/* =========================================================================
   BUSI 2305 — Course Site
   Shared styles for every page
   ========================================================================= */

:root {
  --ink: #1a1a1a;
  --ink-soft: #2d2d2d;
  --paper: #fafaf7;
  --paper-warm: #f5f3ed;
  --rule: #d4d0c4;
  --rule-soft: #e8e4d8;
  --muted: #6b6557;
  --muted-soft: #908a7c;
  --accent: #8b3a1f;
  --accent-soft: #f0e3dc;
  --highlight: #f4ecd8;
  --ok: #3d6e3d;
  --serif: 'Fraunces', 'Iowan Old Style', 'Charter', Georgia, serif;
  --sans: 'Source Sans 3', -apple-system, system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
  --max: 1080px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* === TOPBAR ============================================================= */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 250, 247, 0.95);
  border-bottom: 1px solid var(--rule);
  backdrop-filter: blur(8px);
}
.topbar-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.crest {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}
.crest .num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.05em;
}
nav.primary { display: flex; gap: 2px; align-items: center; }
nav.primary a {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
  font-weight: 500;
}
nav.primary a:hover { color: var(--ink); background: var(--paper-warm); }
nav.primary a.active { color: var(--accent); background: var(--accent-soft); }

/* === HERO =============================================================== */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 72px 32px 56px;
  border-bottom: 1px solid var(--rule);
  position: relative;
  width: 100%;
}
.hero::before {
  content: "";
  position: absolute;
  top: 0; left: 32px;
  width: 48px;
  height: 4px;
  background: var(--accent);
}
.hero .eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 20px;
  font-weight: 500;
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(38px, 5.5vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 20px;
  max-width: 800px;
}
.hero h1 em {
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}
.hero .lede {
  font-size: 20px;
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: 680px;
  font-weight: 400;
}

/* === META STRIP ========================================================== */
.meta-strip {
  background: var(--paper-warm);
  border-bottom: 1px solid var(--rule);
  width: 100%;
}
.meta-strip-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 20px 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 20px;
}
.meta-item .label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}
.meta-item .val {
  font-size: 15px;
  color: var(--ink);
  font-weight: 500;
  line-height: 1.4;
}

/* === PAGE MAIN ========================================================== */
main {
  flex: 1;
  width: 100%;
}
section.page {
  max-width: var(--max);
  margin: 0 auto;
  padding: 64px 32px 24px;
  width: 100%;
}
.section-head { margin-bottom: 40px; }
.section-head .num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 10px;
  text-transform: uppercase;
  font-weight: 500;
}
.section-head h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin-bottom: 14px;
}
.section-head .sub {
  font-size: 16px;
  color: var(--muted);
  max-width: 640px;
  line-height: 1.55;
}

/* === PROSE ============================================================== */
.prose { max-width: 720px; }
.prose p { margin-bottom: 16px; color: var(--ink-soft); font-size: 16px; line-height: 1.7; }
.prose h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 23px;
  color: var(--ink);
  margin-top: 36px;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}
.prose h3:first-child { margin-top: 0; }
.prose h4 {
  font-weight: 600;
  font-size: 16px;
  color: var(--ink);
  margin-top: 24px;
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}
.prose ul, .prose ol { margin: 14px 0 20px 20px; color: var(--ink-soft); }
.prose li { margin-bottom: 8px; line-height: 1.6; }
.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.prose strong { color: var(--ink); font-weight: 600; }

.placeholder-note {
  background: var(--highlight);
  border-left: 3px solid var(--accent);
  padding: 16px 20px;
  border-radius: 0 4px 4px 0;
  margin: 20px 0;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.55;
}
.placeholder-note strong {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
}

/* === SYLLABUS (policy content) ========================================== */
.policy-block {
  margin: 32px 0;
  padding-top: 32px;
  border-top: 1px solid var(--rule-soft);
}
.policy-block:first-of-type { border-top: none; padding-top: 0; }
.policy-block h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  color: var(--ink);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}
.policy-block h4 {
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
  margin-top: 20px;
  margin-bottom: 6px;
}
.policy-block p { margin-bottom: 12px; font-size: 15px; line-height: 1.65; color: var(--ink-soft); }
.policy-block ul, .policy-block ol { margin: 10px 0 16px 20px; font-size: 15px; }
.policy-block li { margin-bottom: 6px; line-height: 1.55; color: var(--ink-soft); }

.grade-table {
  display: grid;
  grid-template-columns: 1fr auto;
  max-width: 400px;
  margin: 16px 0 24px;
  font-family: var(--mono);
  font-size: 14px;
}
.grade-table .row {
  display: contents;
}
.grade-table .row > span {
  padding: 10px 16px;
  border-bottom: 1px solid var(--rule-soft);
  color: var(--ink-soft);
}
.grade-table .row > span:last-child {
  text-align: right;
  color: var(--ink);
  font-weight: 500;
}
.grade-table .row.total > span {
  border-bottom: none;
  border-top: 2px solid var(--ink);
  color: var(--ink);
  font-weight: 600;
}

.scale-table {
  font-family: var(--mono);
  font-size: 14px;
  margin: 12px 0 24px;
  display: inline-block;
  min-width: 240px;
}
.scale-table > div {
  display: grid;
  grid-template-columns: 1fr auto;
  padding: 8px 0;
  border-bottom: 1px solid var(--rule-soft);
  color: var(--ink-soft);
}
.scale-table > div:last-child { border-bottom: none; }
.scale-table > div > span:last-child { text-align: right; color: var(--ink); }

/* === SCHEDULE ========================================================== */
.schedule { border-top: 1px solid var(--rule); }
.week {
  display: grid;
  grid-template-columns: 90px 1fr 220px;
  gap: 32px;
  padding: 24px 0;
  border-bottom: 1px solid var(--rule-soft);
  align-items: baseline;
}
.week .wk {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}
.week .wk-title {
  font-family: var(--serif);
  font-size: 19px;
  color: var(--ink);
  font-weight: 500;
  line-height: 1.3;
}
.week .wk-title .topic {
  display: block;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--muted);
  margin-top: 4px;
  font-weight: 400;
}
.week .wk-due {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  text-align: right;
  line-height: 1.5;
}
.week .wk-due .pill {
  display: inline-block;
  padding: 3px 10px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 3px;
  font-size: 11px;
  font-weight: 500;
}
.week .wk-due .pill.exam {
  background: var(--ink);
  color: var(--highlight);
}

/* === LECTURES — TOGGLE VIEW ============================================= */
.lectures-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--rule);
  flex-wrap: wrap;
  gap: 16px;
}
.lectures-controls .count {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.view-toggle {
  display: inline-flex;
  border: 1px solid var(--rule);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper-warm);
}
.view-toggle button {
  background: transparent;
  border: none;
  padding: 8px 16px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  gap: 6px;
}
.view-toggle button:not(:last-child) { border-right: 1px solid var(--rule); }
.view-toggle button.active {
  background: var(--ink);
  color: var(--paper);
}
.view-toggle button:hover:not(.active) { color: var(--ink); }
.view-toggle button svg { width: 14px; height: 14px; }

/* — GRID view — */
.lectures.view-grid .week-group {
  margin-bottom: 48px;
}
.lectures.view-grid .week-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule-soft);
}
.lectures.view-grid .week-header .wk {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}
.lectures.view-grid .week-header .wk-title {
  font-family: var(--serif);
  font-size: 22px;
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -0.01em;
}
.lectures.view-grid .video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.lectures.view-grid .video-card {
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  border-radius: 6px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.15s;
  text-decoration: none;
  color: inherit;
  display: block;
  cursor: pointer;
}
.lectures.view-grid .video-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  border-color: var(--accent);
}
.video-thumb {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #2d2d2d 0%, #4a3525 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.video-thumb::after {
  content: "▶";
  position: absolute;
  color: rgba(255,255,255,0.85);
  font-size: 28px;
  z-index: 2;
}
.video-thumb .lbl {
  position: absolute;
  bottom: 10px;
  left: 12px;
  color: rgba(255,255,255,0.7);
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  z-index: 2;
}
.video-thumb.type-excel { background: linear-gradient(135deg, #2d4a2d 0%, #1f3d1f 100%); }
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0; left: 0;
  opacity: 0.85;
}
.video-meta { padding: 14px 16px; }
.video-meta .tag {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
  font-weight: 500;
}
.video-meta .tag.excel { color: var(--ok); }
.video-meta .ttl {
  font-family: var(--serif);
  font-size: 16px;
  color: var(--ink);
  font-weight: 500;
  line-height: 1.3;
  margin-bottom: 6px;
}
.video-meta .dur {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}

/* — LIST view (file-explorer detail) — */
.lectures.view-list .video-grid,
.lectures.view-list .week-header {
  display: none;
}
.lectures.view-list .lecture-table {
  display: table;
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.lectures.view-grid .lecture-table { display: none; }
.lecture-table thead tr {
  border-bottom: 1px solid var(--rule);
}
.lecture-table th {
  text-align: left;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 12px 16px 12px 0;
  font-weight: 500;
}
.lecture-table th:first-child { padding-left: 12px; }
.lecture-table tbody tr {
  border-bottom: 1px solid var(--rule-soft);
  transition: background 0.1s;
  cursor: pointer;
}
.lecture-table tbody tr:hover { background: var(--paper-warm); }
.lecture-table td {
  padding: 12px 16px 12px 0;
  color: var(--ink-soft);
  vertical-align: middle;
}
.lecture-table td:first-child { padding-left: 12px; }
.lecture-table td.name {
  font-weight: 500;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
}
.lecture-table td.name .icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
.lecture-table td.wk-cell {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.lecture-table td.type {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.lecture-table td.type.excel { color: var(--ok); }
.lecture-table td.dur {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  text-align: right;
}

/* === CONTACT ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  margin-top: 40px;
}
.contact-card {
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 28px;
}
.contact-card .lbl {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}
.contact-card .val {
  font-family: var(--serif);
  font-size: 24px;
  color: var(--ink);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
  word-wrap: break-word;
}
.contact-card .val:last-child { margin-bottom: 0; }
.contact-card .val a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule-soft);
  transition: border-color 0.15s;
}
.contact-card .val a:hover { border-color: var(--accent); color: var(--accent); }
.contact-card .val .note {
  display: block;
  font-family: var(--sans);
  font-size: 13px;
  color: var(--muted);
  font-style: italic;
  margin-top: 4px;
  font-weight: 400;
}

/* === RESOURCES ========================================================== */
.res-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.res-card {
  border: 1px solid var(--rule);
  padding: 22px;
  border-radius: 6px;
  background: var(--paper);
  transition: border-color 0.15s, transform 0.15s;
  text-decoration: none;
  color: inherit;
  display: block;
}
.res-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}
.res-card .cat {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
  font-weight: 500;
}
.res-card h4 {
  font-family: var(--serif);
  font-size: 17px;
  color: var(--ink);
  font-weight: 500;
  margin-bottom: 6px;
  line-height: 1.3;
}
.res-card p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.crisis-box {
  background: var(--ink);
  color: var(--highlight);
  padding: 32px;
  border-radius: 8px;
  margin: 32px 0;
}
.crisis-box h3 {
  font-family: var(--serif);
  font-size: 22px;
  color: var(--highlight);
  margin-bottom: 12px;
  font-weight: 500;
}
.crisis-box p {
  color: rgba(244,236,216,0.8);
  font-size: 14px;
  margin-bottom: 20px;
  line-height: 1.6;
}
.crisis-box .crisis-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.crisis-box .crisis-list li {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid rgba(244,236,216,0.15);
  font-size: 14px;
  gap: 16px;
}
.crisis-box .crisis-list li:last-child { border-bottom: none; }
.crisis-box .crisis-list .name { color: rgba(244,236,216,0.85); }
.crisis-box .crisis-list .num {
  font-family: var(--mono);
  color: var(--highlight);
  font-weight: 500;
  white-space: nowrap;
}
.crisis-box .crisis-emergency {
  background: var(--accent);
  padding: 14px 18px;
  border-radius: 4px;
  margin-bottom: 20px;
  font-size: 14px;
  color: #fff;
}
.crisis-box .crisis-emergency strong { display: block; margin-bottom: 4px; }

/* === LANDING (INDEX) ==================================================== */
.path-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin: 40px 0;
}
.path-card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 28px;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.path-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.04);
}
.path-card .num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
}
.path-card h3 {
  font-family: var(--serif);
  font-size: 22px;
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin-top: 4px;
}
.path-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
  margin-top: 6px;
}
.path-card .arrow {
  margin-top: auto;
  padding-top: 16px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
}
.path-card .arrow::after { content: " →"; transition: transform 0.15s; }
.path-card:hover .arrow::after { margin-left: 4px; }

/* === FOOTER ============================================================ */
footer {
  max-width: var(--max);
  margin: 56px auto 0;
  padding: 32px;
  border-top: 1px solid var(--rule);
  width: 100%;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  font-size: 14px;
  color: var(--muted);
}
footer .col h5 {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
  font-weight: 600;
}
footer a { color: var(--ink-soft); text-decoration: none; display: block; padding: 3px 0; }
footer a:hover { color: var(--accent); }
footer .institutional {
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}
footer .institutional a { display: inline; color: var(--accent); }

/* === VIDEO MODAL ======================================================== */
.video-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 40px;
}
.video-modal.open { display: flex; }
.video-modal-inner {
  width: 100%;
  max-width: 1100px;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
}
.video-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(0,0,0,0.6);
  color: white;
  border: none;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  font-size: 20px;
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
}
.video-modal-close:hover { background: rgba(0,0,0,0.9); }
.video-modal-iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: none;
}

/* === RESPONSIVE ======================================================== */
@media (max-width: 720px) {
  .topbar-inner { padding: 12px 20px; gap: 12px; flex-wrap: wrap; }
  nav.primary { flex-wrap: wrap; gap: 0; order: 3; width: 100%; justify-content: flex-start; }
  nav.primary a { padding: 6px 10px; font-size: 13px; }
  .hero { padding: 48px 20px 32px; }
  .hero::before { left: 20px; }
  section.page { padding: 48px 20px 24px; }
  .week { grid-template-columns: 70px 1fr; gap: 16px; }
  .week .wk-due { grid-column: 2; text-align: left; }
  .contact-grid { grid-template-columns: 1fr; gap: 24px; }
  footer { grid-template-columns: 1fr; gap: 24px; padding: 24px 20px; }
  .lectures-controls { flex-direction: column; align-items: flex-start; }
  .meta-strip-inner { padding: 16px 20px; }
}