/* ==========================================================================
   Custom Properties
   ========================================================================== */

:root {
  /* Brand Colors */
  --color-brand: #002145;
  --color-link: #1a5276;
  --color-accent: #d4a012;

  /* Surfaces */
  --color-bg: #fefefe;
  --color-bg-muted: #f7f7f7;

  /* Text Hierarchy */
  --color-text: #1a1a1a;
  --color-text-2: #444;
  --color-text-3: #666;

  /* Borders */
  --color-border: #ddd;
  --color-border-subtle: #eee;

  /* Typography */
  --font-serif: 'Source Serif 4', Georgia, serif;
  --font-sans: 'Source Sans 3', 'Helvetica Neue', Arial, sans-serif;

  --font-size-xs: 0.875rem;  /* 14px */
  --font-size-sm: 1rem;      /* 16px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.75rem;  /* 28px */
  --font-size-4xl: 2rem;     /* 32px */

  /* Spacing (aliases to Open Props) */
  --space-1: var(--size-1);  /* 4px */
  --space-2: var(--size-2);  /* 8px */
  --space-3: var(--size-3);  /* 12px */
  --space-4: var(--size-4);  /* 16px */
  --space-5: var(--size-5);  /* 20px */
  --space-6: var(--size-6);  /* 24px */
  --space-7: var(--size-7);  /* 32px */
  --space-8: var(--size-8);  /* 40px */
  --space-9: var(--size-9);  /* 48px */
}

/* ==========================================================================
   Dark Mode
   ========================================================================== */

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1a1a1a;
    --color-bg-muted: #252525;
    --color-text: #e0e0e0;
    --color-text-2: #bbb;
    --color-text-3: #888;
    --color-link: #6db3d9;
    --color-brand: #6db3d9;
    --color-border: #444;
    --color-border-subtle: #333;
  }
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  font-size: var(--font-size-base);
}

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

a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Header
   ========================================================================== */

header {
  border-bottom: 3px solid var(--color-brand);
  padding: var(--space-5) 0;
  margin-bottom: var(--space-7);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.site-title {
  font-family: var(--font-serif);
  font-size: var(--font-size-4xl);
  font-weight: 600;
  color: var(--color-brand);
  letter-spacing: -0.01em;
}

.site-title .ubc-link {
  font-weight: 400;
  color: var(--color-text-2);
}

.site-title .ubc-link:hover {
  color: var(--color-brand);
  text-decoration: none;
}

.site-title a {
  color: inherit;
  text-decoration: none;
}

.site-title a:hover {
  text-decoration: none;
}

.header-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.site-nav {
  display: flex;
  gap: var(--space-6);
  font-size: 17px;
}

.site-nav a {
  color: var(--color-text-2);
}

.site-nav a:hover {
  color: var(--color-brand);
}

@media (max-width: 600px) {
  .header-row {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .site-title {
    font-size: var(--font-size-2xl);
  }

  .site-nav {
    gap: var(--space-5);
  }
}

/* ==========================================================================
   Main Layout - 3 columns
   ========================================================================== */

.main-grid {
  display: grid;
  grid-template-columns: 240px 1fr 280px;
  column-gap: var(--space-8);
  align-items: start;
}

.grid-left {
  grid-column: 1;
}

.grid-center {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.grid-right {
  grid-column: 3;
  font-size: var(--font-size-sm);
}

/* Center column spacing */
.grid-tagline     { margin-bottom: var(--space-3); }
.grid-courses     { margin-bottom: var(--space-5); }
.grid-prospective { margin-bottom: 0; }

@media (max-width: 900px) {
  .main-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-7);
  }

  .grid-left {
    display: contents;
  }

  .grid-center {
    display: contents;
  }

  .grid-tagline     { order: 1; margin-bottom: 0; }
  .grid-courses     { order: 2; margin-bottom: 0; }
  .grid-prospective { order: 3; margin-bottom: 0; }
  .grid-faculty     { order: 4; }
  .grid-students    { order: 5; }
  .grid-right       { order: 6; }
}

/* ==========================================================================
   People Sections
   ========================================================================== */

.section-title {
  font-size: 15px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-brand);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-3);
}

.faculty-list {
  margin-bottom: var(--space-7);
}

.faculty-member {
  margin-bottom: var(--space-3);
}

.faculty-name {
  font-weight: 600;
  color: var(--color-link);
  display: block;
}

.faculty-area {
  color: var(--color-text-2);
  line-height: 1.4;
}

.students-list {
  column-count: 2;
  column-gap: var(--space-4);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-7);
}

.student-name {
  break-inside: avoid;
  margin-bottom: var(--space-1);
}

.student-name a {
  color: var(--color-text);
}

.student-years {
  display: block;
  color: var(--color-text-2);
  font-size: 11px;
}

/* ==========================================================================
   Center Column - Main Content
   ========================================================================== */

.tagline {
  font-family: var(--font-serif);
  font-size: var(--font-size-xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  font-style: italic;
}

/* Dictionary Entry */
.dict-entry {
  margin-bottom: var(--space-5);
  padding-left: 2px;
}

.dict-headword {
  font-family: var(--font-serif);
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--color-brand);
  display: inline;
  margin-right: var(--space-3);
}

.dict-meta {
  display: block;
  margin-top: var(--space-1);
}

.dict-pronunciation {
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  color: var(--color-text-3);
  font-style: normal;
  letter-spacing: 0.02em;
}

.dict-pos {
  font-family: var(--font-serif);
  font-size: var(--font-size-sm);
  font-style: italic;
  color: var(--color-text-2);
  margin-left: var(--space-2);
}

.dict-definition {
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  color: var(--color-text);
  margin: var(--space-2) 0 var(--space-2) 0;
  line-height: 1.5;
  font-style: italic;
}

.dict-seealso {
  font-size: 15px;
  color: var(--color-text-2);
  margin-top: var(--space-1);
}

.dict-seealso .dict-label {
  font-variant: small-caps;
  font-weight: 500;
  letter-spacing: 0.03em;
  margin-right: var(--space-1);
}

.dict-seealso a {
  color: var(--color-link);
  font-style: italic;
}

.about-text {
  color: var(--color-text);
  margin-bottom: var(--space-7);
  line-height: 1.65;
}

/* Courses Block */
.courses-block {
  background: var(--color-bg-muted);
  border-left: 3px solid var(--color-brand);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-7);
}

.courses-block h3 {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-2);
  margin-bottom: var(--space-3);
}

.course-item {
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
}

.course-term {
  display: inline-block;
  background: var(--color-brand);
  color: white;
  font-size: 10px;
  padding: 2px var(--space-2);
  border-radius: 2px;
  margin-right: var(--space-2);
  font-weight: 600;
}

.course-title {
  color: var(--color-link);
}

.course-instructor {
  color: var(--color-text-2);
  font-size: 15px;
}

/* Prospective Students Block */
.prospective-block {
  background: var(--color-bg-muted);
  border-left: 3px solid var(--color-brand);
  padding: var(--space-4) var(--space-5);
}

.prospective-block h2 {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-2);
  margin-bottom: var(--space-3);
}

.prospective-block p {
  margin-bottom: var(--space-3);
  line-height: 1.65;
  color: var(--color-text);
  font-size: var(--font-size-sm);
}

.prospective-block p:last-child {
  margin-bottom: 0;
}

/* Alumni Summary */
.alumni-summary {
  font-size: var(--font-size-sm);
  color: var(--color-text-2);
  line-height: 1.5;
}

.alumni-summary a {
  white-space: nowrap;
  color: var(--color-link);
}

/* People Card */
.people-card {
  background: var(--color-bg-muted);
  border-left: 3px solid var(--color-brand);
  padding: var(--space-4) var(--space-5);
  margin-top: var(--space-7);
}

.people-card .section-title {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-2);
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: var(--space-3);
}

.people-stats {
  margin-bottom: var(--space-4);
}

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: var(--space-1) 0;
  font-size: var(--font-size-sm);
}

.stat-label {
  color: var(--color-text);
}

.stat-value {
  font-weight: 600;
  color: var(--color-brand);
  font-variant-numeric: tabular-nums;
}

.stat-row.stat-alumni {
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-2);
  padding-top: var(--space-2);
}

.people-cta {
  display: block;
  font-size: 15px;
  color: var(--color-link);
  font-weight: 500;
}

/* ==========================================================================
   Publications
   ========================================================================== */

.pub-item {
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-border-subtle);
}

.pub-item:last-child {
  border-bottom: none;
}

.pub-title {
  font-weight: 600;
  color: var(--color-link);
  line-height: 1.4;
  margin-bottom: var(--space-1);
}

.pub-authors {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-2);
  margin-bottom: 2px;
}

.pub-venue {
  font-size: var(--font-size-xs);
  color: var(--color-text-3);
}

.view-all {
  font-size: 15px;
  display: block;
  margin-top: var(--space-3);
}

/* Publications Page */
.publications-page h1 {
  font-family: var(--font-serif);
  font-size: var(--font-size-3xl);
  font-weight: 600;
  color: var(--color-brand);
  margin-bottom: var(--space-2);
}

.publications-page .pub-count {
  color: var(--color-text-2);
  margin-bottom: var(--space-7);
}

.publications-page .pub-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--size-fluid-2);
  align-items: start;
}

.publications-page .pub-item {
  margin-bottom: 1.5rem;
  padding-bottom: 0;
  border-bottom: none;
}

@media (max-width: 900px) {
  .publications-page .pub-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .publications-page .pub-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   People Page
   ========================================================================== */

.page-title {
  font-family: var(--font-serif);
  font-size: var(--font-size-3xl);
  font-weight: 600;
  color: var(--color-brand);
  margin-bottom: var(--space-7);
}

.people-section {
  margin-bottom: var(--space-8);
}

.faculty-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}

.faculty-grid .faculty-member {
  margin-bottom: 0;
}

.faculty-dept {
  display: block;
  font-size: 15px;
  color: var(--color-text-2);
}

.students-grid {
  column-count: 2;
  column-gap: var(--space-8);
}

@media (max-width: 600px) {
  .students-grid {
    column-count: 1;
  }
}

.student-entry {
  break-inside: avoid;
  margin-bottom: var(--space-2);
}

.student-meta {
  color: var(--color-text-2);
  font-size: var(--font-size-sm);
}

/* ==========================================================================
   Breadcrumb Navigation
   ========================================================================== */

.breadcrumb {
  font-size: 15px;
  color: var(--color-text-2);
  margin-bottom: var(--space-4);
}

.breadcrumb a {
  color: var(--color-link);
}

.breadcrumb span[aria-current="page"] {
  color: var(--color-text);
}

/* ==========================================================================
   Footer
   ========================================================================== */

footer {
  margin-top: var(--space-9);
  padding: var(--space-7) 0;
  border-top: 1px solid var(--color-border);
  font-size: 15px;
  color: var(--color-text-2);
}

.footer-content {
  display: flex;
  justify-content: space-between;
}

.footer-meta {
  text-align: right;
  font-size: var(--font-size-xs);
  color: var(--color-text-3);
}