/* ==========================================================================
   Brad Grimm Website - Custom Styles
   Design System: Clean, professional, mobile-first
   ========================================================================== */

/* CSS Variables / Design Tokens
   ========================================================================== */
:root {
  /* Colors */
  --color-primary: #e3342f;        /* Red accent (from Swiss theme) */
  --color-primary-dark: #cc1f1a;   /* Darker red for hovers */
  --color-secondary: #333333;      /* Dark gray for text */
  --color-text: #333333;           /* Body text */
  --color-heading: #000000;        /* Headings */
  --color-light-gray: #f5f5f5;     /* Light background */
  --color-border: #e0e0e0;         /* Borders */
  --color-white: #ffffff;

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.6;

  /* Spacing */
  --spacing-xs: 0.5rem;   /* 8px */
  --spacing-sm: 1rem;     /* 16px */
  --spacing-md: 1.5rem;   /* 24px */
  --spacing-lg: 2rem;     /* 32px */
  --spacing-xl: 3rem;     /* 48px */
  --spacing-xxl: 4rem;    /* 64px */

  /* Layout */
  --max-width: 1200px;
  --border-radius: 8px;
  --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --box-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition: all 0.3s ease;
}

/* Base Styles
   ========================================================================== */
* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  margin: 0;
  padding: 0;
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Navigation
   ========================================================================== */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.site-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-heading);
  text-decoration: none;
  margin: 0;
}

.site-title:hover {
  color: var(--color-primary);
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-md);
}

.nav-menu li {
  margin: 0;
}

.nav-menu a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-primary);
  background: var(--color-light-gray);
}

/* Mobile Navigation */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--spacing-xs);
  color: var(--color-text);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--box-shadow);
    display: none;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-menu a {
    display: block;
    padding: var(--spacing-sm);
  }
}

/* Hero Section
   ========================================================================== */
.hero {
  text-align: center;
  padding: var(--spacing-xxl) var(--spacing-md);
  background: linear-gradient(to bottom, var(--color-light-gray), var(--color-white));
}

.hero-image {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--spacing-md);
  display: block;
  border: 4px solid var(--color-white);
  box-shadow: var(--box-shadow);
}

.hero-image-placeholder {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: var(--color-light-gray);
  margin: 0 auto var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--color-primary);
  border: 4px solid var(--color-white);
  box-shadow: var(--box-shadow);
}

.hero h1 {
  font-size: 2.5rem;
  margin: 0 0 var(--spacing-sm);
  color: var(--color-heading);
}

.hero .tagline {
  font-size: 1.25rem;
  color: var(--color-primary);
  font-weight: 600;
  margin: 0 0 var(--spacing-sm);
}

.hero .description {
  font-size: 1.125rem;
  color: var(--color-text);
  max-width: 600px;
  margin: 0 auto;
}

/* Identity Facet Cards (2x2 Grid)
   ========================================================================== */
.facets {
  padding: var(--spacing-xl) var(--spacing-md);
}

.facets-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
  max-width: var(--max-width);
  margin: 0 auto;
}

.facet-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.facet-card:hover {
  box-shadow: var(--box-shadow-hover);
  transform: translateY(-4px);
}

.facet-icon {
  width: 64px;
  height: 64px;
  margin: 0 0 var(--spacing-md);
  color: var(--color-primary);
}

.facet-icon-placeholder {
  width: 64px;
  height: 64px;
  background: var(--color-light-gray);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--color-primary);
  margin: 0 0 var(--spacing-md);
}

.facet-card h3 {
  font-size: 1.5rem;
  margin: 0 0 var(--spacing-sm);
  color: var(--color-heading);
}

.facet-card p {
  flex: 1;
  margin: 0 0 var(--spacing-md);
  color: var(--color-text);
}

.facet-card a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: var(--transition);
}

.facet-card a:hover {
  color: var(--color-primary-dark);
  gap: var(--spacing-sm);
}

.facet-card a::after {
  content: '→';
}

/* Tablet: 2 columns */
@media (max-width: 1024px) and (min-width: 768px) {
  .facets-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile: 1 column */
@media (max-width: 768px) {
  .facets-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero .tagline {
    font-size: 1.125rem;
  }
}

/* Content Sections
   ========================================================================== */
.content-section {
  padding: var(--spacing-xl) var(--spacing-md);
  max-width: var(--max-width);
  margin: 0 auto;
}

.content-section h2 {
  font-size: 2rem;
  margin: 0 0 var(--spacing-md);
  color: var(--color-heading);
  border-bottom: 3px solid var(--color-primary);
  padding-bottom: var(--spacing-sm);
}

.content-section h3 {
  font-size: 1.5rem;
  margin: var(--spacing-lg) 0 var(--spacing-sm);
  color: var(--color-heading);
}

.content-section p {
  margin: 0 0 var(--spacing-md);
}

/* Project Cards
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.project-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.project-card:hover {
  box-shadow: var(--box-shadow-hover);
  transform: translateY(-4px);
}

.project-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
}

.project-image-placeholder {
  width: 100%;
  height: 200px;
  background: var(--color-light-gray);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.project-card h3 {
  margin: 0 0 var(--spacing-sm);
}

.project-card .tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin: var(--spacing-sm) 0;
}

.tech-tag {
  background: var(--color-light-gray);
  color: var(--color-text);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 500;
}

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

.project-links a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
}

.project-links a:hover {
  color: var(--color-primary-dark);
}

/* Publications & Media
   ========================================================================== */
.publication-entry,
.media-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.publication-entry h3,
.media-item h3 {
  margin: 0 0 var(--spacing-xs);
  font-size: 1.25rem;
}

.publication-meta,
.media-meta {
  color: #666;
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
}

/* Filter Tabs */
.filter-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.filter-tab {
  background: var(--color-light-gray);
  border: 1px solid var(--color-border);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
}

.filter-tab:hover,
.filter-tab.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

/* Blog Archive
   ========================================================================== */
.blog-archive {
  padding: var(--spacing-xl) var(--spacing-md);
  max-width: 1000px;
  margin: 0 auto;
}

.blog-archive h2 {
  font-size: 2.5rem;
  color: var(--color-heading);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.blog-notice {
  background: var(--color-light-gray);
  border-left: 4px solid var(--color-primary);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xxl);
  border-radius: var(--border-radius);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.blog-notice p {
  margin: 0;
}

.year-section {
  margin-bottom: var(--spacing-xxl);
}

.year-section h2 {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
  border-bottom: 3px solid var(--color-primary);
  padding-bottom: var(--spacing-sm);
  display: inline-block;
}

.post-entry {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.post-entry:hover {
  box-shadow: var(--box-shadow-hover);
  transform: translateY(-2px);
  border-color: var(--color-primary);
}

.post-entry h3 {
  margin: 0 0 var(--spacing-xs);
  font-size: 1.25rem;
}

.post-entry h3 a {
  color: var(--color-heading);
  text-decoration: none;
  transition: var(--transition);
}

.post-entry h3 a:hover {
  color: var(--color-primary);
}

.post-date {
  color: #999;
  font-size: 0.875rem;
  margin: 0;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.post-excerpt {
  color: var(--color-text);
  margin: var(--spacing-sm) 0 0;
}

/* Footer
   ========================================================================== */
.site-footer {
  background: var(--color-secondary);
  color: var(--color-white);
  padding: var(--spacing-xl) var(--spacing-md);
  margin-top: var(--spacing-xxl);
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  text-align: center;
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.social-links a {
  color: var(--color-white);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.social-links a:hover {
  color: var(--color-primary);
}

.footer-contact {
  font-size: 1rem;
}

.footer-contact a {
  color: var(--color-white);
  text-decoration: none;
}

.footer-contact a:hover {
  color: var(--color-primary);
}

.footer-copyright {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  margin: var(--spacing-sm) 0 0;
}

/* About Page
   ========================================================================== */
.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-section {
  margin-bottom: var(--spacing-xl);
}

.about-section h3 {
  font-size: 1.5rem;
  color: var(--color-heading);
  margin-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: var(--spacing-xs);
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  list-style: none;
  padding: 0;
}

.skills-list li {
  background: var(--color-light-gray);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  font-weight: 500;
}

/* Utility Classes
   ========================================================================== */
.text-center {
  text-align: center;
}

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  border-radius: 4px;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--box-shadow);
}

.btn-secondary {
  background: var(--color-light-gray);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

/* Responsive adjustments
   ========================================================================== */
@media (max-width: 768px) {
  :root {
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
  }

  .content-section h2 {
    font-size: 1.75rem;
  }

  .footer-content {
    gap: var(--spacing-sm);
  }
}