/* ============================================================
   Course Production Board

   Geometry is measured from a live Trello board, not guessed:
     column 272px + 12px gap · list radius 12px · list title 20px/653
     card radius 8px · card title 16px/500 · card gap 8px · badges 14px
     modal 584px wide, 48px from top
   Palette and type are ours.

   Two independent colour scales, deliberately in different FORMS so
   they never read as one signal:
     priority  -> solid label bars across the top of a card (rank)
     deadline  -> a pill in the badge row (urgency)
   ============================================================ */

:root {
  --canvas:      #DFE7E6;
  --list:        #F0F4F3;
  --list-hover:  #E8EEED;
  --card:        #FFFFFF;
  --surface:     #FFFFFF;
  --sunken:      #E4EBEA;

  --text:        #172121;
  --text-2:      #4C5A58;
  --text-3:      #64726F;
  --line:        #D5DEDC;
  --line-2:      #C2CECB;

  --accent:      #2F5D62;
  --accent-text: #FFFFFF;
  --accent-soft: #DCEAEA;

  --over:  #B42318;  --over-bg:  #FDECEA;
  --soon:  #8A5A00;  --soon-bg:  #FDF3DC;
  --ok:    #2A6446;  --ok-bg:    #E4F2EA;

  /* priority label bars — a rank scale, saturated, never reused elsewhere */
  --p1: #D1453B;
  --p2: #E8862D;
  --p3: #4A7DBD;
  --p4: #8393A0;

  --shadow-card: 0 1px 1px rgba(9, 30, 66, .18), 0 0 1px rgba(9, 30, 66, .12);
  --shadow-list: 0 1px 1px rgba(9, 30, 66, .12), 0 0 1px rgba(9, 30, 66, .08);
  --shadow-pop:  0 8px 16px rgba(9, 30, 66, .18), 0 0 0 1px rgba(9, 30, 66, .06);

  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --col: 272px;
  --gap: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas:     #0C1211;
    --list:       #161E1D;
    --list-hover: #1C2625;
    --card:       #1E2A29;
    --surface:    #18211F;
    --sunken:     #121A19;

    --text:       #E6EDEB;
    --text-2:     #A3B2AF;
    --text-3:     #8B9A97;
    --line:       #253230;
    --line-2:     #33423F;

    --accent:      #7CB6BA;
    --accent-text: #0C1211;
    --accent-soft: #1D3335;

    --over: #FF9086;  --over-bg: #3A1B18;
    --soon: #E5B45F;  --soon-bg: #33280F;
    --ok:   #7FCB9F;  --ok-bg:   #143020;

    --p1: #E5675C;
    --p2: #F0A057;
    --p3: #6E9FDB;
    --p4: #93A3B0;

    --shadow-card: 0 1px 1px rgba(0, 0, 0, .5), 0 0 1px rgba(0, 0, 0, .4);
    --shadow-list: 0 1px 1px rgba(0, 0, 0, .4), 0 0 1px rgba(0, 0, 0, .3);
    --shadow-pop:  0 12px 28px rgba(0, 0, 0, .55), 0 0 0 1px rgba(255, 255, 255, .05);
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--text);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

:where(button, input, select, textarea) { font: inherit; color: inherit; }
button { cursor: pointer; }

:where(a, button, input, select, textarea, [tabindex]):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ---------------- top bar ---------------- */

.bar {
  flex: none;
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-wrap: wrap;
  padding: .5rem .75rem;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; flex-direction: column; line-height: 1.2; margin-right: .25rem; }
.brand b { font-size: .9375rem; font-weight: 640; letter-spacing: -.01em; }
.brand span { font-size: .6875rem; color: var(--text-3); }

.views {
  display: flex;
  background: var(--sunken);
  border-radius: 8px;
  padding: 2px;
  gap: 2px;
}

.view-tab {
  border: 0;
  background: none;
  color: var(--text-2);
  padding: .3125rem .75rem;
  border-radius: 6px;
  font-size: .8125rem;
  font-weight: 550;
  transition: background .12s, color .12s;
}
.view-tab:hover { color: var(--text); background: var(--list-hover); }
.view-tab[aria-selected="true"] { background: var(--accent); color: var(--accent-text); }

.field {
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: 6px;
  padding: .3125rem .5rem;
  min-width: 0;
  max-width: 11rem;
}
.field:hover { border-color: var(--text-3); }

.check {
  display: inline-flex; align-items: center; gap: .375rem;
  font-size: .8125rem; color: var(--text-2); white-space: nowrap; cursor: pointer;
}
.check input { accent-color: var(--accent); margin: 0; }

.spacer { flex: 1 1 auto; }

.sync {
  font-family: var(--mono);
  font-size: .625rem;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--text-3);
  display: inline-flex; align-items: center; gap: .375rem;
  white-space: nowrap;
}
.sync::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.sync[data-state="saving"] { color: var(--soon); }
.sync[data-state="saved"]  { color: var(--ok); }
.sync[data-state="error"]  { color: var(--over); }

.btn {
  border: 1px solid var(--line-2);
  background: var(--surface);
  border-radius: 6px;
  padding: .3125rem .625rem;
  font-size: .8125rem;
  white-space: nowrap;
  transition: background .12s, border-color .12s;
}
.btn:hover { background: var(--list-hover); border-color: var(--text-3); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 550; }
.btn-primary:hover { filter: brightness(1.08); background: var(--accent); }
.btn-danger { color: var(--over); border-color: transparent; background: none; }
.btn-danger:hover { background: var(--over-bg); border-color: var(--over); }

.banner {
  flex: none;
  padding: .5rem .75rem;
  font-size: .8125rem;
  background: var(--soon-bg);
  color: var(--soon);
  border-bottom: 1px solid var(--line);
}
.banner[hidden] { display: none; }
.banner.is-error { background: var(--over-bg); color: var(--over); }

/* ---------------- board ---------------- */

.board {
  flex: 1 1 auto;
  display: flex;
  align-items: flex-start;
  gap: var(--gap);
  padding: var(--gap);
  overflow-x: auto;
  overflow-y: hidden;
}

.list {
  flex: 0 0 var(--col);
  width: var(--col);
  max-height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--list);
  border-radius: 12px;
  padding-bottom: 4px;
  box-shadow: var(--shadow-list);
}
.list.is-over { background: var(--accent-soft); }

.list-head {
  flex: none;
  display: flex;
  align-items: baseline;
  gap: .5rem;
  padding: 10px 12px 6px;
}

.list-title {
  font-size: 15px;
  font-weight: 650;
  line-height: 20px;
  letter-spacing: -.01em;
  color: var(--text);
  flex: 1;
  min-width: 0;
}

.list-count {
  font-family: var(--mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--text-3);
}

.list-sort {
  border: 0; background: none; color: var(--text-3);
  font-size: 11px; padding: 0 2px; border-radius: 4px;
}
.list-sort:hover { color: var(--text); background: var(--list-hover); }

.list-cards {
  flex: 1 1 auto;
  min-height: 8px;
  overflow-y: auto;
  padding: 0 4px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.list-empty {
  color: var(--text-3);
  font-size: .8125rem;
  padding: .5rem .5rem .75rem;
  font-style: italic;
}

/* inline composer at the bottom of every list — Trello's placement */
.add-row { flex: none; padding: 4px; }

.add-btn {
  width: 100%;
  text-align: left;
  border: 0;
  background: none;
  color: var(--text-2);
  padding: .4375rem .5rem;
  border-radius: 8px;
  font-size: .875rem;
  transition: background .12s, color .12s;
}
.add-btn:hover { background: var(--list-hover); color: var(--text); }

.composer {
  background: var(--card);
  border-radius: 8px;
  box-shadow: var(--shadow-card);
  padding: .5rem;
}
.composer textarea {
  width: 100%;
  border: 0;
  background: none;
  resize: none;
  font-size: 16px;
  line-height: 20px;
  min-height: 44px;
  outline: none;
}
.composer-actions { display: flex; align-items: center; gap: .5rem; margin-top: .375rem; }

/* ---------------- card ---------------- */

.card {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--card);
  border: 0;
  border-radius: 8px;
  box-shadow: var(--shadow-card);
  padding: 0;
  overflow: hidden;
  cursor: pointer;
  transition: background .1s;
}
.card:hover { background: var(--list-hover); }
.card.is-dragging { opacity: .45; }
.card[draggable="true"] { cursor: grab; }

/* priority label bars — the rank scale, and the only place these hues appear */
.labels { display: flex; gap: 4px; padding: 8px 12px 0; }
.label-bar { height: 8px; min-width: 40px; border-radius: 4px; }
.label-bar[data-p="1"] { background: var(--p1); }
.label-bar[data-p="2"] { background: var(--p2); }
.label-bar[data-p="3"] { background: var(--p3); }
.label-bar[data-p="4"] { background: var(--p4); }

.card-eyebrow {
  padding: 8px 12px 0;
  font-size: 12px;
  line-height: 16px;
  color: var(--text-3);
}

.card-title {
  padding: 4px 12px 0;
  font-size: 16px;
  font-weight: 500;
  line-height: 20px;
  color: var(--text);
  overflow-wrap: anywhere;
}

.card-badges {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  padding: 8px 12px 10px;
  font-size: 14px;
  color: var(--text-2);
}

/* deadline — the urgency scale, always a pill, never a bar */
.due {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--sunken);
  color: var(--text-2);
}
.due[data-u="over"] { background: var(--over-bg); color: var(--over); font-weight: 600; }
.due[data-u="soon"] { background: var(--soon-bg); color: var(--soon); }
.due[data-u="done"] { background: var(--ok-bg);   color: var(--ok); }

.checks {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px; font-variant-numeric: tabular-nums; color: var(--text-3);
  padding: 2px 4px;
}
.checks[data-complete="1"] { color: var(--ok); }

.tag {
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}

.gate {
  font-size: 11px;
  padding: 1px 5px;
  border-radius: 4px;
  border: 1px dashed var(--line-2);
  color: var(--text-3);
}

.avatars { display: inline-flex; gap: 2px; margin-left: auto; }

.avatar {
  width: 24px; height: 24px;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 620; color: #fff;
  letter-spacing: .01em;
}

/* ---------------- wave view ---------------- */

.course-card {
  background: var(--card);
  border-radius: 8px;
  box-shadow: var(--shadow-card);
  padding: 10px 12px 12px;
}
.course-title { font-size: 15px; font-weight: 600; line-height: 19px; margin-bottom: 2px; }
.course-dept { font-size: 12px; color: var(--text-3); margin-bottom: 8px; }

.strip { display: flex; gap: 2px; margin-bottom: 8px; }
.seg {
  flex: 1; height: 6px; border-radius: 2px;
  background: var(--sunken); border: 0; padding: 0; cursor: pointer;
}
.seg[data-s="in-progress"] { background: var(--soon); }
.seg[data-s="review"]      { background: var(--accent); }
.seg[data-s="done"]        { background: var(--ok); }
.seg[data-unscheduled="1"] { opacity: .3; }

.course-rows { display: flex; flex-direction: column; }
.course-row {
  display: flex; align-items: center; gap: .5rem;
  width: 100%; text-align: left;
  background: none; border: 0; border-left: 2px solid transparent;
  padding: 3px 4px; border-radius: 4px; font-size: 12px;
}
.course-row:hover { background: var(--list-hover); }
.course-row[data-u="over"] { border-left-color: var(--over); }
.course-row[data-u="soon"] { border-left-color: var(--soon); }
.course-row[data-u="done"] { border-left-color: var(--ok); }
.course-row-name { flex: 1; min-width: 0; color: var(--text-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.course-row-date { font-family: var(--mono); font-size: 11px; color: var(--text-3); font-variant-numeric: tabular-nums; }

.course-foot {
  margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--line);
  font-size: 12px; color: var(--text-3); font-variant-numeric: tabular-nums;
}

/* ---------------- modal (584px, 48px from top — Trello's measurements) ---------------- */

.scrim {
  position: fixed; inset: 0;
  background: rgba(9, 30, 66, .54);
  z-index: 40;
  overflow-y: auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}
.scrim[hidden] { display: none; }

.modal {
  width: 584px;
  max-width: calc(100vw - 24px);
  margin: 48px 0;
  background: var(--surface);
  border-radius: 12px;
  box-shadow: var(--shadow-pop);
  overflow: hidden;
}

.modal-head {
  display: flex; align-items: flex-start; gap: .5rem;
  padding: 16px 16px 8px;
}
.modal-title {
  flex: 1;
  font-size: 20px; font-weight: 620; line-height: 26px;
  border: 1px solid transparent; border-radius: 6px;
  padding: 2px 6px; margin: -2px -6px;
  background: none; width: 100%;
  font-family: inherit;
}
.modal-title:hover { background: var(--sunken); }
.modal-title:focus { background: var(--surface); border-color: var(--accent); outline: none; }

.modal-sub { padding: 0 16px 12px; font-size: 13px; color: var(--text-3); }

.modal-close {
  border: 0; background: none; color: var(--text-2);
  font-size: 20px; line-height: 1; padding: 2px 6px; border-radius: 6px;
}
.modal-close:hover { background: var(--sunken); color: var(--text); }

.modal-body { padding: 0 16px 16px; display: flex; flex-direction: column; gap: 16px; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.f { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.f-label {
  font-size: 11px; font-weight: 620; text-transform: uppercase;
  letter-spacing: .06em; color: var(--text-3);
}
.f-input {
  background: var(--sunken);
  border: 1px solid transparent;
  border-radius: 6px;
  padding: .4375rem .5rem;
  width: 100%;
}
.f-input:hover { background: var(--list-hover); }
.f-input:focus { background: var(--surface); border-color: var(--accent); outline: none; }
textarea.f-input { resize: vertical; min-height: 72px; font-family: inherit; line-height: 1.45; }

.section-title {
  font-size: 13px; font-weight: 620; color: var(--text-2);
  display: flex; align-items: center; gap: .5rem;
}

/* subtasks */

.progress-wrap { display: flex; align-items: center; gap: .5rem; }
.progress {
  flex: 1; height: 8px; border-radius: 4px; background: var(--sunken); overflow: hidden;
}
.progress i { display: block; height: 100%; background: var(--ok); transition: width .18s; }
.progress-num { font-family: var(--mono); font-size: 12px; color: var(--text-3); font-variant-numeric: tabular-nums; }

.subtasks { display: flex; flex-direction: column; gap: 2px; }

.subtask {
  display: flex; align-items: flex-start; gap: .5rem;
  padding: .375rem .5rem; border-radius: 6px;
}
.subtask:hover { background: var(--sunken); }
.subtask input[type="checkbox"] { margin: 3px 0 0; accent-color: var(--ok); width: 15px; height: 15px; flex: none; }
.subtask-text {
  flex: 1; border: 1px solid transparent; background: none; border-radius: 4px;
  padding: 1px 4px; margin: -1px -4px; font-size: 14px; line-height: 20px;
}
.subtask-text:focus { background: var(--surface); border-color: var(--accent); outline: none; }
.subtask.is-done .subtask-text { text-decoration: line-through; color: var(--text-3); }
.subtask-del {
  border: 0; background: none; color: var(--text-3); padding: 0 4px; border-radius: 4px;
  opacity: 0; font-size: 15px; line-height: 1;
}
.subtask:hover .subtask-del { opacity: 1; }
.subtask-del:hover { color: var(--over); background: var(--over-bg); }

/* assignees */

.people { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.person-chip {
  display: inline-flex; align-items: center; gap: .375rem;
  padding: 3px 8px 3px 3px; border-radius: 999px;
  background: var(--sunken); border: 1px solid transparent;
  font-size: 13px;
}
.person-chip[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); }
.person-chip .avatar { width: 20px; height: 20px; font-size: 10px; }

.modal-foot {
  display: flex; gap: .5rem; align-items: center;
  padding: 12px 16px; border-top: 1px solid var(--line); background: var(--sunken);
}

@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
  .brand span { display: none; }
  .modal { margin: 12px 0; }
}