@import url('https://fonts.googleapis.com/css2?family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=DM+Sans:wght@300;400;500&display=swap');

:root {
  --maroon: #881c3c;
  --maroon-dark: #6a1530;
  --grey: #6b7280;
  --light-grey: #f0f0f0;
  --border: #d1d5db;
  --text: #1a1a1a;
  --white: #ffffff;
}

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

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--light-grey);
  color: var(--text);
  min-height: 100vh;
}

/* ── Header ── */
header {
  background: var(--maroon);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 2px 8px rgba(136,28,60,0.3);
}

/* UMass wordmark using pure CSS — no image needed */
header::before {
  content: 'UMass';
  font-family: 'Libre Baskerville', serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  background: var(--maroon-dark);
  padding: 4px 10px;
  border-radius: 3px;
  letter-spacing: 0.05em;
  border: 1px solid rgba(255,255,255,0.2);
  flex-shrink: 0;
}

header h2 {
  font-family: 'Libre Baskerville', serif;
  font-size: 1.1rem;
  font-weight: 400;
  color: rgba(255,255,255,0.9);
  letter-spacing: 0.03em;
}

/* ── Page content ── */
.page-content {
  max-width: 760px;
  margin: 0 auto;
  padding: 36px 28px 80px;
}

body > p,
body > br {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 28px;
  padding-right: 28px;
}

body > p {
  color: var(--grey);
  font-size: 0.9rem;
  margin-top: 28px;
  line-height: 1.6;
}

body > p:first-of-type {
  margin-top: 32px;
}

body > p em {
  font-style: italic;
  font-size: 0.82rem;
}

/* ── Button area ── */
#ButtonArea {
  max-width: 760px;
  margin: 20px auto 0;
  padding: 0 28px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

/* ── Buttons ── */
button {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 9px 18px;
  border-radius: 3px;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--text);
  transition: all 0.15s ease;
}

button:hover {
  background: var(--maroon);
  color: var(--white);
  border-color: var(--maroon);
}

button:active { transform: translateY(1px); }

#AdminMode {
  font-size: 0.72rem;
  color: var(--border);
  border: none;
  background: none;
  cursor: pointer;
  margin-left: auto;
  padding: 4px 8px;
}

#AdminMode:hover {
  color: var(--grey);
  background: none;
  box-shadow: none;
}

/* ── Main area ── */
#MainArea {
  max-width: 760px;
  margin: 32px auto 0;
  padding: 0 28px;
}

/* ── Inputs ── */
input[type="text"],
input[type="email"],
input[type="password"] {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.88rem;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--white);
  color: var(--text);
  outline: none;
  width: 280px;
  transition: border-color 0.15s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus {
  border-color: var(--maroon);
}

input::placeholder { color: var(--border); }

/* ── Checklist ── */
#checkBoxDiv {
  margin-top: 20px;
  background: var(--white);
  border: 1px solid var(--border);
  border-top: 3px solid var(--maroon);
  border-radius: 3px;
  padding: 20px;
}

#checkBoxDiv div {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--light-grey);
}

#checkBoxDiv div:last-of-type { border-bottom: none; }

input[type="checkbox"] {
  appearance: none;
  width: 16px; height: 16px; min-width: 16px;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--white);
  cursor: pointer;
  position: relative;
  transition: all 0.15s ease;
}

input[type="checkbox"]:checked {
  background: var(--maroon);
  border-color: var(--maroon);
}

input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 10px;
  color: white;
}

label {
  font-size: 0.88rem;
  color: var(--grey);
  cursor: pointer;
  line-height: 1.4;
}

/* ── Results ── */
#prereqResult,
#AddResult,
#ContribResult,
#UpdateConfirm {
  font-size: 0.88rem;
  margin-top: 12px;
  color: var(--grey);
  min-height: 20px;
}

/* ── Hints and previews ── */
#ContribCourseHint,
#ContribPrereqHint,
#prereqPreview,
#ContribPreview,
#UpdatePreview {
  font-size: 0.78rem;
  color: var(--grey);
  margin-top: 4px;
  min-height: 18px;
}

/* ── Spacing ── */
#MainArea br { display: block; margin-bottom: 10px; content: ''; }
#MainArea p  { color: var(--grey); font-size: 0.88rem; margin-top: 8px; }

/* ── Admin popup ── */
#adminPopup {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.45);
  z-index: 999;
  align-items: center;
  justify-content: center;
}

#adminPopup.active { display: flex; }

#adminPopup > div {
  background: var(--white);
  padding: 32px;
  border-radius: 3px;
  border-top: 3px solid var(--maroon);
  max-width: 340px;
  width: 100%;
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}

#adminPopup h3 {
  font-family: 'Libre Baskerville', serif;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 16px;
  color: var(--text);
}

#adminPopup input {
  display: block;
  width: 100%;
  margin-bottom: 10px;
}

#adminPopup button {
  margin-right: 8px;
  margin-top: 4px;
}

#popupError {
  font-size: 0.8rem;
  color: #c0392b;
  margin-top: 8px;
  min-height: 18px;
}

/* ── Responsive ── */
@media (max-width: 500px) {
  header { padding: 12px 18px; }
  #ButtonArea { flex-direction: column; padding: 0 18px; }
  #ButtonArea button { width: 100%; }
  #MainArea { padding: 0 18px; }
  input[type="text"],
  input[type="email"],
  input[type="password"] { width: 100%; }
}