/* Class Planner — light, paper, ruled-grid. One accent (deep teal);
   subject colors carry the timetable. Custom scrollbars (webkit + Firefox). */

:root {
  --paper: #fbfbfa;
  --card: #ffffff;
  --ink: #1b1a18;
  --muted: #6f6a63;
  --faint: #a8a29a;
  --hairline: #e7e4de;
  --accent: #0f766e;
  --accent-deep: #0b5d57;
  --accent-wash: #e6f4f2;
  --danger: #b91c1c;
  --danger-wash: #fdecec;
  --warn: #c2410c;
  --warn-wash: #fdf1e7;
  --amber: #a16207;
  --amber-wash: #faf3e3;
  --ok: #15803d;
  --radius: 10px;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", sans-serif;
}

/* custom scrollbar: webkit */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb { background: #cfc9bd; border-radius: 6px; border: 2px solid var(--paper); }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }
/* custom scrollbar: firefox */
* { scrollbar-width: thin; scrollbar-color: #cfc9bd var(--paper); }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
}

.page { max-width: 1060px; margin: 0 auto; padding: 0 18px 60px; }

/* masthead */
.masthead { padding: 22px 0 0; border-bottom: 2px solid var(--ink); margin-bottom: 22px; }
.masthead-row { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 26px;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}
.masthead-right { display: flex; align-items: center; gap: 12px; }
.dateline { margin: 0; color: var(--muted); font-size: 13px; }
.member-chip {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--hairline);
  background: var(--card);
  color: var(--ink);
  border-radius: 999px;
  padding: 5px 12px;
  cursor: pointer;
}
.member-chip:hover { border-color: var(--accent); color: var(--accent-deep); }

.tabs { display: flex; gap: 4px; margin-top: 14px; overflow-x: auto; }
.tabs a {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  padding: 8px 13px;
  border-radius: 8px 8px 0 0;
  border: 1px solid transparent;
  border-bottom: none;
  white-space: nowrap;
}
.tabs a:hover { color: var(--ink); background: #f3f1ec; }
.tabs a.active { color: var(--ink); background: var(--card); border-color: var(--hairline); font-weight: 600; }
.tab-count {
  display: inline-block; min-width: 20px; text-align: center;
  font-size: 11px; font-weight: 700; border-radius: 999px;
  background: var(--accent); color: #fff; padding: 1px 6px; margin-left: 4px;
  vertical-align: 1px;
}
.tab-count.zero { display: none; }

#view { min-height: 50vh; }
.colophon { margin-top: 48px; border-top: 1px solid var(--hairline); padding-top: 14px; color: var(--faint); font-size: 13px; }

/* generic */
h2.view-title { font-family: var(--font-display); font-size: 22px; letter-spacing: -0.01em; margin: 4px 0 4px; }
.view-sub { color: var(--muted); font-size: 14px; margin: 0 0 18px; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 16px; }

button, .btn {
  font-family: var(--font-display);
  font-size: 14px; font-weight: 600;
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  border: 1px solid var(--hairline);
  background: var(--card);
  color: var(--ink);
}
button:hover, .btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-deep); color: #fff; }
.btn-danger { color: var(--danger); }
.btn-danger:hover { border-color: var(--danger); }
.btn-small { font-size: 12px; padding: 5px 10px; }
.btn-quiet { border-color: transparent; color: var(--muted); }
.btn-quiet:hover { color: var(--ink); border-color: var(--hairline); }

input[type="text"], input[type="date"], select, textarea {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 8px 10px;
}
input[type="text"]:focus, input[type="date"]:focus, select:focus, textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 0;
  border-color: var(--accent);
}
input[type="color"] { border: 1px solid var(--hairline); border-radius: 6px; padding: 2px; width: 40px; height: 32px; background: var(--card); }
label.field { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 4px; }
label.field input, label.field select, label.field textarea { display: block; width: 100%; margin-top: 4px; }
.form-row { display: flex; gap: 10px; flex-wrap: wrap; }
.form-row > * { flex: 1 1 140px; }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-display); font-size: 12px; font-weight: 600;
  border-radius: 999px; padding: 3px 10px;
  color: #fff; background: var(--muted);
  white-space: nowrap;
}
.chip .dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,.85); }
.kind-tag {
  font-family: var(--font-display); font-size: 11px; font-weight: 600;
  letter-spacing: .04em; text-transform: uppercase;
  color: var(--muted); border: 1px solid var(--hairline);
  border-radius: 6px; padding: 2px 7px; white-space: nowrap;
}
.byline { font-size: 12px; color: var(--faint); }

/* filter chips */
.fchip {
  font-family: var(--font-display); font-size: 13px; font-weight: 500;
  border: 1px solid var(--hairline); background: var(--card); color: var(--muted);
  border-radius: 999px; padding: 5px 12px; cursor: pointer;
}
.fchip.on { background: var(--ink); border-color: var(--ink); color: #fff; }

/* timetable */
.tt-day-tabs { display: none; gap: 6px; margin-bottom: 12px; overflow-x: auto; }
.tt-grid {
  display: grid;
  grid-template-columns: 52px repeat(5, 1fr);
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
}
.tt-corner { background: #f4f2ed; border-bottom: 1px solid var(--hairline); }
.tt-dayhead {
  background: #f4f2ed; border-bottom: 1px solid var(--hairline);
  border-left: 1px solid var(--hairline);
  padding: 10px 6px; text-align: center;
  font-family: var(--font-display); font-size: 14px; font-weight: 600;
}
.tt-dayhead .day-sub { display: block; font-family: var(--font-body); font-weight: 400; font-size: 11px; color: var(--muted); margin-top: 4px; }
.tt-dayhead .day-sub button { font-size: 11px; padding: 2px 8px; margin: 0 2px; }
.tt-dayhead .day-sub button.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.tt-plabel {
  font-family: var(--font-display); font-weight: 700; font-size: 13px; color: var(--muted);
  background: #f4f2ed; border-top: 1px solid var(--hairline);
  display: flex; align-items: center; justify-content: center;
  min-height: 58px;
}
.tt-cell {
  border-top: 1px solid var(--hairline); border-left: 1px solid var(--hairline);
  cursor: pointer; min-height: 58px; padding: 4px;
  display: flex; align-items: stretch; justify-content: stretch;
}
.tt-cell:hover { outline: 2px solid var(--accent); outline-offset: -2px; }
.tt-cell .subj {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  border-radius: 7px; color: #fff;
  font-family: var(--font-display); font-weight: 600; font-size: 14px;
  padding: 6px 4px; line-height: 1.2; text-align: center;
}
.tt-cell .subj small { font-weight: 500; font-size: 10px; opacity: .85; }
.tt-cell.free { color: var(--faint); font-size: 13px; align-items: center; justify-content: center; }
@media (max-width: 720px) {
  .tt-day-tabs { display: flex; }
  .tt-grid { grid-template-columns: 44px 1fr; }
  .tt-grid.m-day-1 [data-day]:not([data-day="1"]),
  .tt-grid.m-day-2 [data-day]:not([data-day="2"]),
  .tt-grid.m-day-3 [data-day]:not([data-day="3"]),
  .tt-grid.m-day-4 [data-day]:not([data-day="4"]),
  .tt-grid.m-day-5 [data-day]:not([data-day="5"]) { display: none; }
}

/* week view */
.wk-nav { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.wk-nav h3 { font-family: var(--font-display); font-size: 17px; margin: 0; flex: 1; text-align: center; }
.wk-day-tabs { display: none; gap: 6px; margin-bottom: 12px; overflow-x: auto; }
.wk-grid {
  display: grid;
  grid-template-columns: 46px repeat(7, 1fr);
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
}
.wk-corner { background: #f4f2ed; border-bottom: 1px solid var(--hairline); }
.wk-dayhead {
  background: #f4f2ed; border-bottom: 1px solid var(--hairline);
  border-left: 1px solid var(--hairline);
  padding: 8px 4px; text-align: center;
}
.wk-dayhead .dow { display: block; font-family: var(--font-display); font-size: 12px; font-weight: 600; color: var(--muted); }
.wk-dayhead .dnum {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 17px; font-weight: 700;
  width: 28px; height: 28px; border-radius: 50%; margin-top: 2px;
}
.wk-dayhead.today .dnum { background: var(--ink); color: #fff; }
.wk-dayhead.we { opacity: .55; }
.tt-cell.static { cursor: default; }
.tt-cell.static:hover { outline: none; }
.tt-cell.we { color: var(--faint); font-size: 13px; align-items: center; justify-content: center; background: #faf9f6; }
.wk-tlabel {
  font-family: var(--font-display); font-size: 11px; font-weight: 600; color: var(--muted);
  background: #f4f2ed; border-top: 1px solid var(--hairline);
  display: flex; align-items: center; justify-content: center;
}
.wk-tasks {
  border-top: 1px solid var(--hairline); border-left: 1px solid var(--hairline);
  padding: 6px 4px 4px; min-height: 44px; background: #fbfbfa;
}
.wk-tasks .cal-item { cursor: pointer; }
.wk-add {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; border-radius: 50%;
  font-size: 14px; line-height: 1; padding: 0; margin-top: 4px;
  color: var(--faint); border: 1px dashed var(--hairline); background: transparent;
}
.wk-add:hover { color: var(--accent-deep); border-color: var(--accent); }
@media (max-width: 720px) {
  .wk-day-tabs { display: flex; }
  .wk-grid { grid-template-columns: 44px 1fr; }
  .wk-grid.m-wday-1 [data-wday]:not([data-wday="1"]),
  .wk-grid.m-wday-2 [data-wday]:not([data-wday="2"]),
  .wk-grid.m-wday-3 [data-wday]:not([data-wday="3"]),
  .wk-grid.m-wday-4 [data-wday]:not([data-wday="4"]),
  .wk-grid.m-wday-5 [data-wday]:not([data-wday="5"]),
  .wk-grid.m-wday-6 [data-wday]:not([data-wday="6"]),
  .wk-grid.m-wday-7 [data-wday]:not([data-wday="7"]) { display: none; }
}

/* upcoming */
.bucket { margin-bottom: 26px; }
.bucket > h3 { font-family: var(--font-display); font-size: 15px; margin: 0 0 10px; display: flex; align-items: center; gap: 8px; }
.bucket > h3 .n { font-size: 12px; color: var(--muted); font-weight: 500; }
.task {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--card); border: 1px solid var(--hairline); border-radius: var(--radius);
  padding: 12px 14px; margin-bottom: 8px;
}
.task.done { opacity: .55; }
.task.done .task-title { text-decoration: line-through; }
.days-badge {
  flex: 0 0 64px; text-align: center;
  border-radius: 8px; padding: 6px 4px;
  font-family: var(--font-display);
  background: #f1efe9; color: var(--muted);
}
.days-badge .num { display: block; font-size: 22px; font-weight: 700; line-height: 1.1; }
.days-badge .lbl { display: block; font-size: 10px; font-weight: 600; letter-spacing: .03em; }
.days-badge.overdue { background: var(--danger-wash); color: var(--danger); }
.days-badge.today { background: var(--warn-wash); color: var(--warn); }
.days-badge.tomorrow { background: var(--amber-wash); color: var(--amber); }
.task-main { flex: 1; min-width: 0; }
.task-title { font-weight: 600; font-size: 15px; margin: 0 0 2px; }
.task-meta { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin-top: 6px; }
.task-detail { color: var(--muted); font-size: 13px; margin: 4px 0 0; white-space: pre-wrap; }
.task-actions { display: flex; gap: 6px; align-items: center; }
.task-actions input[type="checkbox"] { width: 20px; height: 20px; accent-color: var(--accent); cursor: pointer; }
.empty { border: 1px dashed var(--hairline); border-radius: var(--radius); padding: 26px; text-align: center; color: var(--muted); }

/* calendar */
.cal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.cal-head h3 { font-family: var(--font-display); font-size: 18px; margin: 0; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.cal-dow { font-family: var(--font-display); font-size: 12px; font-weight: 600; color: var(--muted); text-align: center; padding: 4px; }
.cal-day {
  min-height: 92px; background: var(--card); border: 1px solid var(--hairline);
  border-radius: 8px; padding: 6px; cursor: pointer; text-align: left; display: block; width: 100%;
  font-family: var(--font-body);
}
.cal-day:hover { border-color: var(--accent); }
.cal-day.other { opacity: .35; }
.cal-day .dnum { font-family: var(--font-display); font-weight: 700; font-size: 13px; }
.cal-day.today .dnum { background: var(--ink); color: #fff; border-radius: 50%; width: 24px; height: 24px; display: inline-flex; align-items: center; justify-content: center; }
.cal-item {
  display: block; font-size: 11px; font-weight: 600; color: #fff; border-radius: 4px;
  padding: 1px 5px; margin-top: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.cal-item.done { opacity: .45; text-decoration: line-through; }
.cal-more { font-size: 11px; color: var(--muted); margin-top: 2px; }

/* inbox */
.inbox-add { display: flex; gap: 8px; margin-bottom: 18px; }
.inbox-add input { flex: 1; }
.inbox-item {
  display: flex; gap: 12px; align-items: flex-start;
  background: var(--card); border: 1px solid var(--hairline); border-radius: var(--radius);
  padding: 12px 14px; margin-bottom: 8px;
}
.inbox-item p { margin: 0 0 4px; flex: 1; }
.inbox-item .row-actions { display: flex; gap: 6px; flex-wrap: wrap; }

/* library */
.lib-group { margin-bottom: 24px; }
.lib-group > h3 { font-family: var(--font-display); font-size: 15px; margin: 0 0 10px; display: flex; align-items: center; gap: 8px; }
.info-card { background: var(--card); border: 1px solid var(--hairline); border-radius: var(--radius); padding: 12px 14px; margin-bottom: 8px; }
.info-card h4 { margin: 0 0 4px; font-size: 15px; }
.info-card .info-body { font-size: 14px; color: var(--ink); white-space: pre-wrap; margin: 6px 0; }
.info-card a.ext { color: var(--accent-deep); font-weight: 600; }

/* settings */
.set-section { background: var(--card); border: 1px solid var(--hairline); border-radius: var(--radius); padding: 16px; margin-bottom: 16px; }
.set-section h3 { font-family: var(--font-display); font-size: 16px; margin: 0 0 8px; }
.subj-row { display: flex; align-items: center; gap: 10px; padding: 8px 0; border-bottom: 1px solid var(--hairline); }
.subj-row:last-child { border-bottom: none; }
.subj-row input[type="text"].nm { flex: 2; }
.subj-row input[type="text"].sh { flex: 0 0 64px; }
.subj-row .grow { flex: 1; }

/* modal */
.modal-back {
  position: fixed; inset: 0; background: rgba(27,26,24,.45);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 8vh 16px 16px; z-index: 50;
}
.modal {
  background: var(--card); border-radius: 12px; border: 1px solid var(--hairline);
  width: 100%; max-width: 520px; max-height: 84vh; overflow-y: auto;
  padding: 20px;
}
.modal h3 { font-family: var(--font-display); margin: 0 0 6px; font-size: 18px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; }
.subj-pick { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 8px; }
.subj-pick button { border: 1px solid var(--hairline); border-radius: 8px; padding: 10px 6px; background: var(--card); }
.subj-pick button:hover { border-color: var(--accent); }
.subj-pick .sw { display: block; height: 10px; border-radius: 5px; margin-bottom: 6px; }

/* welcome */
.welcome-back { position: fixed; inset: 0; background: rgba(27,26,24,.5); z-index: 60; display: flex; align-items: center; justify-content: center; padding: 16px; }
.welcome { background: var(--card); border-radius: 14px; padding: 28px; max-width: 420px; width: 100%; }
.welcome h2 { font-family: var(--font-display); margin: 0 0 8px; }
.welcome p { color: var(--muted); font-size: 14px; }

@media (max-width: 720px) {
  .cal-day { min-height: 64px; }
  .cal-item { font-size: 10px; }
  .task { gap: 10px; }
  .days-badge { flex-basis: 56px; }
}