/* =========================
   1. Design Tokens
========================= */

:root {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --color-primary: #2563eb;

  --radius-md: 12px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);

  --space-xl: 4rem;
  --space-lg: 2.5rem;
  --space-md: 1.5rem;
  --space-sm: 1rem;
}

/* =========================
   2. Base
========================= */

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

body {
  margin: 10;
  font-family: Inter, system-ui, -apple-system, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
}

h1 {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

/* =========================
   3. Layout
========================= */

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

.page-section {
  padding: var(--space-xl) 0;
}

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

@media (max-width: 768px) {
  .nav-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .nav-links {
    display: flex;
    flex-wrap: wrap;
  }

  .nav-links a {
    margin-left: 0;
    margin-right: 1rem;
  }
}

.navbar {
  background: white;
  border-top: 1px solid #e5e7eb;
  border-bottom: 4px solid var(--color-primary);
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-primary);
  padding: 0.5rem 0;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 2rem;
}

.logo {
  height: 48px;
  width: auto;
}

.nav-links a {
  margin-left: 2rem;
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

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

.nav-links a.active {
  color: var(--color-primary);
  font-weight: 600;
}

/* =========================
   5. Card Grid
========================= */

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

.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
}

.card img {
  width: 100%;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

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

.card p {
  color: var(--color-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.card-tags {
  margin: var(--space-sm) 0;
}

.tag {
  display: inline-block;
  background: #e5edff;
  color: var(--color-primary);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  margin-right: 6px;
}

.card a {
  margin-top: auto;
  text-decoration: none;
  color: var(--color-primary);
  font-weight: 500;
}

/* Horizontal card variant */
.card--horizontal {
  flex-direction: row;
  align-items: flex-start;
  gap: var(--space-md);
}

.card--horizontal img {
  width: 160px;
  height: auto;
  margin-bottom: 0;
  flex-shrink: 0;
}

.card-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.card-content h3,
.card-content p {
  margin: 0;
}

.card--horizontal .card-tags {
  margin: 0;
}

@media (max-width: 768px) {
  .card--horizontal {
    flex-direction: column;
  }

  .card--horizontal img {
    width: 100%;
  }
}

.pub-links {
  margin: 0;
}

.pub-link {
  color: var(--color-primary);
  padding: 0px 0px;
  margin-right: 32px;
}

/* =========================
   5. Accordians
========================= */

.accordion {
  margin: auto;
}

.accordion-item {
  background: white;
  border-radius: 8px;
  margin-bottom: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  overflow: hidden;
}

.accordion-header {
  width: 100%;
  background: none;
  border: none;
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.arrow {
  width: 10px;
  height: 10px;
  border-right: 2px solid #333;
  border-bottom: 2px solid #333;
  transform: rotate(45deg);
  transition: transform 0.3s ease;
}

/* Rotate arrow when open */
.accordion-item.open .arrow {
  transform: rotate(225deg);
}

.accordion-content {
  height: 0;
  overflow: hidden;
  transition: height 0.3s ease;
}

.accordion-inner {
  padding: 0 20px 20px 20px;
}


/* =========================
   6. Icon rows
========================= */

.icon-row {
  display: flex;
  gap: 16px;              /* space between icons */
  align-items: center;
}

.icon-row a {
  display: inline-flex;   /* better click area */
  width: 32px;
  height: 32px;
}

.icon-row img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Optional hover effect */
.icon-row a:hover {
  opacity: 0.7;
  transform: scale(1.1);
  transition: 0.2s ease;
}


/* =========================
   7. Tables
========================= */


table {
  width: 100%;
  border-collapse: collapse;   /* cleaner look */
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 15px;
}

table th,
table td {
  padding: 18px 24px;          /* generous whitespace */
  text-align: left;
}

table thead {
  background: #f5f7fa;
}

table th {
  font-weight: 600;
  letter-spacing: 0.03em;
  font-size: 0.85rem;
  text-transform: uppercase;
  color: #1d1d1d;
}

table tbody tr {
  border-bottom: 1px solid #eee;
}

table tbody tr:hover {
  background-color: #fafafa;
}



/* =========================
   Projects
========================= */


.big-tags {
  margin: var(--space-sm) 0;
}

.big-tag {
  display: inline-block;
  background: #e5edff;
  color: var(--color-primary);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 1rem;
  margin-right: 6px;
}

.project_grid {
  display: grid;
  grid-template-columns: 3fr 1fr;  /* 3:1 ratio */
  gap: 40px;                       /* space between columns */
  max-width: 1200px;
  margin: 0 auto;
  padding: 0px;
}



/* =========================
   Small profiles
========================= */

.profile {
  display: flex;
  align-items: center;  
  gap: 6px;
}

.avatar-small {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}