:root {
  color-scheme: light;
  --bg: #f4f5f9;
  --surface: #ffffff;
  --surface-2: #eef0f5;
  --text: #1c1e29;
  --muted: #5f6477;
  --border: #dcdfe8;
  --line: #e4e6ee;
  --track: #eceef4;
  --accent: #5865f2;
  --accent-hover: #4752c4;
  --accent-text: #ffffff;
  --free: #1f9d55;
  --overlap-tint: rgb(31 157 85 / 0.16);
  --danger: #c93b3e;
  --ok-bg: #dcf2e5;
  --ok-text: #16633a;
  --radius: 10px;
  --shadow: 0 1px 2px rgb(20 22 40 / 0.06), 0 2px 8px rgb(20 22 40 / 0.04);
  --label-w: 128px;
  --lane-gap: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #131419;
    --surface: #1c1e25;
    --surface-2: #262933;
    --text: #e7e8ee;
    --muted: #9a9fb1;
    --border: #2d303b;
    --line: #30333e;
    --track: #252832;
    --accent: #6b77f5;
    --accent-hover: #7f8af7;
    --free: #2fbf6b;
    --overlap-tint: rgb(47 191 107 / 0.16);
    --danger: #ec6467;
    --ok-bg: #173826;
    --ok-text: #85dca8;
    --shadow: none;
  }
}

@media (max-width: 640px) {
  /* names sit above their bar so the timeline gets the full width */
  :root { --label-w: 0px; --lane-gap: 0px; }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent); }

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 1160px;
  margin: 0 auto;
  padding: 14px 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
}

#who { display: flex; align-items: center; gap: 8px; min-width: 0; }
.who-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 40vw; }

main { max-width: 1160px; margin: 0 auto; padding: 0 16px 48px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  margin-bottom: 16px;
  min-width: 0;
}

h1 { font-size: 24px; line-height: 1.25; margin: 0 0 4px; }
h2 { font-size: 16px; margin: 0 0 10px; }

.muted { color: var(--muted); }
.fine { color: var(--muted); font-size: 13px; margin: 12px 0 0; }
.error { color: var(--danger); }

/* buttons & forms */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.ghost:hover { background: var(--surface-2); }
.btn.small { padding: 4px 10px; font-size: 13px; }
.btn.big { padding: 11px 22px; font-size: 16px; }
.btn:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.link {
  border: 0;
  background: none;
  padding: 0;
  color: var(--accent);
  font: inherit;
  cursor: pointer;
  text-decoration: underline;
}

input {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 10px;
  min-width: 0;
}

/* login */

.login { max-width: 480px; margin: 48px auto; text-align: center; padding: 32px 24px; }
.login .btn.big { margin-top: 12px; }
.dev-login { display: flex; gap: 8px; justify-content: center; margin-top: 16px; flex-wrap: wrap; }

/* intro & best overlaps */

.intro { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; }
.intro-text { flex: 1 1 420px; min-width: 0; }
.intro-text .muted { margin: 0; }
.intro-actions { display: flex; align-items: center; gap: 12px; }
.summary { display: flex; align-items: center; gap: 8px; margin: 10px 0 0; font-size: 14px; color: var(--muted); flex-wrap: wrap; }

.save-status { font-size: 13px; color: var(--muted); }
.save-status.saved { color: var(--ok-text); }
.save-status.error { color: var(--danger); }

.avatar { border-radius: 50%; flex: none; background: var(--surface-2); object-fit: cover; }
.avatars { display: flex; flex: none; }
.avatars .avatar + .avatar { margin-left: -6px; box-shadow: 0 0 0 2px var(--surface); }

.best .muted { margin: 0; }
.best-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px 16px; flex-wrap: wrap; margin-bottom: 10px; }
.best-head h2 { margin: 0; }
.filters { display: flex; flex-wrap: wrap; gap: 4px 12px; }
.best-when .length { font-weight: 400; font-size: 13px; margin-left: 8px; }
.threshold { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; color: var(--muted); }
.threshold select {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 6px;
}
.best-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 8px;
}
.best-list li { padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; min-width: 0; }
.best-when { font-weight: 600; }
.best-who { display: flex; align-items: center; gap: 8px; margin-top: 4px; font-size: 13px; color: var(--muted); min-width: 0; }
.best-who .count {
  flex: none;
  font-weight: 700;
  font-size: 12px;
  padding: 1px 7px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text);
}
.best-who .count.full { background: var(--ok-bg); color: var(--ok-text); }
.names { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* day timelines */

.day { padding: 14px 18px 16px; }
.day.today { border-color: var(--accent); }
.day h2 { display: flex; align-items: baseline; gap: 8px; margin-bottom: 6px; }
.day h2 .date { font-weight: 400; font-size: 14px; }

.day-body { position: relative; display: flex; flex-direction: column; gap: 4px; user-select: none; -webkit-user-select: none; }

.lane { display: grid; grid-template-columns: var(--label-w) minmax(0, 1fr); align-items: center; gap: var(--lane-gap); }
.lane-label {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  font-size: 13px;
  font-weight: 600;
}
.lane-label span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lane.me .lane-label { color: var(--accent); }
.lane-label.toggle { cursor: pointer; }
.lane-label input { margin: 0; flex: none; accent-color: var(--accent); cursor: pointer; }
.lane.off .lane-label { color: var(--muted); }
.lane.off .lane-label span { text-decoration: line-through; }
.lane.off .lane-label .avatar { opacity: 0.4; }
.lane.off .track { opacity: 0.3; }
@media (max-width: 640px) {
  .lane { grid-template-columns: minmax(0, 1fr); }
  .lane-label { font-size: 12px; }
  .lane-label .avatar { width: 16px; height: 16px; }
  .axis-lane .lane-label { display: none; }
  .day-body { gap: 2px; }
}
.overlap-lane .lane-label { color: var(--free); }

.track {
  position: relative;
  height: 24px;
  border-radius: 6px;
  background-color: var(--track);
  /* hour gridlines */
  background-image: repeating-linear-gradient(to right, var(--line) 0 1px, transparent 1px calc(100% / 24));
}

.track.axis { height: 16px; background: none; }
.tick {
  position: absolute;
  left: calc(var(--x) * 100%);
  transform: translateX(-2px);
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}
@media (max-width: 640px) {
  .tick.minor { display: none; }
}

.track.bars { display: grid; grid-template-columns: repeat(48, minmax(0, 1fr)); }
.track.mine { cursor: pointer; touch-action: pan-y; box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--accent) 45%, transparent); }

.cell { min-width: 0; }
.cell.ov { background: var(--overlap-tint); }
.cell.on { background: var(--c); margin: 3px 0; --seam: 1px 0 0 var(--c); --ov-mark: 0 0 transparent; box-shadow: var(--seam), var(--ov-mark); }
.cell.on.s { border-top-left-radius: 5px; border-bottom-left-radius: 5px; margin-left: 1px; }
.cell.on.e { border-top-right-radius: 5px; border-bottom-right-radius: 5px; margin-right: 1px; --seam: 0 0 transparent; }
.cell.on.ov { --ov-mark: inset 0 -3px 0 var(--free); }
.cell.past { background: repeating-linear-gradient(135deg, transparent 0 3px, rgb(128 128 140 / 0.14) 3px 5px); }
.cell.past.on { background: color-mix(in oklab, var(--c) 45%, var(--track)); }
.track.mine .cell.past { cursor: not-allowed; }

.track.overlap { background-color: transparent; border: 1px dashed var(--line); }
.seg {
  position: absolute;
  top: 2px;
  bottom: 2px;
  left: calc(var(--x) * 100%);
  width: calc(var(--w) * 100%);
  border-radius: 4px;
  background: color-mix(in oklab, var(--free) calc(45% + var(--k) * 55%), var(--track));
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  line-height: 18px;
  text-align: center;
  overflow: hidden;
  white-space: nowrap;
}
.seg.all { box-shadow: 0 0 0 1px var(--free); }

.now-line {
  position: absolute;
  top: 18px;
  bottom: 0;
  left: calc(var(--label-w) + var(--lane-gap) + (100% - var(--label-w) - var(--lane-gap)) * var(--now));
  width: 2px;
  margin-left: -1px;
  background: var(--danger);
  border-radius: 1px;
  pointer-events: none;
}

.tooltip {
  position: fixed;
  z-index: 10;
  max-width: 280px;
  padding: 6px 10px;
  border-radius: 8px;
  background: var(--text);
  color: var(--bg);
  font-size: 13px;
  line-height: 1.4;
  pointer-events: none;
  box-shadow: 0 4px 16px rgb(0 0 0 / 0.2);
}