/* ── Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,wght@0,400;0,600;0,700;1,400&family=Source+Sans+3:wght@300;400;500;600&display=swap');

:root {
  --accent: #1a5276;
  --accent-light: #2980b9;
  --text-main: #2c3e50;
  --text-muted: #5d6d7e;
  --bg-subtle: #f8f9fa;
  --border-light: #e5e8eb;
}

body {
  font-family: 'Source Sans 3', sans-serif;
  color: var(--text-main);
  font-weight: 400;
  line-height: 1.7;
}

h1, h2, h3, h4 {
  font-family: 'Source Serif 4', serif;
  font-weight: 600;
  color: var(--accent);
}

h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.3rem;
  border-bottom: 2px solid var(--border-light);
}

/* ── Homepage profile layout ── */
.profile-grid {
  max-width: 960px;
  margin: 3rem auto;
  padding: 0 1.5rem;
  gap: 3rem;
}

.profile-sidebar {
  text-align: left;
  padding-top: 0.5rem;
}

.profile-sidebar h3 {
  margin-top: 1rem;
  margin-bottom: 0.2rem;
  font-size: 1.5rem;
}

.profile-sidebar p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.profile-main {
  max-width: 620px;
}

.profile-main h2 {
  font-size: 1.3rem;
  margin-top: 0;
}

/* ── Paper cards ── */
.paper {
  padding: 1.2rem 1.5rem;
  margin-bottom: 1.5rem;
  background: var(--bg-subtle);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
}

.paper h3 {
  font-size: 1.1rem;
  margin-top: 0;
  margin-bottom: 0.3rem;
  color: var(--text-main);
}

.paper p {
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* ── Course cards ── */
.course {
  padding: 1rem 1.5rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border-light);
  border-radius: 6px;
}

.course h4 {
  margin-top: 0;
  margin-bottom: 0.3rem;
  font-size: 1.05rem;
  color: var(--accent);
}

/* ── Buttons ── */
.btn-primary {
  background-color: var(--accent) !important;
  border-color: var(--accent) !important;
}

.btn-primary:hover {
  background-color: var(--accent-light) !important;
  border-color: var(--accent-light) !important;
}

.btn-outline-primary {
  color: var(--accent) !important;
  border-color: var(--accent) !important;
}

.btn-outline-primary:hover {
  background-color: var(--accent) !important;
  color: white !important;
}

/* ── Navbar ── */
.navbar {
  font-family: 'Source Sans 3', sans-serif;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* ── Footer ── */
.nav-footer {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .profile-grid {
    gap: 1.5rem;
  }
}