/* ===========================================
   Bo Jakobsen - Personal Website
   Modern tech/engineering aesthetic

   =========================================== */

/* --- CSS Custom Properties --- */
:root {
 /* Colors - muted sophisticated palette */
  --color-bg: #D7D1D1;           /* warm light pink-grey */
  --color-bg-alt: #D1D7D7;       /* cool mint-grey */
  --color-surface: #e8e4e4;      /* slightly lighter than bg */
  --color-text: #424341;         /* dark charcoal */
  --color-text-muted: #5a5a59;
  --color-text-light: #7a7a79;
  --color-accent: #424341;       /* dark charcoal */
  --color-border: #AAAFAF;       /* steel grey */
  --color-link: #6b6483;         /* muted purple from AFA9B4 darkened */
  --color-link-hover: #424341;   /* dark on hover */
  --color-accent-dot: var(--color-link);  /* #6b6483 */
  
  /* Typography */
  --font-heading: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Consolas', monospace;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  
  /* Layout */
  --max-width: 800px;
  --border-radius: 4px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 var(--space-md) 0;
  color: var(--color-accent);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.5rem;
  margin-top: var(--space-xl);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-border);
}

h3 {
  font-size: 1.2rem;
  color: var(--color-text);
}

p {
  margin: 0 0 var(--space-md) 0;
}

/* --- Links --- */
a {
  color: var(--color-link);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg);
}

/* --- Header / Hero --- */
.hero {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  padding: var(--space-xl) 0;
  /* border-bottom: 1px solid var(--color-border); */
}

.hero-photo {
  flex-shrink: 0;
}

.hero-photo img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  filter: grayscale(20%);
  border: 3px solid var(--color-border);
}

.hero-content {
  flex: 1;
}

.hero-title {
  margin-bottom: var(--space-xs);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  font-weight: 400;
}

.hero-tagline {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* --- Navigation Links --- */
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg-alt);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  color: var(--color-text);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-links a:hover {
  background: var(--color-accent);
  color: white;
  text-decoration: none;
}

/* --- Sections --- */
.section {
  padding: var(--space-lg) 0;
}

.section > :first-child {
  margin-top: 0;
}


.section + .section {
  /* border-top: 1px solid var(--color-border); */
}

/* --- Link Cards --- */
.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.link-card {
  display: block;
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.link-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  text-decoration: none;
}

.link-card-title {
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.link-card-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* --- Simple links --- */

.link-accent {
  display: flex;
  align-items: center;
  padding: var(--space-xs) 0;
  color: var(--color-text);
}

.link-accent::before {
  content: "●";
  color: var(--color-accent-dot);
  margin-right: var(--space-sm);
  font-size: 0.75em;
}

.link-accent:hover {
  color: var(--color-link);
  text-decoration: none;
}


/* --- Simple List --- */
.simple-list {
  list-style: none;
  padding: 0;
  margin: var(--space-md) 0;
}

.simple-list li {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.simple-list li:last-child {
  border-bottom: none;
}

/* --- Contact Info --- */
.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
}

.contact-list li {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.contact-list .label {
  color: var(--color-text-light);
  font-size: 0.85rem;
}

.contact-list .value {
  font-size: 0.95rem;
}

/* --- Footer --- */
.footer {
  margin-top: var(--space-xl);
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* --- Subpage Header --- */
.page-header {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

.page-header .back-link {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  display: inline-block;
}

.page-header .back-link:hover {
  color: var(--color-link);
}

.page-header h1 {
  margin-bottom: 0;
}

/* --- Content (for subpages) --- */
.content {
  padding: var(--space-lg) 0;
}

.contents > :first-child {
  margin-top: 0;
}

.content p {
  max-width: 65ch;
}

.content ul, .content ol {
  padding-left: var(--space-lg);
}

.content li {
  margin-bottom: var(--space-sm);
}

/* --- Heading Groups (title + subtitle) --- */
hgroup {
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-border);
}

hgroup h2 {
  margin: 0;
  border-bottom: none;
}

hgroup p {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin: var(--space-xs) 0 0 0;
}



/* --- Showcase Items --- */
.showcase-item {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-md) 0;
}

.showcase-item + .showcase-item {
  border-top: 1px solid var(--color-border);
}

.showcase-image {
  flex-shrink: 0;
  width: 150px;
}

.showcase-image img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
}

.showcase-content h3 {
  margin: 0 0 var(--space-xs) 0;
}

.showcase-content p {
  margin: 0;
  color: var(--color-text-muted);
}

@media (max-width: 500px) {
  .showcase-item {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .showcase-image {
    width: 100%;
    max-width: 200px;
  }
}



/* --- Thesis Intro (two-column with image) --- */
.thesis-intro {
  display: flex;
  gap: var(--space-lg);
  margin: var(--space-lg) 0;
}

.thesis-intro-text {
  flex: 1;
}

.thesis-intro-image {
  flex-shrink: 0;
  max-width: 280px;
}

.thesis-intro-image img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
}

@media (max-width: 700px) {
  .thesis-intro {
    flex-direction: column-reverse;
  }
  
  .thesis-intro-image {
    max-width: 100%;
  }
}

/* --- Image Gallery --- */
.image-gallery {
  margin: var(--space-lg) 0;
}

.image-gallery figure {
  margin: 0 0 var(--space-lg) 0;
  padding: 0;
}

.image-gallery img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
}

.image-gallery figcaption {
  margin-top: var(--space-sm);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-style: italic;
}

/* --- Utility Classes --- */
.text-muted {
  color: var(--color-text-muted);
}

.text-small {
  font-size: 0.9rem;
}

.mono {
  font-family: var(--font-mono);
}

.mt-lg {
  margin-top: var(--space-lg);
}

/* --- Responsive --- */
@media (max-width: 600px) {
  :root {
    --space-lg: 1.5rem;
    --space-xl: 2.5rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  .hero {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  
  .hero-photo img {
    width: 100px;
    height: 100px;
  }
  
  .nav-links {
    justify-content: center;
  }
  
  .link-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Publication List --- */

.pub-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.pub-nav a {
  font-size: 0.85rem;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg-alt);
  border-radius: var(--border-radius);
  color: var(--color-text);
}

.pub-nav a:hover {
  background: var(--color-accent);
  color: white;
  text-decoration: none;
}

.pub-entry {
  margin-bottom: var(--space-md);
  padding-left: var(--space-md);
  border-left: 2px solid var(--color-border);
  font-size: 0.95rem;
  line-height: 1.5;
}

.pub-entry em {
  color: var(--color-text);
}

.pub-type {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  margin-right: var(--space-xs);
}

.pub-note {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: var(--space-xs);
}

.pub-more {
  color: var(--color-text-muted);
  font-style: italic;
  border-left-color: transparent;
}

.abstract {
  display: none;
  margin-top: var(--space-sm);
  padding: var(--space-sm);
  background: var(--color-surface);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
}

.abstract.show {
  display: block;
}

.abstract-toggle {
  font-size: 0.75rem;
  padding: 0.1rem 0.4rem;
  margin-left: var(--space-xs);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  cursor: pointer;
}

.abstract-toggle:hover {
  background: var(--color-accent);
  color: white;
}