/* Siebel School / Illinois colors */
:root {
  --illinois-orange: #E84A27;
  --illinois-blue: #13294B;
  --illinois-blue-light: #1D3D70;
  --bg: #F8F8F8;
  --panel: #FFFFFF;
  --border: #DDDDDD;
  --text: #222222;
  --muted: #666666;
  --accent: #FF6B3D;
  --good: #1F7A3A;
  --warn: #B8860B;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
}

.topbar {
  background: var(--illinois-blue);
  color: #fff;
  padding: 0;
  border-bottom: 4px solid var(--illinois-orange);
}
.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  padding: 14px 20px;
  gap: 20px;
}
.brand {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.3px;
}
.brand .block-i {
  display: inline-block;
  background: var(--illinois-orange);
  color: white;
  padding: 2px 8px;
  margin-right: 8px;
  font-family: Georgia, serif;
  font-weight: 900;
  border-radius: 2px;
}
.topnav {
  display: flex;
  gap: 18px;
  flex: 1;
}
.topnav a {
  color: #fff;
  text-decoration: none;
  font-size: 14px;
  opacity: 0.9;
}
.topnav a:hover { opacity: 1; text-decoration: underline; }
.topnav a.active { font-weight: 700; opacity: 1; border-bottom: 2px solid var(--illinois-orange); padding-bottom: 2px; }

.user-switch {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  background: var(--illinois-blue-light);
  padding: 6px 10px;
  border-radius: 4px;
}
.user-switch select {
  background: #fff;
  border: 1px solid var(--border);
  padding: 4px 6px;
  border-radius: 3px;
  font-size: 13px;
  min-width: 200px;
}
.user-switch .who {
  color: #fff;
  opacity: 0.85;
}

main {
  max-width: 1200px;
  margin: 24px auto;
  padding: 0 20px 60px;
}

h1 {
  font-size: 26px;
  color: var(--illinois-blue);
  margin: 0 0 6px;
  border-bottom: 2px solid var(--illinois-orange);
  padding-bottom: 8px;
}
h2 {
  font-size: 18px;
  color: var(--illinois-blue);
  margin-top: 28px;
  margin-bottom: 8px;
}
.panel > h2:first-child,
.panel > label:first-child { margin-top: 0; }
h3 { font-size: 15px; margin: 16px 0 6px; color: var(--illinois-blue); }

.instructions, .recommendations {
  background: var(--panel);
  border-left: 4px solid var(--illinois-orange);
  padding: 12px 16px;
  margin: 12px 0;
  font-size: 11pt;
}
.recommendations { border-left-color: var(--illinois-blue-light); }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 18px 22px;
  margin: 16px 0;
  border-radius: 4px;
}

label { display: block; font-weight: 600; margin: 10px 0 4px; font-size: 11pt; }
input[type=text], input[type=email], select, textarea {
  width: 100%;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 3px;
  font-size: 11pt;
  font-family: inherit;
}
textarea { min-height: 70px; resize: vertical; }
.row { display: flex; gap: 16px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 200px; }

.checkline { display: flex; align-items: center; gap: 8px; margin: 6px 0; font-weight: 400; }
.checkline input { width: auto; }

.radio-group { display: flex; flex-direction: column; gap: 4px; }
.radio-group label { font-weight: 400; display: flex; align-items: center; gap: 8px; margin: 2px 0; }
.radio-group input { width: auto; }

.btn {
  background: var(--illinois-orange);
  color: white;
  border: none;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 3px;
  cursor: pointer;
}
.btn:hover { background: #c43e1f; }
.btn.secondary {
  background: var(--illinois-blue);
}
.btn.secondary:hover { background: var(--illinois-blue-light); }
.btn.ghost {
  background: transparent;
  color: var(--illinois-blue);
  border: 1px solid var(--illinois-blue);
}

.toolbar { display: flex; gap: 8px; margin: 16px 0; flex-wrap: wrap; }

table.courses {
  width: 100%;
  border-collapse: collapse;
  font-size: 11pt;
  background: #fff;
}
table.courses th, table.courses td {
  text-align: left;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
table.courses th {
  background: var(--illinois-blue);
  color: white;
  position: sticky;
  top: 0;
  font-weight: 600;
}
table.courses tr:nth-child(even) { background: #FBFBFB; }
table.courses tr:hover { background: #FFF6F2; }

.grade-cell { display: flex; gap: 2px; }
.grade-cell label {
  font-weight: 400;
  margin: 0;
  cursor: pointer;
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: 3px;
  font-size: 11pt;
  background: #fff;
}
.grade-cell input { position: absolute; opacity: 0; width: 0; height: 0; pointer-events: none; }
.grade-cell input:checked + span { font-weight: 800; }
.grade-cell label:has(input:focus-visible) { outline: 3px solid var(--illinois-orange); outline-offset: 1px; }
.grade-cell label.g-A:has(input:checked) { background: #1F7A3A; color: #fff; border-color: #1F7A3A; }
.grade-cell label.g-B:has(input:checked) { background: #4A8BC2; color: #fff; border-color: #4A8BC2; }
.grade-cell label.g-C:has(input:checked) { background: #E0A030; color: #fff; border-color: #E0A030; }
.grade-cell label.g-F:has(input:checked) { background: #B33A2C; color: #fff; border-color: #B33A2C; }

.req-tag {
  display: inline-block;
  background: var(--illinois-orange);
  color: white;
  font-size: 11pt;
  padding: 1px 5px;
  border-radius: 2px;
  margin-left: 6px;
  vertical-align: middle;
}
.lvl-400 { color: var(--illinois-blue); font-weight: 600; }

.ordered-list {
  background: #fff;
  border: 1px dashed var(--border);
  padding: 10px;
  min-height: 60px;
  margin: 6px 0;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--illinois-blue);
  color: white;
  padding: 4px 8px;
  margin: 3px;
  border-radius: 14px;
  font-size: 11pt;
}
.chip.warn { background: #B33A2C; }
.chip .x { cursor: pointer; font-weight: bold; }
.chip .num { background: rgba(255,255,255,0.25); padding: 0 5px; border-radius: 8px; font-size: 11pt; }
.chip .mv-btn { cursor: pointer; font-size: 11pt; opacity: 0.8; padding: 0 2px; }
.chip .mv-btn:hover { opacity: 1; }
.chip .mv-dis { opacity: 0.3; cursor: default; pointer-events: none; }

@keyframes chip-flash {
  0%   { background: #f59e0b; box-shadow: 0 0 0 3px rgba(245,158,11,0.5); transform: scale(1.08); }
  70%  { background: #f59e0b; box-shadow: 0 0 0 2px rgba(245,158,11,0.2); transform: scale(1.03); }
  100% { background: var(--illinois-blue); box-shadow: none; transform: scale(1); }
}
.chip.chip-moved { animation: chip-flash 0.45s ease-out forwards; }

.form-tabs {
  display: flex;
  gap: 0;
  margin: 1.2rem 0 0;
  border-bottom: 2px solid var(--border);
}
.form-tab-btn {
  padding: 10px 26px;
  border: none;
  background: none;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  color: #666;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s, border-color 0.15s;
  border-radius: 4px 4px 0 0;
}
.form-tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.form-tab-btn:hover:not(.active) { color: var(--text); background: rgba(0,0,0,0.03); }
.tab-section { animation: tab-fade 0.18s ease-out; }
@keyframes tab-fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

.search-input { max-width: 280px; }
.filters { display: flex; gap: 12px; align-items: center; margin-bottom: 10px; flex-wrap: wrap; }
.filters label { font-weight: 400; display: flex; align-items: center; gap: 6px; margin: 0; }

.hero {
  background: linear-gradient(135deg, var(--illinois-blue) 0%, var(--illinois-blue-light) 100%);
  color: white;
  padding: 32px;
  border-radius: 4px;
  margin-bottom: 18px;
}
.hero h1 { color: white; border-bottom: none; padding-bottom: 0; }
.hero p { font-size: 15px; opacity: 0.95; max-width: 700px; }
.card-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 22px;
  border-radius: 4px;
  border-top: 4px solid var(--illinois-orange);
}
.card h2 { margin-top: 0; }
.card p { font-size: 14px; color: var(--muted); }

.banner {
  background: #FFF8E1;
  border: 1px solid #E0C060;
  padding: 10px 14px;
  border-radius: 3px;
  font-size: 11pt;
  margin: 12px 0;
}
.banner.good {
  background: #E8F5EC;
  border-color: #1F7A3A;
  color: #14512A;
}

.smart-hints {
  background: #EEF4FB;
  border-left: 3px solid var(--illinois-blue-light);
  padding: 8px 12px;
  font-size: 11pt;
  color: var(--illinois-blue);
  margin: 4px 0;
}
.smart-hints b { color: var(--illinois-orange); }

/* Combobox (typeahead-enhanced select) */
.combobox {
  position: relative;
  display: inline-block;
  vertical-align: middle;
}
.combobox.cb-block { display: block; }
.combobox-input {
  width: 100%;
  min-width: 220px;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 3px;
  font-size: 11pt;
  font-family: inherit;
  background: #fff;
}
.combobox-input:focus {
  outline: 2px solid var(--illinois-orange);
  outline-offset: -1px;
}
.combobox-popup {
  position: absolute;
  top: calc(100% + 2px);
  left: 0;
  right: 0;
  min-width: 260px;
  max-height: 320px;
  overflow-y: auto;
  background: #fff;
  border: 1px solid var(--illinois-blue);
  border-radius: 3px;
  box-shadow: 0 6px 16px rgba(0,0,0,0.18);
  z-index: 1000;
  font-size: 11pt;
}
.combobox-group {
  background: var(--illinois-blue);
  color: #fff;
  padding: 4px 10px;
  font-weight: 600;
  font-size: 11pt;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  position: sticky;
  top: 0;
}
.combobox-item {
  padding: 6px 10px;
  cursor: pointer;
  border-bottom: 1px solid #F0F0F0;
  color: #111;
}
.combobox-item:hover,
.combobox-item.active {
  background: var(--illinois-blue);
  color: #fff;
}
.combobox-item mark {
  background: #FFE08A;
  color: #111;
  padding: 0 2px;
  font-weight: 700;
  border-radius: 2px;
}
.combobox-item.active mark,
.combobox-item:hover mark {
  background: var(--illinois-orange);
  color: #fff;
}
.combobox-empty {
  padding: 8px 10px;
  color: var(--muted);
  font-style: italic;
}

/* Header combobox lives on dark blue bar — keep it readable */
.user-switch .combobox-input { min-width: 220px; }

/* Currently-editing course display */
.current-course-display {
  font-size: 15px;
  font-weight: 700;
  color: var(--illinois-blue);
  padding: 6px 0 7px;
  border-bottom: 2px solid var(--illinois-orange);
  min-height: 34px;
}

/* My Courses nav table */
table.course-nav-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11pt;
}
table.course-nav-table th {
  background: var(--illinois-blue);
  color: #fff;
  font-weight: 600;
  font-size: 11pt;
  padding: 7px 11px;
  text-align: left;
}
table.course-nav-table td {
  padding: 9px 11px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
table.course-nav-table tbody tr:last-child td { border-bottom: none; }
.cnav-row {
  cursor: pointer;
  transition: background 0.1s;
}
.cnav-row:hover td { background: #FFF3EE; }
.cnav-active td {
  background: #EEF3FA !important;
  border-left: 3px solid var(--illinois-orange);
}
.cnav-active td:not(:first-child) { border-left: none; }
.cnav-active td:first-child { border-left: 3px solid var(--illinois-orange); padding-left: 9px; }
.cnav-cid { font-weight: 700; color: var(--illinois-blue); white-space: nowrap; }
.cnav-center { text-align: center; }
.cnav-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 11pt;
  font-weight: 600;
}
.cnav-started { background: #E2F3E8; color: #1A6B32; }
.cnav-empty   { background: #F2F2F2; color: #999; }
.cnav-status  { white-space: normal; min-width: 180px; }
.cnav-warn {
  display: block;
  font-size: 11pt;
  color: #92500A;
  background: #FEF3CD;
  border-left: 3px solid #E0A030;
  padding: 2px 7px;
  margin: 2px 0;
  border-radius: 0 4px 4px 0;
}

/* Preferred-student table */
.pref-table-wrap {
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 1px 6px rgba(0,0,0,0.09), 0 0 0 1px var(--border);
  margin: 10px 0;
}
table.pref-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11pt;
  background: #fff;
}
table.pref-table th, table.pref-table td {
  text-align: left;
  padding: 7px 11px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  white-space: nowrap;
}
table.pref-table th {
  background: var(--illinois-blue);
  color: white;
  font-weight: 700;
  font-size: 11pt;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  vertical-align: bottom;
  padding-top: 10px;
  padding-bottom: 9px;
}
table.pref-table th .th-sub {
  display: block;
  font-weight: 400;
  font-size: 11pt;
  letter-spacing: 0.2px;
  text-transform: none;
  opacity: 0.72;
  margin-top: 2px;
}
table.pref-table tbody tr:last-child td { border-bottom: none; }
table.pref-table tbody tr:nth-child(even) td { background: #F7F9FC; }
table.pref-table tbody tr:hover td { background: #FFF3EE; transition: background 0.1s; }

/* Position column */
table.pref-table td.col-pos {
  text-align: center;
  width: 36px;
  font-size: 16px;
  font-weight: 700;
  color: var(--illinois-orange);
  padding-right: 6px;
}

/* Name column */
table.pref-table td.col-name { white-space: normal; min-width: 150px; }
table.pref-table .stu-name { font-weight: 600; color: var(--illinois-blue); font-size: 11pt; }
table.pref-table .stu-nid  { font-size: 11pt; color: var(--muted); margin-top: 1px; }

/* Program badges */
table.pref-table .prog-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11pt;
  font-weight: 600;
  letter-spacing: 0.2px;
}
table.pref-table .prog-phd { background: #1D3D70; color: #fff; }
table.pref-table .prog-ms  { background: #2A6E55; color: #fff; }
table.pref-table .prog-msc { background: #2A6E55; color: #fff; }

/* Guarantee badge */
table.pref-table .guar-yes {
  display: inline-block;
  background: #E6F4EC;
  color: #1A6B32;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11pt;
  font-weight: 700;
}
table.pref-table .guar-no { color: #ccc; }

/* Taken / TA'd badges */
table.pref-table .check-yes {
  display: inline-block;
  background: #E6F4EC;
  color: #1A6B32;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11pt;
  font-weight: 600;
  cursor: default;
}
table.pref-table .check-no { color: #ccc; }

/* Student-rank badges */
table.pref-table td.col-rank { text-align: center; }
table.pref-table .rank-badge {
  display: inline-block;
  padding: 3px 11px;
  border-radius: 12px;
  font-size: 11pt;
  font-weight: 700;
  min-width: 30px;
  text-align: center;
}
table.pref-table .rank-A { background: #E2F3E8; color: #1A6B32; }
table.pref-table .rank-B { background: #E0ECFB; color: #1D4DA8; }
table.pref-table .rank-C { background: #FEF3CD; color: #92700A; }
table.pref-table .rank-D { background: #F2F2F2; color: #999; }

/* Move buttons */
table.pref-table .mv-btn {
  background: #fff;
  border: 1px solid #d0d5de;
  border-radius: 4px;
  cursor: pointer;
  font-size: 11pt;
  padding: 3px 7px;
  line-height: 1;
  color: var(--illinois-blue);
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
table.pref-table .mv-btn:hover:not(:disabled) {
  background: var(--illinois-blue);
  color: #fff;
  border-color: var(--illinois-blue);
}
table.pref-table .mv-btn:disabled { opacity: 0.18; cursor: default; }

/* Remove button */
table.pref-table .x-btn {
  background: none;
  border: none;
  color: #ccc;
  cursor: pointer;
  font-size: 18px;
  font-weight: 300;
  padding: 0 4px;
  line-height: 1;
  transition: color 0.12s;
}
table.pref-table .x-btn:hover { color: #B33A2C; }

@keyframes row-flash {
  0%   { background: #fde68a !important; }
  60%  { background: #fde68a !important; }
  100% { background: inherit; }
}
table.pref-table tr.row-moved td { animation: row-flash 0.5s ease-out forwards; }

footer {
  text-align: center;
  padding: 20px;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

.muted { color: var(--muted); font-size: 11pt; }
.small { font-size: 11pt; }

@media (max-width: 700px) {
  .card-grid { grid-template-columns: 1fr; }
  .topbar-inner { flex-wrap: wrap; }
}

/* ── Paged form navigation (shared by student.html and instructor-courses.html) ── */
.page-nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  margin-top: 1rem;
  border-top: 2px solid var(--border);
  gap: 1rem;
}
.page-indicator {
  font-size: 0.95em;
  color: var(--illinois-blue);
  font-weight: 600;
  text-align: center;
  flex: 1;
}

/* ── Review table (shared by student.html and instructor-courses.html) ── */
.review-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11pt;
  margin-bottom: 0.5rem;
}
.review-table th, .review-table td {
  padding: 6px 10px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.review-table th {
  background: #f3f3f3;
  width: 35%;
  font-weight: 600;
  color: var(--illinois-blue);
}
.review-course-block {
  margin-top: 1rem;
}
.review-course-title {
  font-weight: 600;
  color: var(--illinois-blue);
  margin-bottom: 0.4rem;
  font-size: 1.05em;
}

/* Screen-reader-only utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* Keyboard focus visible indicator for all interactive elements */
:focus-visible {
  outline: 3px solid var(--illinois-orange);
  outline-offset: 2px;
}

/* Fieldset reset for radio/checkbox groups */
fieldset.radio-group {
  border: none;
  padding: 0;
  margin: 10px 0 4px;
}
fieldset.radio-group > legend {
  font-weight: 600;
  font-size: 11pt;
  padding: 0;
  margin-bottom: 4px;
  float: left;
  width: 100%;
}

/* Non-form-control section labels (tables, etc.) */
.field-label {
  display: block;
  font-weight: 600;
  margin: 10px 0 4px;
  font-size: 11pt;
}