/* Desktop first: proposing times happens on a week grid that wants width.
   Everything else is a column of forms that narrows cleanly on a phone, which
   is where a responder is likely to be. */

:root {
  --bg: #0f1216;
  --surface: #171c22;
  --surface-2: #1f262e;
  --line: #2a333d;
  --text: #e8edf2;
  --muted: #8c9aa8;
  --accent: #4d9fff;
  --accent-ink: #06121f;
  --good: #38c172;
  --danger: #e5484d;
  --radius: 12px;
  --tap: 40px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f7fa;
    --surface: #ffffff;
    --surface-2: #eef1f5;
    --line: #d5dce4;
    --text: #141a21;
    --muted: #5d6b79;
    --accent: #1f6fd6;
    --accent-ink: #ffffff;
    --good: #1e8a4c;
    --danger: #c9302c;
  }
}

* { box-sizing: border-box; }

/* Flex and grid classes would otherwise beat the attribute. */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { margin: 0; font-weight: 650; }

.wrap { padding: 24px 20px 40px; max-width: 960px; margin: 0 auto; }
.narrow { padding: 48px 20px; max-width: 420px; margin: 0 auto; }
.page-title { font-size: 26px; margin-bottom: 16px; }
.sec { font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0 0 10px; }
.muted { color: var(--muted); font-size: 14px; }
.hint { display: block; color: var(--muted); font-size: 14px; font-weight: 400; margin: 6px 0 12px; }
.error { color: var(--danger); font-size: 14px; margin: 0; }
.ok { color: var(--good); font-size: 14px; margin: 0; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 14px; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  margin: 0 0 16px;
}

.empty-state { color: var(--muted); padding: 24px 0; }
.empty-state p { margin: 0 0 6px; }
.empty-state strong { color: var(--text); }

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

.topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 20px;
  height: 56px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.topbar .brand { font-weight: 700; color: var(--text); letter-spacing: .02em; }
.topbar nav { display: flex; gap: 4px; flex: 1; overflow-x: auto; }
.topbar nav a { color: var(--muted); padding: 6px 10px; border-radius: 8px; white-space: nowrap; }
.topbar nav a:hover { color: var(--text); text-decoration: none; }
.topbar nav a.on { color: var(--text); background: var(--surface-2); }
.topbar form { margin: 0; }

/* ---------- forms ---------- */

.stack { display: flex; flex-direction: column; gap: 12px; }
.stack label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; font-weight: 600; }
.stack .hint { margin: 0; }

input, select {
  font: inherit;
  min-height: var(--tap);
  padding: 0 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--text);
  width: 100%;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
select { width: auto; }
.stack label input { font-weight: 400; }

button {
  font: inherit;
  min-height: var(--tap);
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--text);
  padding: 0 14px;
  cursor: pointer;
}
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 650; }
button.danger { color: var(--danger); }
button.sm { min-height: 30px; padding: 0 10px; font-size: 14px; }
button.link { background: none; border: none; color: var(--muted); padding: 0; min-height: 0; }
button.link:hover { color: var(--text); }
.stack button { align-self: flex-start; }

.copy-row { display: flex; gap: 8px; }
.copy-row input { flex: 1; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; }
pre.example { margin: 0 0 12px; padding: 8px 12px; border-radius: 10px; background: var(--bg); border: 1px solid var(--line); overflow-x: auto; white-space: pre; }
.add-token { margin-top: 14px; }
.add-token input { flex: 1; min-width: 200px; }
.sec-row { margin-top: 8px; }
.sec-row .sec { margin: 0; }

/* ---------- lists ---------- */

.list { list-style: none; padding: 0; margin: 16px 0 0; }
.list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.list li > :first-child { flex: 1; }

.new-invite { margin-top: 16px; }
.new-invite p { margin: 0 0 10px; }

.row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.warn { color: #c98a1a; font-size: 14px; margin: 4px 0 0; }
.stack label.check { flex-direction: row; flex-wrap: wrap; align-items: center; gap: 8px; }
.stack label.check .hint { flex-basis: 100%; }
input[type=checkbox] { width: auto; min-height: 0; }
input[type=file] { padding: 8px; }

/* ---------- calendars ---------- */

.cal-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.cal-head form { margin: 0; }
.cal .status { margin: 8px 0 0; }
.cal details { margin-top: 10px; }
.cal summary { cursor: pointer; color: var(--muted); font-size: 14px; }
.cal details .stack { margin-top: 12px; }
.upload-again, .upload { margin-top: 16px; }
.connect-then { margin-top: 16px; }
details.caldav { margin-top: 16px; }
details.caldav summary { cursor: pointer; color: var(--muted); font-size: 14px; }
details.caldav .stack { margin-top: 12px; }
.add-share { margin-top: 14px; }
.or { margin: 0; text-align: center; }
.passkey-login { margin-bottom: 16px; }
.banner + .banner { margin-top: 8px; }
.banners { margin-bottom: 16px; }
.add-share input { flex: 1; min-width: 200px; }

/* ---------- the week ---------- */

:root {
  --slot: 10px; /* one 15-minute slot */
  --p0: #4d9fff;
  --p1: #e0803a;
  --p2: #38c172;
  --p3: #b36bdc;
  --p4: #e5484d;
  --p5: #23b5b5;
}

.week { margin-top: 8px; }
.week-nav { display: flex; align-items: center; gap: 14px; margin-bottom: 10px; flex-wrap: wrap; }
.week-nav a[aria-label] { font-size: 22px; line-height: 1; padding: 0 6px; }
.week-nav .tz { margin-left: auto; }

.legend { display: flex; gap: 16px; margin: 0 0 10px; font-size: 14px; }
.legend .key::before {
  content: "";
  display: inline-block;
  width: 12px; height: 12px;
  border-radius: 3px;
  margin-right: 6px;
  vertical-align: -1px;
  background: var(--c);
}
.legend .key.tent::before { background: repeating-linear-gradient(135deg, var(--muted) 0 3px, transparent 3px 6px); border: 1px solid var(--muted); }

.week-scroll {
  position: relative;
  max-height: 620px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.week-grid { display: grid; grid-template-columns: 52px repeat(7, minmax(70px, 1fr)); }
.week-grid .corner, .week-grid .dayhead {
  position: sticky; top: 0; z-index: 2;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 8px 6px;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}
.week-grid .dayhead.today { color: var(--accent); font-weight: 650; }

.hours { display: grid; grid-template-rows: repeat(24, calc(var(--slot) * 4)); }
.hours span { font-size: 11px; color: var(--muted); text-align: right; padding-right: 6px; transform: translateY(-6px); }
.hours span:first-child { visibility: hidden; }

.day {
  display: grid;
  grid-template-rows: repeat(96, var(--slot));
  column-gap: 2px;
  padding: 0 2px;
  border-left: 1px solid var(--line);
  /* an hour line every four slots */
  background: repeating-linear-gradient(to bottom, var(--line) 0 1px, transparent 1px calc(var(--slot) * 4));
}
.day.today { background-color: color-mix(in srgb, var(--accent) 5%, transparent); }

.blk {
  border-radius: 4px;
  background: color-mix(in srgb, var(--c) 70%, transparent);
  border-left: 3px solid var(--c);
  overflow: hidden;
  font-size: 11px;
  line-height: 1.2;
  padding: 1px 4px;
  color: var(--text);
}
.blk.tent { background: repeating-linear-gradient(135deg, color-mix(in srgb, var(--c) 55%, transparent) 0 4px, transparent 4px 8px); }

.p0 { --c: var(--p0); }
.p1 { --c: var(--p1); }
.p2 { --c: var(--p2); }
.p3 { --c: var(--p3); }
.p4 { --c: var(--p4); }
.p5 { --c: var(--p5); }

/* ---------- proposals ---------- */

.crumb { margin: 0 0 8px; font-size: 14px; }
.push { margin-left: auto; }
.new-proposal { margin-bottom: 8px; }
.new-proposal input { flex: 1; min-width: 220px; }
.props li { flex-wrap: wrap; }
.props li > a { flex: 1; font-weight: 600; }

.badge { font-size: 12px; border-radius: 999px; padding: 2px 9px; background: var(--surface-2); color: var(--muted); border: 1px solid var(--line); white-space: nowrap; }
.badge.sent, .badge.st-pending { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.badge.closed { color: var(--muted); }
.badge.draft { color: #c98a1a; border-color: color-mix(in srgb, #c98a1a 40%, transparent); }
.badge.st-approved { color: var(--good); border-color: color-mix(in srgb, var(--good) 45%, transparent); }
.badge.st-denied { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 45%, transparent); }

.details { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; }
.details .title-input { font-size: 24px; font-weight: 650; border-color: transparent; background: transparent; padding: 0 6px; margin-left: -6px; }
.details .title-input:hover, .details .title-input:focus { border-color: var(--line); background: var(--surface); }
textarea {
  font: inherit;
  width: 100%;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--text);
  resize: vertical;
}
textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.state { margin-bottom: 16px; }
.state form { margin: 0; }
.banner { background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 14px; }
.desc { white-space: pre-wrap; margin: 6px 0 14px; }
#responder details { margin-top: 12px; }
#responder summary { cursor: pointer; color: var(--muted); font-size: 14px; }
#responder .pick { margin-top: 10px; }
#responder .pick input { flex: 1; min-width: 200px; }
#responder .new-invite { margin: 10px 0; }
#responder form { margin: 0 0 8px; }

.opts { list-style: none; padding: 0; margin: 8px 0 24px; }
.opt-row { display: flex; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.opt-row .when { font-weight: 600; min-width: 210px; }
.opt-row .note { color: var(--muted); font-size: 14px; flex-basis: 100%; white-space: pre-wrap; }
.opt-row .note::before { content: "“"; }
.opt-row .note::after { content: "”"; }
.opt-row form.push { margin: 0 0 0 auto; }

.opt-row.resp { display: block; }
.opt-row.resp form { display: flex; flex-direction: column; gap: 8px; }
.resp-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.choices { display: flex; gap: 6px; margin-left: auto; }
.choice { min-width: 96px; }
.choice.approve.on { background: var(--good); border-color: var(--good); color: #fff; }
.choice.deny.on { background: var(--danger); border-color: var(--danger); color: #fff; }
.opt-row.resp.st-approved .when { color: var(--good); }
.opt-row.resp.st-denied .when { color: var(--danger); }
.opt-row.resp textarea { min-height: 38px; }
button:disabled { opacity: .5; cursor: not-allowed; }

/* Proposed times over the busy lanes: they span every lane. */
.opt {
  grid-column: 1 / -1;
  z-index: 1;
  position: relative;
  border: 2px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 18%, var(--surface));
  border-radius: 6px;
  font-size: 11px;
  line-height: 1.2;
  padding: 1px 4px;
  overflow: hidden;
  color: var(--text);
}
.opt a { color: inherit; display: block; }
.opt.st-approved { border-color: var(--good); background: color-mix(in srgb, var(--good) 22%, var(--surface)); }
.opt.st-denied { border-color: var(--danger); background: repeating-linear-gradient(135deg, color-mix(in srgb, var(--danger) 18%, var(--surface)) 0 4px, var(--surface) 4px 8px); }
.planner .blk { opacity: .55; }

.editable .day { cursor: crosshair; user-select: none; -webkit-user-select: none; touch-action: pan-y; }
.editable .opt { cursor: default; }
.opt .h-top, .opt .h-bot { position: absolute; left: 0; right: 0; height: 6px; cursor: ns-resize; }
.opt .h-top { top: -2px; }
.opt .h-bot { bottom: -2px; }
.opt .h-top:hover, .opt .h-bot:hover { background: color-mix(in srgb, var(--accent) 50%, transparent); }
.opt .opt-x { position: absolute; top: 0; right: 0; margin: 0; }
.opt .opt-x button { min-height: 0; padding: 0 5px; border: 0; background: transparent; color: var(--muted); font-size: 14px; line-height: 1.2; }
.opt .opt-x button:hover { color: var(--danger); }
.opt.ghost { border-style: dashed; z-index: 3; pointer-events: none; background: color-mix(in srgb, var(--accent) 30%, transparent); }
.opt.resizing { opacity: .3; }

/* The text box under a proposal: the exports, and text in. */
.text-box { margin-top: 24px; }
.text-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.text-head .sec { margin: 0; }
.text-head .exports { margin-left: auto; gap: 12px; font-size: 14px; }
.text-box textarea { white-space: pre; overflow-x: auto; }