.course-shell.wrap { max-width: 1520px; }
.tool-head { padding-top: 48px; padding-bottom: 28px; }
.tool-stamp { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.tool-stamp .eyebrow { color: var(--ink-soft); }
.tool-head__row { display: grid; grid-template-columns: minmax(0, 1.5fr) auto; gap: 36px; align-items: end; margin-top: 22px; }
.tool-head h1 { font-size: clamp(40px, 4.6vw, 64px); line-height: 1.05; letter-spacing: -.05em; margin: 10px 0 0; }
.tool-head h1 span { color: var(--orange); }
.tool-head__desc { margin-top: 16px; max-width: 58ch; color: var(--ink-soft); }
.tool-links { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.tool-links a { padding: 8px 12px; border: var(--line); border-radius: 5px; font: 11px var(--mono); letter-spacing: .04em; color: var(--ink-soft); white-space: nowrap; }
.tool-links a:hover { color: var(--orange); border-color: var(--orange); }

.station-layout { display: grid; grid-template-columns: minmax(300px, 340px) minmax(0, 1fr); gap: 24px; align-items: start; }
.selection-sidebar { display: grid; gap: 20px; position: sticky; top: 96px; min-width: 0; }
.station-panel { background: var(--surface); border: var(--line); border-radius: 8px; overflow: hidden; display: flex; flex-direction: column; min-width: 0; }
.tt-panel { margin-top: 24px; }
.panel-head, .panel-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 16px; }
.panel-head { border-bottom: var(--line); }
.panel-foot { border-top: var(--line); font: 10px var(--mono); letter-spacing: .06em; color: var(--ink-faint); text-transform: uppercase; }
.panel-head .t { font-weight: 600; font-size: 14px; display: inline-flex; align-items: center; }
.panel-head .label, #summary { font: 11px var(--mono); color: var(--ink-soft); font-weight: 400; }
#summary b { font-weight: 650; color: var(--ink); }
.panel-body { padding: 16px; flex: 1; min-width: 0; }
.lamp { width: 8px; height: 8px; border-radius: 50%; background: var(--orange); margin-right: 8px; flex: 0 0 auto; }
.lamp.amber { background: var(--amber); }
.lamp.green { background: var(--green); }
.actions-end { display: flex; gap: 8px; text-transform: none; letter-spacing: 0; }

.field { display: block; margin-bottom: 12px; }
.field > .label, .field > span.label { display: block; margin-bottom: 6px; font: 10px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-soft); }
.field input, .field select, .foot-btn, .week-controls button, .week-controls select, .mini-week-controls button {
  border: var(--line); border-radius: 5px; background: var(--paper); color: var(--ink); font-size: 13px;
}
.field input, .field select { width: 100%; padding: 10px 12px; }
.field input:focus, .field select:focus, .week-controls select:focus { border-color: var(--orange); outline: none; }
.filters { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px 12px; padding-bottom: 12px; border-bottom: var(--line); margin-bottom: 8px; }
.field-inline { margin-bottom: 0; }
.credit-range { grid-column: 1 / -1; }
.credit-range-inputs { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.credit-range-inputs input { width: auto; flex: 1 1 88px; }
.foot-btn { padding: 6px 12px; font: 11px var(--mono); letter-spacing: .04em; background: transparent; }
.foot-btn:hover, .course-actions button:hover { border-color: var(--ink); background: var(--ink); color: var(--paper); }
.foot-btn.danger { border-color: var(--red); color: var(--red); }
.foot-btn.danger:hover { background: var(--red); border-color: var(--red); color: white; }

#courseList { max-height: 640px; overflow: auto; }
#selectedList { max-height: 160px; overflow: auto; }
.course-item { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; align-items: center; padding: 14px 4px; border-bottom: var(--line); }
.course-item:hover { background: var(--paper-deep); }
.course-code { font: 11px var(--mono); letter-spacing: .04em; color: var(--orange); }
.course-name { font-size: 15px; font-weight: 600; line-height: 1.4; margin-top: 2px; }
.course-meta { margin-top: 4px; font-size: 12px; color: var(--ink-soft); line-height: 1.5; }
.badges { display: inline-flex; gap: 4px; margin-left: 6px; vertical-align: middle; }
.badge { display: inline-block; padding: 1px 6px; border: var(--line); border-radius: 4px; background: transparent; font: 10px var(--mono); color: var(--ink-soft); }
.badge.g-考试 { border-color: color-mix(in srgb, var(--orange) 55%, transparent); color: var(--orange); }
.badge.g-考查 { border-color: color-mix(in srgb, var(--green) 55%, transparent); color: var(--green); }
.badge.attr { border-color: color-mix(in srgb, var(--ink-soft) 45%, transparent); }
.course-actions { display: flex; gap: 8px; }
.course-actions button { padding: 6px 10px; border: var(--line); border-radius: 5px; background: transparent; color: var(--ink); font: 11px var(--mono); letter-spacing: .04em; }
.course-actions .detail { color: var(--ink-soft); }
.course-actions .remove { border-color: var(--red); color: var(--red); }
.course-actions .remove:hover { background: var(--red); border-color: var(--red); color: white; }
.selection-sidebar .course-item { display: block; }
.selection-sidebar .course-actions { justify-content: flex-end; margin-top: 8px; }
.empty-hint { padding: 18px 4px; color: var(--ink-faint); font-size: 13px; }

.mini-week-controls { display: flex; align-items: center; gap: 4px; white-space: nowrap; font: 12px var(--mono); color: var(--ink-soft); }
.mini-week-controls button { width: 30px; min-height: 32px; font-size: 18px; line-height: 1; background: transparent; }
.mini-week-controls button:hover { color: var(--orange); border-color: var(--orange); }
.mini-week-controls button:disabled { opacity: .35; cursor: default; }
.mini-timetable { width: 100%; table-layout: fixed; border-collapse: separate; border-spacing: 2px; line-height: 1; }
.mini-timetable th, .mini-timetable td { padding: 0; border: 0; }
.mini-timetable thead th { height: 14px; font: 10px var(--mono); font-weight: 400; color: var(--ink-faint); line-height: 12px; }
.mini-timetable tbody th { height: 7px; width: 16px; font: 7px var(--mono); font-weight: 400; color: var(--ink-faint); line-height: 7px; }
.mini-timetable td { height: 7px; background: var(--paper-deep); line-height: 0; }
.mini-timetable td.occupied { background: var(--orange); }
#occupancySummary { font-size: 12px; margin: 12px 0 8px; color: var(--ink-soft); }
.occupancy-key { display: flex; align-items: center; gap: 6px; font-size: 10px; color: var(--ink-faint); }
.occupancy-key i { width: 8px; height: 8px; background: var(--orange); }
.occupancy-key span { margin-left: auto; }
.semester-load { display: flex; gap: 2px; align-items: end; margin: 16px 0 8px; max-width: 100%; border-bottom: var(--line); }
.semester-load button { flex: 1; min-width: 0; min-height: 44px; display: flex; flex-direction: column; justify-content: end; align-items: center; gap: 4px; padding: 2px 0; border: 0; background: transparent; color: var(--ink-faint); font: 10px var(--mono); }
.semester-load i { display: block; width: 70%; background: var(--paper-dark); }
.semester-load .current { color: var(--orange); }
.semester-load .current i { background: var(--orange); }
.semester-load button:hover { color: var(--orange); }
.occupancy-link { display: inline-block; padding: 10px 0 2px; font-size: 12px; color: var(--orange); }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }

.week-controls { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.week-controls button { width: 28px; height: 28px; display: grid; place-items: center; padding: 0; background: transparent; font-size: 16px; }
.week-controls button:hover, .week-controls select:hover { color: var(--orange); border-color: var(--orange); }
#todayWeekBtn { width: auto; height: auto; padding: 4px 10px; font: 11px var(--mono); }
.week-controls select { padding: 4px 8px; font-size: 12px; }
#timetable { overflow-x: auto; }
.tt-week-label { font: 11px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--orange); margin-bottom: 12px; }
#timetable table { border-collapse: collapse; width: 100%; min-width: 860px; table-layout: fixed; font-size: 12px; }
#timetable th, #timetable td { border: var(--line); padding: 4px 6px; vertical-align: top; }
#timetable thead th { background: var(--ink); color: var(--paper); font: 11px var(--mono); font-weight: 500; letter-spacing: .04em; white-space: nowrap; position: sticky; top: 0; }
#timetable tbody th { background: var(--paper-deep); font: 11px var(--mono); color: var(--ink-soft); text-align: center; width: 52px; }
#timetable td { height: 48px; }
.tt-empty { color: var(--ink-faint); font-size: 12px; text-align: center; }
.course-cell { background: color-mix(in srgb, var(--orange) 18%, var(--paper)); color: var(--ink); padding: 6px; border-left: 2px solid var(--orange); border-radius: 4px; font-size: 11px; text-align: left; margin-bottom: 3px; }
.cname { font: 10px var(--mono); color: var(--orange); font-weight: 600; }
.cmeta { font-size: 10px; margin-top: 3px; color: var(--ink-soft); }

.overlay { position: fixed; inset: 0; z-index: 100; background: #20271f66; display: flex; align-items: center; justify-content: center; padding: 20px; backdrop-filter: blur(5px); }
.hidden { display: none !important; }
.modal { position: relative; background: var(--paper); width: min(680px, 100%); max-height: 88vh; overflow: auto; border: var(--line); border-radius: 12px; padding: 32px; box-shadow: 0 30px 100px #18231933; }
#modalCloseBtn { position: absolute; right: 12px; top: 12px; width: 32px; height: 32px; border: var(--line); border-radius: 5px; background: transparent; font-size: 18px; color: var(--ink-soft); }
#modalCloseBtn:hover { background: var(--ink); color: var(--paper); }
.detail-code { font: 12px var(--mono); color: var(--orange); }
.detail-name { font-size: 28px; line-height: 1.2; margin: 8px 0 0; }
.detail-meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px 18px; margin-top: 18px; font-size: 13px; }
.detail-meta label { display: block; color: var(--ink-soft); font: 10px var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.detail-slots-title { margin: 24px 0 8px; font: 11px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-soft); }
.slot-row { padding: 12px 0; border-top: var(--line); font-size: 13px; }
.slot-main { font-weight: 600; }
.slot-sub { color: var(--ink-soft); margin-top: 2px; }
.detail-actions { display: flex; gap: 10px; margin-top: 24px; }
.detail-actions button { padding: 10px 18px; border: var(--line); border-radius: 5px; background: transparent; font-size: 13px; }
.detail-actions #modalAddBtn { background: var(--orange); border-color: var(--orange); color: white; }
.detail-actions button:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
#toast { position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--paper); padding: 13px 22px; border-radius: 8px; z-index: 200; opacity: 0; pointer-events: none; max-width: 90vw; transition: opacity .2s; font-size: 13px; }
#toast.show { opacity: 1; }
#toast.error { background: #9b3e29; color: white; }
#course-panel, #timetable-panel, #selected-panel { scroll-margin-top: 100px; }

html[data-theme="dark"] .course-shell .badge,
html[data-theme="dark"] .course-shell .course-actions button,
html[data-theme="dark"] .course-shell .course-actions .detail { background: transparent; color: var(--ink); }
html[data-theme="dark"] .course-shell .badge { color: var(--ink-soft); }
html[data-theme="dark"] .course-shell .badge.g-考试 { background: transparent; color: var(--orange); }
html[data-theme="dark"] .course-shell .course-cell { background: color-mix(in srgb, var(--orange) 22%, var(--surface)); color: var(--ink); }
html[data-theme="dark"] .course-shell .detail-actions #modalAddBtn { background: var(--orange); color: #19201b; border-color: var(--orange); }
html[data-theme="dark"] .course-shell .foot-btn:hover,
html[data-theme="dark"] .course-shell .course-actions button:hover { color: #111; }

@media (max-width: 1000px) {
  .tool-head__row { grid-template-columns: 1fr; gap: 18px; }
  .tool-links { justify-content: flex-start; }
  .station-layout { grid-template-columns: 1fr; }
  .selection-sidebar { position: static; order: 1; grid-template-columns: 1fr 1fr; align-items: start; }
  #course-panel { order: 0; }
}
@media (max-height: 850px) { .selection-sidebar { position: static; } }
@media (max-width: 640px) {
  .tool-head { padding-top: 28px; }
  .tool-head h1 { font-size: 36px; }
  .selection-sidebar { grid-template-columns: 1fr; }
  .filters { grid-template-columns: 1fr; }
  #selectedList { max-height: 300px; }
  .semester-load { overflow-x: auto; }
  .semester-load button { flex: 0 0 28px; }
  .mini-timetable tbody th { height: 9px; line-height: 9px; }
  .mini-timetable td { height: 9px; }
  .mini-week-controls button { min-height: 36px; }
  .panel-head, .panel-foot { flex-wrap: wrap; }
  .detail-name { font-size: 22px; }
  .modal { padding: 24px 18px; }
}