/* CSCE 631-D Fall 2026. Loaded after the site's Bootstrap 4 stylesheet. */
:root {
  --tamu-maroon: #500000;
  --tamu-maroon-dark: #320000;
  --tamu-maroon-light: #6f1d1b;
  --tamu-gold: #d6a84a;
  --ink: #25313b;
  --muted: #5e6872;
  --surface: #f7f8fa;
  --border: #dce1e6;
}

body.course-site {
  min-height: 100vh;
  padding-top: 4.75rem;
  font-family: "Open Sans", "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: var(--surface);
  line-height: 1.65;
}

.course-site h1, .course-site h2, .course-site h3, .course-site h4,
.course-site .navbar-brand {
  font-family: Merriweather, Georgia, serif;
}

.course-site a { color: var(--tamu-maroon); }
.course-site a:hover, .course-site a:focus { color: var(--tamu-maroon-light); }
.course-navbar { background: var(--tamu-maroon) !important; box-shadow: 0 2px 6px rgba(0, 0, 0, .18); }
.course-navbar .navbar-brand, .course-navbar .nav-link { color: #fff !important; }
.course-navbar .nav-link { font-family: "Open Sans", "Segoe UI", Arial, sans-serif; }
.course-navbar .nav-link:hover, .course-navbar .nav-link:focus { color: #f5d9a6 !important; }

.skip-link { position: absolute; left: -10000px; top: auto; width: 1px; height: 1px; overflow: hidden; }
.skip-link:focus { left: 1rem; top: 1rem; width: auto; height: auto; padding: .6rem .9rem; color: #fff; background: #111; z-index: 1100; }
.course-hero { color: #fff; background: linear-gradient(130deg, var(--tamu-maroon-dark), var(--tamu-maroon), var(--tamu-maroon-light)); padding: 3.2rem 2.4rem; margin-bottom: 2rem; border-radius: .3rem; }
.course-hero h1 { font-size: clamp(2rem, 5vw, 3.15rem); margin-bottom: .55rem; }
.course-hero .lead { font-size: 1.25rem; margin-bottom: .35rem; }
.course-hero .meta { color: #f4e6c7; margin-bottom: 0; }
.page-header { background: #fff; border-left: .4rem solid var(--tamu-maroon); padding: 1.7rem 2rem; margin: 0 0 1.7rem; box-shadow: 0 1px 3px rgba(0,0,0,.05); }
.page-header h1 { color: var(--tamu-maroon); margin: 0 0 .45rem; }
.module-kicker, .eyebrow { font-size: .84rem; font-weight: 700; color: var(--tamu-maroon); letter-spacing: .06em; text-transform: uppercase; }
.content-card, .module-card, .lecture-item, .quick-links { background: #fff; border: 1px solid var(--border); border-radius: .35rem; }
.content-card { padding: 1.5rem; margin-bottom: 1.4rem; }
.content-card h2 { color: var(--tamu-maroon); font-size: 1.55rem; }
.quick-links { padding: 1.25rem; margin-bottom: 1.8rem; }
.quick-links a { margin: .25rem .3rem .25rem 0; }
.btn-course { color: #fff !important; background: var(--tamu-maroon); border-color: var(--tamu-maroon); }
.btn-course:hover, .btn-course:focus { color: #fff !important; background: var(--tamu-maroon-light); border-color: var(--tamu-maroon-light); }
.btn-outline-course { color: var(--tamu-maroon); background: #fff; border-color: var(--tamu-maroon); }
.btn-outline-course:hover, .btn-outline-course:focus { color: #fff; background: var(--tamu-maroon); }
.module-card { display: flex; flex-direction: column; height: 100%; padding: 1.35rem; border-top: .3rem solid var(--tamu-maroon); transition: box-shadow .15s ease, transform .15s ease; }
.module-card:hover { box-shadow: 0 5px 16px rgba(44, 55, 65, .12); transform: translateY(-2px); }
.module-card h2 { font-size: 1.3rem; color: var(--tamu-maroon); }
.module-card p { color: var(--muted); }
.module-card .btn { margin-top: auto; align-self: flex-start; }
.lecture-list { list-style: none; padding: 0; margin: 0; }
.lecture-item { display: flex; align-items: flex-start; justify-content: space-between; gap: 1.25rem; padding: 1.15rem 1.25rem; margin-bottom: .85rem; }
.lecture-item h3 { font-family: "Open Sans", "Segoe UI", Arial, sans-serif; font-size: 1.07rem; margin-bottom: .25rem; }
.lecture-item p { color: var(--muted); margin: 0; }
.lecture-links { flex: 0 0 auto; min-width: 12rem; text-align: right; }
.lecture-links .btn { margin: .1rem 0 .1rem .25rem; }
.forthcoming { color: var(--muted); font-size: .9rem; font-style: italic; }
.assessment { padding: 1rem 1.2rem; background: #fdf8ef; border-left: .3rem solid var(--tamu-gold); }
.assessment strong { color: var(--tamu-maroon); }
.module-pager { display: flex; justify-content: space-between; gap: 1rem; margin: 2rem 0; }
.course-footer { border-top: 1px solid var(--border); color: var(--muted); font-size: .9rem; padding: 1.5rem 0 2rem; }
.course-site table td, .course-site table th { vertical-align: middle; }
.course-site .table thead th { color: #fff; background: var(--tamu-maroon); border-color: var(--tamu-maroon); }

@media (max-width: 767.98px) {
  body.course-site { padding-top: 4.4rem; }
  .course-hero { padding: 2.2rem 1.35rem; }
  .page-header { padding: 1.35rem; }
  .lecture-item { display: block; }
  .lecture-links { text-align: left; margin-top: .8rem; }
  .lecture-links .btn { margin-left: 0; margin-right: .25rem; }
}