/* ============================================================
   Meridian State University — Dept. of Data Science
   Design tokens
   ============================================================ */
:root {
  --navy: #1F3864;
  --navy-deep: #14243F;
  --gold: #B08D57;
  --gold-light: #D9C4A0;
  --lightblue: #DCE6F1;
  --paper: #FBFAF7;
  --panel: #FFFFFF;
  --line: #DDE1E7;
  --text: #1E2430;
  --text-muted: #5B6472;
  --success: #3F7A57;

  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --radius: 3px;
  --shadow-sm: 0 1px 2px rgba(20, 36, 63, 0.06);
  --shadow-md: 0 6px 20px rgba(20, 36, 63, 0.10);
  --maxw: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--navy);
  line-height: 1.2;
  margin: 0 0 .5em;
  font-weight: 600;
}
h1 { font-size: clamp(2rem, 4vw, 2.9rem); letter-spacing: -0.01em; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.2rem; }

p { margin: 0 0 1em; color: var(--text); }
a { color: var(--navy); }
a:hover { color: var(--gold); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ---------- Skip link (a11y) ---------- */
.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--navy); color: #fff; padding: 10px 16px;
  z-index: 200; border-radius: 0 0 4px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Top identity strip ---------- */
.id-strip { height: 6px; background: linear-gradient(90deg, var(--navy) 0%, var(--navy) 70%, var(--gold) 100%); }

/* ---------- Header ---------- */
.site-header {
  background: var(--navy);
  color: #fff;
  border-bottom: 3px solid var(--gold);
}
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0 14px;
  gap: 20px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: #fff;
}
.brand-mark {
  width: 44px; height: 44px;
  border: 1.5px solid var(--gold-light);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--gold-light);
  flex: none;
}
.brand-text .uni { font-family: var(--serif); font-weight: 600; font-size: 1.15rem; letter-spacing: .01em; }
.brand-text .dept { font-size: .8rem; color: var(--lightblue); letter-spacing: .04em; text-transform: uppercase; }

.faculty-card {
  display: flex; align-items: center; gap: 12px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius);
  padding: 8px 16px;
  font-size: .86rem;
}
.faculty-card .avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--gold);
  color: var(--navy-deep);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-weight: 700; font-size: .82rem;
  flex: none;
}
.faculty-card .fname { font-weight: 600; color: #fff; }
.faculty-card .frole { color: var(--lightblue); font-size: .78rem; }
.faculty-card a { color: var(--gold-light); text-decoration: none; }
.faculty-card a:hover { text-decoration: underline; }

nav.main-nav {
  border-top: 1px solid rgba(255,255,255,.14);
}
nav.main-nav ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; gap: 2px; flex-wrap: wrap;
}
nav.main-nav a {
  display: block;
  color: rgba(255,255,255,.82);
  text-decoration: none;
  font-size: .86rem;
  letter-spacing: .03em;
  text-transform: uppercase;
  padding: 12px 16px;
  border-bottom: 3px solid transparent;
  transition: color .15s, border-color .15s, background .15s;
}
nav.main-nav a:hover { color: #fff; background: rgba(255,255,255,.06); }
nav.main-nav a.active { color: #fff; border-bottom-color: var(--gold); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: #fff;
  padding: 56px 0 64px;
}
.hero .eyebrow {
  font-size: .78rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--gold-light); margin-bottom: 14px; font-weight: 600;
}
.hero h1 { color: #fff; max-width: 720px; }
.hero p.lead { color: rgba(255,255,255,.78); max-width: 600px; font-size: 1.05rem; }
.hero-actions { display: flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius);
  font-size: .88rem; font-weight: 600;
  text-decoration: none;
  letter-spacing: .02em;
  border: 1.5px solid transparent;
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-gold { background: var(--gold); color: var(--navy-deep); }
.btn-gold:hover { background: var(--gold-light); color: var(--navy-deep); }
.btn-outline { border-color: rgba(255,255,255,.4); color: #fff; }
.btn-outline:hover { border-color: #fff; color: #fff; }
.btn-navy { background: var(--navy); color: #fff; }
.btn-navy:hover { background: var(--navy-deep); color: #fff; }

/* ---------- Stat strip ---------- */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: -34px;
  position: relative;
  z-index: 5;
  box-shadow: var(--shadow-md);
}
.stat {
  background: var(--panel);
  padding: 20px 22px;
  text-align: left;
}
.stat .num { font-family: var(--serif); font-size: 1.9rem; color: var(--navy); font-weight: 600; }
.stat .label { font-size: .76rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; margin-top: 2px; }

/* ---------- Sections ---------- */
main { padding-bottom: 60px; }
.section { padding: 56px 0; }
.section-head { margin-bottom: 30px; max-width: 680px; }
.section-head .eyebrow {
  font-size: .76rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--gold); font-weight: 700; margin-bottom: 8px;
}
.section-head p { color: var(--text-muted); }
.divider { border: none; border-top: 1px solid var(--line); margin: 0; }

/* ---------- Course cards ---------- */
.course-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
@media (max-width: 760px) { .course-grid { grid-template-columns: 1fr; } }

.course-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  text-decoration: none;
  color: var(--text);
  display: flex; flex-direction: column;
  transition: box-shadow .15s ease, border-color .15s ease;
}
.course-card:hover { box-shadow: var(--shadow-md); border-color: var(--gold); }
.course-card .code {
  font-family: var(--mono); font-size: .74rem; color: var(--gold);
  letter-spacing: .06em; margin-bottom: 10px; font-weight: 600;
}
.course-card h3 { margin-bottom: 8px; }
.course-card .meta { font-size: .8rem; color: var(--text-muted); margin-bottom: 16px; }
.course-card .meta span:not(:last-child)::after { content: "•"; margin: 0 8px; color: var(--line); }

/* hour-distribution ledger bar — signature element */
.ledger { margin-top: auto; }
.ledger-bar {
  display: flex; height: 8px; border-radius: 2px; overflow: hidden;
  background: var(--line); margin-bottom: 8px;
}
.ledger-bar span { display: block; height: 100%; }
.ledger-caption {
  font-size: .72rem; color: var(--text-muted);
  display: flex; justify-content: space-between;
}

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table.data {
  width: 100%; border-collapse: collapse; font-size: .88rem; background: var(--panel);
}
table.data th {
  background: var(--navy); color: #fff;
  text-align: left; font-weight: 600;
  padding: 11px 14px; font-size: .78rem;
  letter-spacing: .03em; text-transform: uppercase;
  white-space: nowrap;
}
table.data td {
  padding: 10px 14px; border-top: 1px solid var(--line); vertical-align: top;
}
table.data tr:nth-child(even) td { background: #F7F8FA; }
table.data td.num, table.data th.num { text-align: center; white-space: nowrap; }
table.data tr.total td { background: var(--lightblue); font-weight: 700; color: var(--navy); }

/* ---------- Timetable ---------- */
.timetable-wrap { overflow-x: auto; }
table.timetable { width: 100%; border-collapse: collapse; min-width: 760px; }
table.timetable th, table.timetable td {
  border: 1px solid var(--line); padding: 10px; text-align: center; font-size: .82rem;
}
table.timetable thead th { background: var(--navy); color: #fff; font-size: .76rem; letter-spacing: .03em; }
table.timetable thead th .time { display:block; font-weight: 400; color: var(--lightblue); font-size: .7rem; margin-top: 2px; }
table.timetable td.day-label { background: var(--lightblue); color: var(--navy); font-weight: 700; text-align: left; }
table.timetable td.slot { color: var(--text-muted); }
table.timetable td.slot .sc { display:block; font-weight: 600; color: var(--text); font-family: var(--mono); font-size: .76rem; }
table.timetable td.brk { background: #FBF3E3; color: #8A6D3B; font-style: italic; font-weight: 600; }
table.timetable tbody tr:nth-child(odd) td.slot { background: #FAFBFC; }

/* ---------- Cards / panels ---------- */
.panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px;
}
.two-col { display: grid; grid-template-columns: 2fr 1fr; gap: 24px; align-items: start; }
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }

.info-list { list-style: none; margin: 0; padding: 0; }
.info-list li {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 10px 0; border-top: 1px solid var(--line); font-size: .88rem;
}
.info-list li:first-child { border-top: none; }
.info-list .k { color: var(--text-muted); }
.info-list .v { text-align: right; font-weight: 600; }

ul.bullets { padding-left: 1.15em; margin: 0 0 1em; }
ul.bullets li { margin-bottom: 8px; }

.tag {
  display: inline-block; font-size: .72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .04em;
  background: var(--lightblue); color: var(--navy);
  padding: 3px 10px; border-radius: 20px;
}

/* ---------- Resource link cards ---------- */
.resource-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 900px) { .resource-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .resource-grid { grid-template-columns: 1fr; } }
.resource-card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 18px;
  text-decoration: none; color: var(--text); background: var(--panel);
  display: flex; flex-direction: column; gap: 6px;
  transition: border-color .15s, box-shadow .15s;
}
.resource-card:hover { border-color: var(--gold); box-shadow: var(--shadow-sm); }
.resource-card .rc-type { font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; color: var(--gold); font-weight: 700; }
.resource-card .rc-title { font-family: var(--serif); font-weight: 600; color: var(--navy); font-size: 1rem; }
.resource-card .rc-desc { font-size: .82rem; color: var(--text-muted); }

.placeholder-note {
  background: #FBF3E3; border: 1px solid var(--gold-light); border-radius: var(--radius);
  padding: 14px 18px; font-size: .84rem; color: #6B5730; margin-bottom: 26px;
}
.placeholder-note strong { color: #5A4726; }

/* ---------- Breadcrumb ---------- */
.crumb { font-size: .8rem; color: var(--text-muted); margin-bottom: 18px; }
.crumb a { color: var(--text-muted); text-decoration: none; }
.crumb a:hover { color: var(--navy); }

/* ---------- Footer ---------- */
footer.site-footer {
  background: var(--navy-deep); color: rgba(255,255,255,.7);
  padding: 40px 0 28px; font-size: .84rem; margin-top: 40px;
}
footer.site-footer .foot-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; margin-bottom: 28px;
}
@media (max-width: 700px) { footer.site-footer .foot-grid { grid-template-columns: 1fr; } }
footer.site-footer h4 { color: #fff; font-size: .82rem; text-transform: uppercase; letter-spacing: .05em; font-family: var(--sans); }
footer.site-footer ul { list-style: none; padding: 0; margin: 0; }
footer.site-footer li { margin-bottom: 8px; }
footer.site-footer a { color: rgba(255,255,255,.7); text-decoration: none; }
footer.site-footer a:hover { color: var(--gold-light); }
footer.site-footer .foot-bottom {
  border-top: 1px solid rgba(255,255,255,.12); padding-top: 18px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}

/* ---------- Utility ---------- */
.mt-0 { margin-top: 0; }
.small { font-size: .82rem; color: var(--text-muted); }
.center { text-align: center; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}