/* ==============================================
   DESIGN TOKENS & CSS VARIABLES
   ============================================== */

:root {
  /* Colors */
  --color-blue: #2563eb;
  --color-red: #dc2626;
  --color-green: #059669;
  --color-orange: #f97316;
  --color-purple: #7c3aed;
  --color-teal: #0891b2;
  --color-gold: #d97706;
  --color-pink: #ec4899;
  --color-cyan: #06b6d4;
  --color-magenta: #d946ef;
  --color-lime: #84cc16;
  --color-coral: #ff7f50;
  --color-indigo: #4f46e5;

  /* Light theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --border-light: #e5e7eb;
  --border-lighter: #f0f0f0;

  /* Dark theme */
  --bg-primary-dark: #0f172a;
  --bg-secondary-dark: #1e293b;
  --bg-tertiary-dark: #334155;
  --text-primary-dark: #f1f5f9;
  --text-secondary-dark: #cbd5e1;
  --text-tertiary-dark: #94a3b8;
  --border-light-dark: #334155;

  /* Layout */
  --max-width: 900px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Typography */
  --font-display: 'Georgia', 'Garamond', serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-mono: 'Courier New', monospace;

  /* Shadows & Effects */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode override */
body.dark-mode {
  --bg-primary: var(--bg-primary-dark);
  --bg-secondary: var(--bg-secondary-dark);
  --bg-tertiary: var(--bg-tertiary-dark);
  --text-primary: var(--text-primary-dark);
  --text-secondary: var(--text-secondary-dark);
  --text-tertiary: var(--text-tertiary-dark);
  --border-light: var(--border-light-dark);
}

/* ==============================================
   RESET & BASE STYLES
   ============================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  transition: var(--transition);
  overflow-x: hidden;
}

/* ==============================================
   TYPOGRAPHY
   ============================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.5px;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 3rem;
  font-weight: 300;
  letter-spacing: -1px;
}

h2 {
  font-size: 1.875rem;
  font-weight: 300;
  margin-top: var(--spacing-xl);
  color: var(--text-primary);
}

h3 {
  font-size: 1.25rem;
  font-weight: 400;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

a {
  color: var(--color-blue);
  text-decoration: none;
  transition: var(--transition);
  border-bottom: 1px solid transparent;
}

a:hover {
  border-bottom-color: currentColor;
  opacity: 0.85;
}

/* ==============================================
   PAGE WRAPPER & LAYOUT
   ============================================== */

.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--bg-primary);
}

.main-content {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-lg);
  padding-top: var(--spacing-2xl);
}

/* Mobile */
@media (max-width: 768px) {
  .main-content {
    padding: var(--spacing-sm);
    padding-top: var(--spacing-lg);
    max-width: 100%;
    overflow-x: hidden;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.375rem;
    margin-top: var(--spacing-lg);
  }

  .header-content {
    padding: var(--spacing-sm);
  }

  .portfolio-item {
    grid-template-columns: 90px 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    overflow-x: hidden;
  }

  .portfolio-thumbnail {
    min-width: 90px;
    max-width: 90px;
  }

  .portfolio-title {
    font-size: 1.125rem;
  }

  .portfolio-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .portfolio-tags {
    width: 100%;
    overflow-x: auto;
  }

  .filter-section {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
  }

  .filter-controls {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }

  .year-select {
    width: 100%;
  }
}

/* ==============================================
   HEADER
   ============================================== */

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

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

.logo {
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 2px;
  color: var(--text-primary);
  margin: 0;
}

.logo span {
  opacity: 0.5;
}

.nav {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-item {
  background: none;
  border: 2px solid var(--border-light);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  transition: var(--transition);
  color: var(--text-primary);
}

.nav-item:hover {
  border-color: var(--color-blue);
  background-color: var(--bg-secondary);
}

.theme-icon {
  display: block;
  transition: transform 0.3s ease;
}

.dark-mode .theme-icon {
  content: '🌙';
}

.hamburger {
  font-size: 1.5rem;
  display: none;
}

@media (max-width: 768px) {
  .header-content {
    padding: var(--spacing-sm);
  }

  .header-subtitle {
    padding: 0 var(--spacing-sm) var(--spacing-sm);
  }

  .subtitle {
    font-size: 0.875rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  .intro-links {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .footer-content {
    padding: var(--spacing-md);
  }

  .footer-links {
    font-size: 0.85rem;
  }
}

.header-subtitle {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  border-top: 1px solid var(--border-lighter);
}

.subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0;
  padding-top: var(--spacing-md);
}

.accent-text {
  color: var(--text-primary);
  font-weight: 500;
}

/* ==============================================
   INTRO SECTION
   ============================================== */

.intro-section {
  margin-bottom: var(--spacing-2xl);
  overflow-x: hidden;
}

.intro-section h2 {
  margin-top: 0;
  font-size: 2rem;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.intro-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.link-accent {
  position: relative;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-weight: 400;
  border-radius: 4px;
}

/* Thin colored parenthesis borders */
.link-accent::before {
  content: '(';
  margin-right: 0.25rem;
  opacity: 0.4;
}

.link-accent::after {
  content: ')';
  margin-left: 0.25rem;
  opacity: 0.4;
}

.link-accent.blue {
  color: var(--color-blue);
}

.link-accent.blue::before,
.link-accent.blue::after {
  color: var(--color-blue);
}

.link-accent.green {
  color: var(--color-green);
}

.link-accent.green::before,
.link-accent.green::after {
  color: var(--color-green);
}

.link-accent:hover {
  border-bottom: none;
}

.link-accent:hover::before,
.link-accent:hover::after {
  opacity: 0.8;
}

/* ==============================================
   FILTER SECTION
   ============================================== */

.filter-section {
  margin-bottom: var(--spacing-2xl);
  padding: var(--spacing-lg);
  background-color: var(--bg-secondary);
  border-radius: 8px;
  border-left: 2px solid var(--color-blue);
}

.filter-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.filter-label {
  font-weight: 400;
  color: var(--text-primary);
  margin: 0;
}

.year-select {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  cursor: pointer;
  transition: var(--transition);
}

.year-select:hover,
.year-select:focus {
  border-color: var(--color-blue);
  outline: none;
}

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

  .filter-controls {
    flex-direction: column;
    align-items: flex-start;
  }

  .year-select {
    width: 100%;
  }
}

/* ==============================================
   PORTFOLIO GRID
   ============================================== */

.portfolio-section {
  margin-bottom: var(--spacing-2xl);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
}

.portfolio-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--spacing-xl);
  padding: var(--spacing-lg);
  background-color: var(--bg-secondary);
  border-radius: 8px;
  border: 1px solid var(--border-light);
  transition: var(--transition);
  animation: slideInUp 0.5s ease-out forwards;
  opacity: 0;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.portfolio-item:hover {
  border-color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
}

.portfolio-thumbnail {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  aspect-ratio: 3/4;
  background-color: var(--bg-tertiary);
}

.portfolio-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.portfolio-item:hover .portfolio-thumbnail img {
  transform: scale(1.02);
}

.portfolio-content {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.portfolio-header {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.portfolio-year {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  font-weight: 400;
  letter-spacing: 1px;
  text-transform: uppercase;
  min-width: 45px;
}

.portfolio-title {
  font-size: 1.5rem;
  font-family: var(--font-display);
  font-weight: 400;
  margin: 0;
  color: var(--text-primary);
  line-height: 1.3;
}

.portfolio-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin: 0;
  font-style: italic;
}

.portfolio-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: var(--spacing-md) 0;
  line-height: 1.6;
}

.portfolio-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-light);
}

.portfolio-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.tag {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.75rem;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: 3px;
  text-transform: lowercase;
  border-left: 2px solid currentColor;
  transition: var(--transition);
}

.tag:hover {
  background-color: var(--bg-primary);
  border-left-width: 3px;
}

.portfolio-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.portfolio-link:hover {
  border-color: var(--color-blue);
  background-color: var(--bg-primary);
}

/* Color assignment based on data-color attribute */
.portfolio-item[data-color="blue"] .color-accent { color: var(--color-blue); }
.portfolio-item[data-color="red"] .color-accent { color: var(--color-red); }
.portfolio-item[data-color="green"] .color-accent { color: var(--color-green); }
.portfolio-item[data-color="orange"] .color-accent { color: var(--color-orange); }
.portfolio-item[data-color="purple"] .color-accent { color: var(--color-purple); }
.portfolio-item[data-color="teal"] .color-accent { color: var(--color-teal); }
.portfolio-item[data-color="gold"] .color-accent { color: var(--color-gold); }
.portfolio-item[data-color="pink"] .color-accent { color: var(--color-pink); }
.portfolio-item[data-color="cyan"] .color-accent { color: var(--color-cyan); }
.portfolio-item[data-color="magenta"] .color-accent { color: var(--color-magenta); }
.portfolio-item[data-color="lime"] .color-accent { color: var(--color-lime); }
.portfolio-item[data-color="coral"] .color-accent { color: var(--color-coral); }
.portfolio-item[data-color="indigo"] .color-accent { color: var(--color-indigo); }

/* Colored parenthesis accents on titles */
.portfolio-title::before {
  content: '(';
  opacity: 0.3;
  margin-right: 0.25rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.portfolio-item:hover .portfolio-title::before {
  opacity: 0.5;
}

.portfolio-title::after {
  content: ')';
  opacity: 0.3;
  margin-left: 0.25rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.portfolio-item:hover .portfolio-title::after {
  opacity: 0.5;
}

.portfolio-item[data-color="blue"] .portfolio-title::before,
.portfolio-item[data-color="blue"] .portfolio-title::after {
  color: var(--color-blue);
}

.portfolio-item[data-color="red"] .portfolio-title::before,
.portfolio-item[data-color="red"] .portfolio-title::after {
  color: var(--color-red);
}

.portfolio-item[data-color="green"] .portfolio-title::before,
.portfolio-item[data-color="green"] .portfolio-title::after {
  color: var(--color-green);
}

.portfolio-item[data-color="orange"] .portfolio-title::before,
.portfolio-item[data-color="orange"] .portfolio-title::after {
  color: var(--color-orange);
}

.portfolio-item[data-color="purple"] .portfolio-title::before,
.portfolio-item[data-color="purple"] .portfolio-title::after {
  color: var(--color-purple);
}

.portfolio-item[data-color="teal"] .portfolio-title::before,
.portfolio-item[data-color="teal"] .portfolio-title::after {
  color: var(--color-teal);
}

.portfolio-item[data-color="gold"] .portfolio-title::before,
.portfolio-item[data-color="gold"] .portfolio-title::after {
  color: var(--color-gold);
}

.portfolio-item[data-color="pink"] .portfolio-title::before,
.portfolio-item[data-color="pink"] .portfolio-title::after {
  color: var(--color-pink);
}

.portfolio-item[data-color="cyan"] .portfolio-title::before,
.portfolio-item[data-color="cyan"] .portfolio-title::after {
  color: var(--color-cyan);
}

.portfolio-item[data-color="magenta"] .portfolio-title::before,
.portfolio-item[data-color="magenta"] .portfolio-title::after {
  color: var(--color-magenta);
}

.portfolio-item[data-color="lime"] .portfolio-title::before,
.portfolio-item[data-color="lime"] .portfolio-title::after {
  color: var(--color-lime);
}

.portfolio-item[data-color="coral"] .portfolio-title::before,
.portfolio-item[data-color="coral"] .portfolio-title::after {
  color: var(--color-coral);
}

.portfolio-item[data-color="indigo"] .portfolio-title::before,
.portfolio-item[data-color="indigo"] .portfolio-title::after {
  color: var(--color-indigo);
}

/* Responsive grid */
@media (max-width: 1024px) {
  .portfolio-item {
    grid-template-columns: 120px 1fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
  }

  .portfolio-thumbnail {
    min-width: 120px;
  }
}

@media (max-width: 768px) {
  .portfolio-item {
    grid-template-columns: 90px 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    overflow-x: hidden;
  }

  .portfolio-thumbnail {
    min-width: 90px;
    max-width: 90px;
  }

  .portfolio-title {
    font-size: 1.125rem;
  }

  .portfolio-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .portfolio-tags {
    width: 100%;
  }
}

/* ==============================================
   ARCHIVE SECTION
   ============================================== */

.archive-section {
  text-align: center;
  padding: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  border-top: 1px solid var(--border-light);
}

.archive-text {
  color: var(--text-tertiary);
  font-size: 0.95rem;
  font-style: italic;
  margin: 0;
}

/* ==============================================
   FOOTER
   ============================================== */

.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  margin-top: auto;
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-lg);
  text-align: center;
}

.footer-links {
  margin-bottom: var(--spacing-md);
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 0 var(--spacing-sm);
}

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

.divider {
  color: var(--text-tertiary);
}

.footer-credit {
  color: var(--text-tertiary);
  font-size: 0.85rem;
  margin: 0;
}

/* ==============================================
   UTILITIES
   ============================================== */

.hidden {
  display: none !important;
}

.loading {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--text-secondary);
}

.loading::after {
  content: '...';
  animation: dots 1.5s infinite;
}

@keyframes dots {
  0%, 20% { content: '.'; }
  40% { content: '..'; }
  60%, 100% { content: '...'; }
}

/* ==============================================
   PRINT STYLES
   ============================================== */

@media print {
  body {
    background: white;
  }

  .nav,
  .filter-section,
  .footer {
    display: none;
  }

  .portfolio-item {
    page-break-inside: avoid;
  }
}