/* ── Reset & base ─────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --midd-blue:   #003b71;
  --midd-blue2:  #005eb8;
  --midd-green:  #417e3d;
  --midd-light:  #e8eef5;
  --text:        #1a1a2e;
  --muted:       #5a6a7a;
  --card-bg:     #ffffff;
  --border:      #d0dae6;
  --radius:      10px;
  --shadow:      0 2px 12px rgba(0,59,113,.10);
  --shadow-hover:0 6px 24px rgba(0,59,113,.18);
}

body {
  font-family: 'Georgia', 'Times New Roman', serif;
  background: var(--midd-light);
  color: var(--text);
  min-height: 100vh;
}

/* ── Header ───────────────────────────────────────── */
header {
  background: var(--midd-blue);
  color: #fff;
  padding: 2rem 1.5rem 1.6rem;
  text-align: center;
}

header .wordmark {
  font-size: .8rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  opacity: .75;
  margin-bottom: .4rem;
  font-family: 'Arial', sans-serif;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.2;
}

header p.subtitle {
  margin-top: .5rem;
  font-size: 1rem;
  opacity: .8;
  font-style: italic;
}

/* ── Controls ─────────────────────────────────────── */
.controls {
  max-width: 1100px;
  margin: 1.8rem auto .4rem;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.filter-label {
  font-family: 'Arial', sans-serif;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
  flex-shrink: 0;
}

.filter-buttons {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}

.filter-btn {
  background: #fff;
  border: 2px solid var(--border);
  color: var(--muted);
  border-radius: 999px;
  padding: .3rem .9rem;
  font-size: .85rem;
  font-family: 'Arial', sans-serif;
  cursor: pointer;
  transition: all .18s;
}

.filter-btn:hover {
  border-color: var(--midd-blue2);
  color: var(--midd-blue2);
}

.filter-btn.active {
  background: var(--midd-blue);
  border-color: var(--midd-blue);
  color: #fff;
}

.project-count {
  margin-left: auto;
  font-family: 'Arial', sans-serif;
  font-size: .85rem;
  color: var(--muted);
}

/* ── Gallery grid ─────────────────────────────────── */
.gallery {
  max-width: 1100px;
  margin: 0 auto 3rem;
  padding: 1rem 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

/* ── Project card ─────────────────────────────────── */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .2s, box-shadow .2s;
  cursor: pointer;
}

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

.card-thumb {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  background: var(--midd-light);
  display: block;
}

.card-thumb-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--midd-blue) 0%, var(--midd-blue2) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.4);
  font-size: 3rem;
}

.card-body {
  padding: 1rem 1.1rem 1.1rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-semester {
  font-family: 'Arial', sans-serif;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--midd-green);
  font-weight: 700;
  margin-bottom: .3rem;
}

.card-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--midd-blue);
  margin-bottom: .35rem;
}

.card-authors {
  font-size: .85rem;
  color: var(--muted);
  font-style: italic;
  margin-bottom: .8rem;
  flex: 1;
}

.card-links {
  display: flex;
  gap: .4rem;
  flex-wrap: wrap;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  font-family: 'Arial', sans-serif;
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: .25rem .65rem;
  border-radius: 999px;
  text-decoration: none;
  transition: background .15s, color .15s;
}

.chip-report   { background: #e8eef5; color: var(--midd-blue);  }
.chip-prez     { background: #e8f0e8; color: var(--midd-green); }
.chip-poster   { background: #fdf3e3; color: #7a5800;           }
.chip-demo     { background: #fce8e8; color: #8b1a1a;           }
.chip-github   { background: #1a1a2e; color: #fff;              }

.chip:hover { filter: brightness(1.08); }

/* ── Modal overlay ────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: #fff;
  border-radius: var(--radius);
  max-width: 680px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
  transform: translateY(20px);
  transition: transform .22s;
}

.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal-thumb {
  width: 100%;
  display: block;
  border-radius: var(--radius) var(--radius) 0 0;
}

.modal-body {
  padding: 1.6rem 1.8rem 2rem;
}

.modal-semester {
  font-family: 'Arial', sans-serif;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--midd-green);
  font-weight: 700;
  margin-bottom: .4rem;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--midd-blue);
  margin-bottom: .4rem;
  line-height: 1.25;
}

.modal-authors {
  font-size: .95rem;
  color: var(--muted);
  font-style: italic;
  margin-bottom: 1.1rem;
}

.modal-description {
  font-size: .95rem;
  line-height: 1.65;
  color: var(--text);
  margin-bottom: 1.2rem;
}

.modal-links {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin-bottom: 1.2rem;
}

.modal-chip {
  font-family: 'Arial', sans-serif;
  font-size: .8rem;
  font-weight: 600;
  padding: .4rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  transition: filter .15s;
}

.modal-chip:hover { filter: brightness(1.08); }

.modal-close {
  display: block;
  margin-top: .5rem;
  background: none;
  border: 2px solid var(--border);
  border-radius: 999px;
  padding: .45rem 1.2rem;
  cursor: pointer;
  font-family: 'Arial', sans-serif;
  font-size: .85rem;
  color: var(--muted);
  transition: all .15s;
}

.modal-close:hover {
  border-color: var(--midd-blue);
  color: var(--midd-blue);
}

/* ── Footer ───────────────────────────────────────── */
footer {
  background: var(--midd-blue);
  color: rgba(255,255,255,.6);
  text-align: center;
  padding: 1.2rem;
  font-family: 'Arial', sans-serif;
  font-size: .8rem;
}

footer a { color: rgba(255,255,255,.8); }

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 500px) {
  header h1 { font-size: 1.4rem; }
  .gallery { grid-template-columns: 1fr; }
}