds (D-01) */
  --overlay-bg: oklch(0 0 0 / 0.5);

  /* Typography (D-06, D-07, D-08) */
  --font-family: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 1rem;       /* 16px per D-08 */
  --line-height-base: 1.5;      /* per D-08 */
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;
  --heading-weight: 300;            /* D-07: light/thin headings */
  --heading-letter-spacing: 0.025em; /* D-07: generous letter-spacing */

  /* Layout (D-18, D-19) */
  --container-max: 1200px;          /* D-18 */
  --reading-max: 65ch;              /* D-19 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Progress bar (D-22) */
  --progress-height: 2px;
  --progress-color: var(--color-accent);

  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

  /* Transitions (D-13) */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;
}

/* --------------------------------------------------------------------------
   Dark mode overrides
   D-16: dark is default for new visitors
   D-17: applied via SSR cookie-read — no flash
   -------------------------------------------------------------------------- */

.dark {
  --color-bg: oklch(0.12 0 0);
  --color-bg-subtle: oklch(0.16 0 0);
  --color-surface: oklch(0.18 0 0);
  --color-text: oklch(0.93 0 0);
  --color-text-muted: oklch(0.7 0 0);
  --color-text-subtle: oklch(0.58 0 0); /* raised from 0.55 for WCAG AA 4.5:1 on dark bg (A11Y-01) */
  --color-border: oklch(0.25 0 0);
  --color-border-subtle: oklch(0.22 0 0);

  --color-accent: oklch(0.62 0.2 250);
  --color-accent-hover: oklch(0.68 0.18 250);

  --glass-bg: oklch(0.15 0 0 / 0.7);
  --glass-border: oklch(1 0 0 / 0.1);

  --overlay-bg: oklch(0 0 0 / 0.7);
}

/* --------------------------------------------------------------------------
   Base reset and global styles
   -------------------------------------------------------------------------- */

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

html {
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  background-image: url('/static/images/portrait-moonlight.jpg');
  background-image: image-set(
    url('/static/images/portrait-moonlight.webp') type("image/webp"),
    url('/static/images/portrait-moonlight.jpg') type("image/jpeg")
  );
  background-size: cover;
  background-position: center center;
  background-attachment: fixed;
  color: var(--color-text);
  min-height: 100dvh;
  /* Sticky footer: flex column so main#content can flex-grow to fill viewport (Phase 05) */
  display: flex;
  flex-direction: column;
}

/* --------------------------------------------------------------------------
   Accessibility — skip-to-content link (A11Y-03, Phase 05)
   Visually hidden until focused; slides into view for keyboard users
   -------------------------------------------------------------------------- */

.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-accent);
  color: #fff;
  z-index: 9999;
  border-radius: var(--radius-sm);
  transition: top 0.15s ease;
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
}

/* --------------------------------------------------------------------------
   Accessibility — global focus indicator (A11Y-04, Phase 05)
   Uses accent color for all interactive elements
   -------------------------------------------------------------------------- */

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

:focus:not(:focus-visible) {
  outline: none;
}

/* --------------------------------------------------------------------------
   Typography hierarchy
   D-07: light + spacious headings (weight 300, generous letter-spacing)
   -------------------------------------------------------------------------- */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--heading-weight);
  letter-spacing: var(--heading-letter-spacing);
  line-height: 1.2;
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* --------------------------------------------------------------------------
   Layout utilities (D-18, D-19)
   -------------------------------------------------------------------------- */

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

.reading-width {
  max-width: var(--reading-max);
}

/* --------------------------------------------------------------------------
   Glass card utility (D-04)
   Semi-transparent with backdrop blur, layered over photo backgrounds
   -------------------------------------------------------------------------- */

.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}

/* --------------------------------------------------------------------------
   Photo overlay utility (D-01)
   Full-bleed background photos with dark overlay
   -------------------------------------------------------------------------- */

.photo-overlay {
  position: relative;
}

.photo-overlay::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--overlay-bg);
  z-index: 1;
}

.photo-overlay > * {
  position: relative;
  z-index: 2;
}

/* --------------------------------------------------------------------------
   Progress bar styles (D-22)
   Thin top-of-page loading indicator during HTMX content swaps
   -------------------------------------------------------------------------- */

#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: var(--progress-height);
  background: var(--progress-color);
  width: 0%;
  transition: width var(--transition-slow);
  z-index: 9999;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   HTMX content transition (D-13: ~200ms fade)
   Sticky footer: flex-grow so main fills remaining viewport height (A11Y-05, Phase 05)
   -------------------------------------------------------------------------- */

.htmx-swapping > #content {
  opacity: 0;
  transition: opacity var(--transition-normal);
}

#content {
  transition: opacity var(--transition-normal);
  flex: 1;
}

/* --------------------------------------------------------------------------
   Responsive breakpoints (D-06: mobile-first from 320px)
   -------------------------------------------------------------------------- */

/* Mobile-first: base styles are for 320px+ */

/* Tablet */
@media (min-width: 768px) {
  :root {
    --font-size-5xl: 4rem;
    --font-size-4xl: 3rem;
  }

  .container {
    padding-inline: var(--spacing-xl);
  }
}

/* Desktop */
@media (min-width: 1024px) {
  :root {
    --font-size-5xl: 4.5rem;
  }

  .container {
    padding-inline: var(--spacing-2xl);
  }
}

/* --------------------------------------------------------------------------
   Footer styles (D-21: subtle separator)
   -------------------------------------------------------------------------- */

.footer-separator {
  border-top: 1px solid var(--color-border-subtle);
}

.footer-text {
  color: var(--color-text-subtle);
  font-size: var(--font-size-sm);
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.social-icon {
  width: 20px;
  height: 20px;
  transition: color var(--transition-normal);
}

.footer-text:hover .social-icon {
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Header (D-09: minimal header — logo/name + dark mode toggle)
   -------------------------------------------------------------------------- */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border-subtle);
  transition: transform var(--transition-normal);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 3.5rem;
}

.header-logo {
  font-size: var(--font-size-lg);
  font-weight: 400;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.05em;
}

.header-logo:hover {
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Theme toggle (D-15)
   -------------------------------------------------------------------------- */

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
}

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

/* Show sun in dark mode, moon in light mode */
.dark .theme-icon--sun { display: block; }
.dark .theme-icon--moon { display: none; }
.theme-icon--sun { display: none; }
.theme-icon--moon { display: block; }

/* --------------------------------------------------------------------------
   Footer inner layout (D-12, D-20, D-21)
   -------------------------------------------------------------------------- */

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-section {
  display: flex;
  gap: var(--spacing-md);
}

/* --------------------------------------------------------------------------
   Card grid (D-11: landing page cards as primary navigation)
   -------------------------------------------------------------------------- */

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

@media (min-width: 768px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card-link {
  display: block;
  padding: var(--spacing-xl);
  text-decoration: none;
  color: var(--color-text);
  transition: transform var(--transition-fast);
}

.card-link:hover {
  transform: scale(1.02);
  color: var(--color-text);
}

.card-link h2 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.card-link p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* --------------------------------------------------------------------------
   Landing page — full-screen hero matching original Next.js frontend design
   Portrait background, dark overlay, glass cards centered, footer at bottom
   -------------------------------------------------------------------------- */

.landing {
  min-height: 100vh;
}

.landing-hero {
  min-height: 100vh;
  position: relative;
  display: flex;
  flex-direction: column;
  background-size: cover;
  background-position: center center;
}

.hero-bg {
  background-image: url('/photos/portrait.jpg');
}

/* 40% dark overlay matching original */
.landing-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: oklch(0 0 0 / 0.4);
  z-index: 1;
}

.landing-hero > * {
  position: relative;
  z-index: 2;
}

/* Header — site name, extralight, top-left */
.landing-header {
  padding: 1.5rem 2rem;
}

.landing-logo {
  color: oklch(1 0 0 / 0.6);
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  font-weight: 200;
  letter-spacing: 0.05em;
  text-shadow: 1px 1px 2px oklch(0 0 0 / 0.8);
  transition: color 300ms;
  margin: 0; /* reset h1 default margin when element is h1 (SEO-05) */
  line-height: 1; /* reset h1 line-height */
}

.landing-logo:hover {
  color: oklch(1 0 0 / 0.8);
}

/* Cards — centered on the hero */
.landing-cards {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.landing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: 64rem;
  width: 100%;
}

@media (min-width: 768px) {
  .landing-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
  .landing-header {
    padding: 2rem;
  }
}

/* Glass card — matches original: bg-white/10, backdrop-blur, border-white/20 */
.landing-card {
  background: oklch(1 0 0 / 0.1);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid oklch(1 0 0 / 0.2);
  border-radius: 0.5rem;
  padding: 2rem 2rem 2rem;
  text-align: center;
  text-decoration: none;
  color: white;
  transition: all 300ms ease;
  display: flex;
  flex-direction: column;
  align-items: center;
}

@media (min-width: 768px) {
  .landing-card {
    padding: 3rem 2rem;
  }
}

.landing-card:hover {
  background: oklch(1 0 0 / 0.2);
  border-color: oklch(1 0 0 / 0.4);
  transform: scale(1.05);
}

/* Circular icon container */
.landing-card-icon {
  width: 4rem;
  height: 4rem;
  background: oklch(1 0 0 / 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: white;
}

.landing-card-title {
  font-size: clamp(1.5rem, 2.5vw, 1.875rem);
  font-weight: 300;
  margin-bottom: 1rem;
}

.landing-card-desc {
  color: oklch(1 0 0 / 0.8);
  font-size: 0.875rem;
}

@media (min-width: 768px) {
  .landing-card-desc {
    font-size: 1rem;
  }
}

.landing-card-cta {
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: oklch(1 0 0 / 0.6);
  transition: color 300ms;
}

.landing-card:hover .landing-card-cta {
  color: oklch(1 0 0 / 0.8);
}

/* Landing footer — inside the hero, at the bottom */
.landing-footer {
  padding: 1.5rem 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.landing-footer-social {
  display: flex;
  gap: 1.5rem;
}

.landing-footer-social a {
  color: oklch(1 0 0 / 0.6);
  transition: color 300ms;
}

.landing-footer-social a:hover {
  color: white;
}

.landing-footer-social .social-icon {
  width: 20px;
  height: 20px;
}

.landing-footer-legal {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: oklch(1 0 0 / 0.5);
}

.landing-footer-legal a {
  color: oklch(1 0 0 / 0.5);
  text-decoration: none;
  transition: color 300ms;
}

.landing-footer-legal a:hover {
  color: oklch(1 0 0 / 0.8);
}

/* --------------------------------------------------------------------------
   Hero section — reused for content pages (CV, Projects, etc.)
   -------------------------------------------------------------------------- */

.hero {
  min-height: 40vh;
  background-size: cover;
  background-position: top center;
  display: flex;
  align-items: flex-end;
  padding-bottom: var(--spacing-3xl);
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: oklch(0 0 0 / 0.4);
}

.hero > * {
  position: relative;
}

.hero-content {
  max-width: var(--container-max);
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 200;
  margin-bottom: var(--spacing-sm);
  color: white;
}

.hero-subtitle {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 300;
  opacity: 0.8;
  margin-bottom: var(--spacing-md);
  color: white;
}

.hero-summary {
  max-width: 65ch;
  line-height: 1.6;
  opacity: 0.9;
  color: white;
}

/* Section spacing for content sections */
.section-spacing {
  padding-top: var(--spacing-3xl);
  padding-bottom: var(--spacing-3xl);
}

/* --------------------------------------------------------------------------
   Back link — breadcrumb-style navigation
   -------------------------------------------------------------------------- */

.back-link {
  display: inline-block;
  margin-bottom: var(--spacing-lg);
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 300;
  transition: opacity var(--transition-fast);
}

.back-link:hover {
  opacity: 0.7;
}

/* --------------------------------------------------------------------------
   CV Timeline (BIZ-02) — left-aligned with year markers
   -------------------------------------------------------------------------- */

.cv-timeline {
  position: relative;
  padding-left: var(--spacing-xl);
  border-left: 2px solid var(--color-border);
  margin-bottom: var(--spacing-3xl);
}

.cv-entry {
  position: relative;
  margin-bottom: var(--spacing-xl);
  padding-left: var(--spacing-md);
}

.cv-entry::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--spacing-xl) - 5px);
  top: 0.5em;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
}

.cv-year {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--spacing-xs);
  letter-spacing: 0.05em;
}

.cv-role {
  font-size: var(--font-size-xl);
  font-weight: 400;
  margin-bottom: var(--spacing-xs);
}

.cv-company {
  font-weight: 300;
  opacity: 0.8;
  margin-bottom: var(--spacing-sm);
}

.cv-location {
  opacity: 0.6;
}

.cv-summary {
  line-height: 1.6;
  max-width: 65ch;
}

.cv-tags,
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

.tag {
  display: inline-block;
  padding: 0.15em 0.6em;
  font-size: 0.8rem;
  border-radius: 4px;
  background: rgba(128, 128, 128, 0.1);
  border: 1px solid rgba(128, 128, 128, 0.15);
}

/* --------------------------------------------------------------------------
   Skills grid (BIZ-03)
   -------------------------------------------------------------------------- */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.skill-group h3 {
  font-size: var(--font-size-base);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.7;
}

/* --------------------------------------------------------------------------
   Print styles (BIZ-08)
   -------------------------------------------------------------------------- */

@media print {
  .header,
  .footer-separator,
  .footer,
  .theme-toggle,
  #progress-bar,
  .back-link { display: none !important; }

  .cv-entry { page-break-inside: avoid; break-inside: avoid; }

  .glass {
    background: white !important;
    backdrop-filter: none !important;
    border: 1px solid #ddd !important;
  }

  body {
    background: white !important;
    color: black !important;
    font-size: 11pt;
  }

  .cv-timeline { border-left-color: #ccc; }
  .cv-entry::before { background: #666; }
  .cv-year { color: #333; }
  .tag { background: #f0f0f0; border-color: #ccc; color: #333; }

  a[href]::after { content: " (" attr(href) ")"; font-size: 0.75em; color: #666; }

  @page { margin: 1.5cm; }
}

/* --------------------------------------------------------------------------
   Project list — card grid (BIZ-04)
   -------------------------------------------------------------------------- */

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.project-card {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.project-card h2 {
  font-size: 1.25rem;
  font-weight: 400;
}

.project-links {
  margin-top: auto;
  padding-top: var(--spacing-sm);
  display: flex;
  gap: var(--spacing-md);
}

.project-links a {
  color: var(--color-accent);
  text-decoration: none;
  font-size: 0.9rem;
  transition: opacity var(--transition-normal);
}

.project-links a:hover {
  opacity: 0.7;
}

/* --------------------------------------------------------------------------
   Project detail — case study page (BIZ-05)
   -------------------------------------------------------------------------- */

.case-study-description {
  font-size: 1.1rem;
  opacity: 0.8;
  margin-bottom: var(--spacing-lg);
  max-width: 65ch;
}

.case-study-body {
  margin-top: var(--spacing-xl);
  line-height: 1.7;
  max-width: 65ch;
}

.case-study-body h2 {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  font-weight: 400;
}

.case-study-body p {
  margin-bottom: var(--spacing-md);
}

.case-study-body code {
  background: rgba(128, 128, 128, 0.1);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
}

/* ==========================================================================
   Blog styles (Phase 03 — blog-engine)
   ========================================================================== */

/* Blog reading layout (D-01, BLOG-02) */
.reading-layout {
  max-width: 65ch;
  margin: 0 auto;
  padding: 2rem 1rem;
  line-height: 1.7;
}

.reading-layout h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--heading-weight);
  letter-spacing: var(--heading-letter-spacing);
  margin-bottom: 0.5rem;
}

/* Blog post layout with ToC sidebar (D-06) */
.blog-post-layout {
  display: block;
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 1100px) {
  .blog-post-layout {
    display: grid;
    grid-template-columns: 1fr 220px;
    gap: 2rem;
  }
}

/* Blog ToC sidebar (D-06) */
.blog-toc {
  display: none;
}

@media (min-width: 1100px) {
  .blog-toc {
    display: block;
    position: sticky;
    top: 2rem;
    max-height: calc(100vh - 4rem);
    overflow-y: auto;
    font-size: var(--font-size-sm);
    padding-top: 4rem;
  }
}

.blog-toc-mobile {
  display: block;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 0.5rem;
  font-size: var(--font-size-sm);
}

@media (min-width: 1100px) {
  .blog-toc-mobile {
    display: none;
  }
}

.blog-toc ul, .blog-toc-mobile ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.blog-toc li, .blog-toc-mobile li {
  margin-bottom: 0.5rem;
}

.blog-toc li li, .blog-toc-mobile li li {
  padding-left: 1rem;
}

.blog-toc a, .blog-toc-mobile a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.blog-toc a:hover, .blog-toc-mobile a:hover {
  color: var(--color-accent);
}

/* Blog post metadata line (D-03) */
.blog-post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: 2rem;
}

.blog-post-meta .separator {
  color: var(--color-text-subtle);
}

.blog-post-meta a {
  color: var(--color-accent);
  text-decoration: none;
}

/* Blog index cards (D-05) */
.blog-card-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.blog-card {
  display: block;
  padding: 1.5rem;
}

.blog-card h2 {
  font-size: var(--font-size-xl);
  margin-bottom: 0.5rem;
}

.blog-card-meta {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: 0.75rem;
}

.blog-card-excerpt {
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.blog-card-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  background: var(--color-bg-subtle);
  border-radius: 0.25rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Previous/next post navigation (D-08) */
.blog-prev-next {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.blog-prev-next a {
  color: var(--color-accent);
  text-decoration: none;
  max-width: 45%;
}

.blog-prev-next a:hover {
  text-decoration: underline;
}

.blog-prev-next .nav-label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.blog-prev-next .nav-date {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-subtle);
}

/* Code blocks with chroma (D-02, D-12) */
.reading-layout pre {
  overflow-x: auto;
  padding: 1rem;
  border-radius: 0.5rem;
  background: var(--color-bg-subtle);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  margin: 1.5rem 0;
}

.reading-layout code {
  font-family: 'Geist Mono', ui-monospace, monospace;
}

.reading-layout p code {
  background: var(--color-bg-subtle);
  padding: 0.125rem 0.375rem;
  border-radius: 0.25rem;
  font-size: 0.9em;
}

/* Tag page styles */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tag-list a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 0.5rem;
  color: var(--color-text);
  text-decoration: none;
  transition: all 0.2s;
}

.tag-list a:hover {
  background: var(--color-accent);
  color: var(--color-accent-text);
}

.tag-count {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* === Phase 4: Gallery, Lightbox, About === */

/* Gallery Timeline (gallery index page /photos) */
.gallery-timeline {
  display: flex;
  flex-direction: column;
}

.gallery-year {
  font-size: var(--font-size-xl);
  font-weight: var(--heading-weight);
  color: var(--color-accent);
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
}

.gallery-year:first-child {
  margin-top: 0;
}

.gallery-album-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.gallery-album {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.gallery-album-link {
  font-size: var(--font-size-xl);
  font-weight: 400;
  color: var(--color-text);
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: var(--spacing-sm);
}

.gallery-album-link:hover {
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
}

.gallery-album-count {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.gallery-preview-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.gallery-preview-img {
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-sm);
  width: 100%;
  display: block;
}

/* Photo Grid (album page /photos/{year}/{album}) */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
}

@media (max-width: 768px) {
  .photo-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .photo-grid {
    grid-template-columns: 1fr;
  }
}

.photo-grid-item {
  cursor: pointer;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-sm);
}

/* focus-visible handled by global rule above; keeping selector for specificity override */
.photo-grid-item:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.photo-grid-item img {
  aspect-ratio: 1;
  object-fit: cover;
  width: 100%;
  display: block;
  transition: opacity 150ms;
}

.photo-grid-item:hover img {
  opacity: 0.85;
}

.photo-grid-item--featured {
  grid-column: span 2;
  grid-row: span 2;
}

/* Lightbox Panel */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: oklch(0 0 0 / 0.85);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease-out;
}

.lightbox-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-panel {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: min(90vh, 800px);
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--glass-border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  z-index: 1001;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-xl);
  transform: translateY(100%);
  transition: transform 200ms ease-out;
}

@media (max-width: 768px) {
  .lightbox-panel {
    padding: var(--spacing-md);
  }
}

.lightbox-panel.active {
  transform: translateY(0);
}

.lightbox-photo {
  max-height: 70%;
  max-width: 100%;
  object-fit: contain;
  flex-shrink: 0;
}

.lightbox-caption {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--spacing-md);
  text-align: center;
  max-width: var(--reading-max);
}

.lightbox-counter {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--spacing-xs);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 2rem;
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: color 150ms;
}

.lightbox-nav:hover {
  color: var(--color-accent);
}

.lightbox-nav:disabled {
  opacity: 0.3;
  pointer-events: none;
}

.lightbox-nav--prev {
  left: var(--spacing-md);
}

.lightbox-nav--next {
  right: var(--spacing-md);
}

.lightbox-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: color 150ms;
}

.lightbox-close:hover {
  color: var(--color-accent);
}

/* About Page */
.currently-card {
  border-left: 3px solid var(--color-accent);
  position: relative;
}

.currently-updated {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
}

@media (max-width: 768px) {
  .currently-updated {
    position: static;
    margin-bottom: var(--spacing-sm);
  }
}

/* ==========================================================================
   Under Construction Page
   ========================================================================== */

.construction-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-family);
  gap: var(--spacing-xl);
  padding: var(--spacing-xl);
}

.construction-ribbon-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  text-align: center;
}

.construction-ribbon {
  font-size: var(--font-size-4xl);
  font-weight: var(--heading-weight);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  text-align: center;
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-accent);
  line-height: 1.2;
}

.construction-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  font-weight: var(--heading-weight);
  letter-spacing: 0.05em;
}

.construction-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-lg) var(--spacing-xl);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  background: linear-gradient(to top, var(--color-bg) 60%, transparent);
}

.construction-footer-social {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.construction-social-link {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
}

.construction-social-link:hover {
  color: var(--color-accent);
}

.construction-footer-legal {
  font-size: var(--font-size-sm);
  color: var(--color-text-subtle);
}

.construction-legal-link {
  color: var(--color-text-subtle);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.construction-legal-link:hover {
  color: var(--color-accent);
}

@media (max-width: 768px) {
  .construction-ribbon {
    font-size: var(--font-size-3xl);
    letter-spacing: 0.1em;
  }
}

/* --------------------------------------------------------------------------
   Profile page — Phase 11
   -------------------------------------------------------------------------- */

/* Hero */
.profile-hero {
  background-color: var(--color-bg);
  padding: var(--spacing-3xl) 0;
}

.profile-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 300;
  letter-spacing: 0.025em;
  line-height: 1.1;
  margin-bottom: var(--spacing-xs);
}

.profile-hero-subtitle {
  font-size: var(--font-size-xl);
  font-weight: 300;
  color: var(--color-text-muted);
  line-height: 1.3;
  margin-bottom: var(--spacing-lg);
}

.profile-hero-row {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

@media (min-width: 768px) {
  .profile-hero-row {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.profile-contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
}

.profile-contact-links a {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--font-size-sm);
  padding: var(--spacing-sm);
  transition: color var(--transition-fast);
}

.profile-contact-links a:hover {
  color: var(--color-accent);
}

.profile-contact-links svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.profile-pdf-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md, 6px);
  color: var(--color-accent);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.profile-pdf-btn:hover {
  background-color: var(--color-accent);
  color: var(--color-accent-text, #fff);
}

@media (max-width: 767px) {
  .profile-pdf-btn {
    width: 100%;
    justify-content: center;
  }
}

/* Sticky section nav */
.profile-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 110;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border-subtle);
  transform: translateY(-100%);
  transition: transform var(--transition-normal);
  pointer-events: none;
}

.profile-nav.visible {
  transform: translateY(0);
  pointer-events: auto;
}

.profile-nav-inner {
  display: flex;
  gap: var(--spacing-lg);
  overflow-x: auto;
  padding: var(--spacing-sm) 0;
  -webkit-overflow-scrolling: touch;
}

.profile-nav-inner a {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.profile-nav-inner a:hover {
  color: var(--color-accent);
}

/* Content sections */
.profile-section {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border-subtle);
  scroll-margin-top: 3rem;
}

.profile-section-alt {
  background-color: var(--color-bg-subtle);
}

.profile-section h2 {
  font-size: var(--font-size-2xl);
  font-weight: 300;
  margin-bottom: var(--spacing-xl);
}

/* Education list */
.profile-education-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.profile-education-list li {
  display: flex;
  gap: var(--spacing-lg);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border-subtle);
  margin-bottom: var(--spacing-xl);
}

.profile-education-list li:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.profile-edu-year {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  white-space: nowrap;
  min-width: 6rem;
  flex-shrink: 0;
}

/* Language list */
.profile-language-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* Sonstiges list */
.profile-sonstiges-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.profile-sonstiges-list li {
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border-subtle);
  margin-bottom: var(--spacing-xl);
}

.profile-sonstiges-list li:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.profile-sonstiges-year {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}