/* Layout: one narrow phone-first column; multi-select calendar, then one card per picked date. Copied from the approved mock (2026-10-24). */
:root {
  --paper: #ffffff;
  --mist: #eef4fa;
  --ink: #13243b;
  --ink-soft: #56687d;
  --line: #dbe5ef;
  --signal: #2867e8;
  --signal-dark: #174bb7;
  --signal-pale: #eaf1ff;
  --on-signal: #ffffff;
  --success: #16815d;
  --success-pale: #e5f4ee;
  --error: #c4314b;
  --shadow: 0 18px 48px rgba(30, 61, 96, 0.10);
  --font: "Avenir Next", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #16212f; --mist: #0e1621; --ink: #e6eef7; --ink-soft: #9fb0c3; --line: #2a394b;
    --signal: #6b9bff; --signal-dark: #9dbcff; --signal-pale: #1c2c47; --on-signal: #0e1621;
    --success: #5fd0a4; --success-pale: #133229; --error: #ff8a9b;
    --shadow: 0 18px 48px rgba(0, 0, 0, 0.35); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #16212f; --mist: #0e1621; --ink: #e6eef7; --ink-soft: #9fb0c3; --line: #2a394b;
  --signal: #6b9bff; --signal-dark: #9dbcff; --signal-pale: #1c2c47; --on-signal: #0e1621;
  --success: #5fd0a4; --success-pale: #133229; --error: #ff8a9b;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.35); color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: var(--mist);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
button, input { font: inherit; color: inherit; }
button { cursor: pointer; -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--signal); outline-offset: 2px; }

.page {
  max-width: 480px;
  margin: 0 auto;
  padding-block: 20px 48px;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  display: grid;
  gap: 16px;
}
header { display: grid; gap: 4px; padding-inline: 4px; }
.brand { font-size: 12px; letter-spacing: 0.14em; font-weight: 700; color: var(--signal); }
h1 { margin: 0; font-size: 24px; line-height: 1.35; text-wrap: balance; }
.lead { margin: 0; color: var(--ink-soft); font-size: 14.5px; }

.card {
  background: var(--paper);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 20px;
  display: grid;
  gap: 22px;
}
form.card { gap: 26px; }
.field { display: grid; gap: 10px; }
.label { font-weight: 700; font-size: 15px; display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
.tag { font-size: 11.5px; font-weight: 700; padding: 1px 8px; border-radius: 99px; letter-spacing: 0.04em; }
.tag.req { background: var(--signal-pale); color: var(--signal-dark); }
.tag.opt { background: var(--mist); color: var(--ink-soft); }
.hint { font-size: 13px; color: var(--ink-soft); margin: 0; }
.err { font-size: 13px; color: var(--error); margin: 0; font-weight: 600; }

input[type="text"] {
  width: 100%;
  padding: 13px 14px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
  font-size: 17px;
}
input[type="text"]:focus { border-color: var(--signal); outline: none; box-shadow: 0 0 0 3px var(--signal-pale); }
input.invalid { border-color: var(--error); }

/* Calendar (multi-select) */
.cal { display: grid; gap: 8px; }
.cal-head { display: flex; align-items: center; justify-content: space-between; }
.cal-month { font-weight: 700; font-variant-numeric: tabular-nums; }
.cal-nav {
  width: 40px; height: 40px; border-radius: 10px; border: 1.5px solid var(--line);
  background: var(--paper); font-size: 18px; line-height: 1;
}
.cal-nav:disabled { opacity: 0.35; cursor: default; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; text-align: center; }
.dow { font-size: 12px; color: var(--ink-soft); font-weight: 700; padding-bottom: 2px; }
.dow.sun, .day.sun { color: var(--error); }
.dow.sat, .day.sat { color: var(--signal); }
.day {
  aspect-ratio: 1; max-width: 100%;
  border: 0; border-radius: 10px; background: transparent;
  font-size: 15px; font-variant-numeric: tabular-nums;
}
.day:hover:not(:disabled) { background: var(--signal-pale); }
.day:disabled { color: var(--line); cursor: default; }
.day.today { box-shadow: inset 0 0 0 1.5px var(--line); }
.day.sel, .day.sel.sun, .day.sel.sat { background: var(--signal); color: var(--on-signal); font-weight: 700; }
.count { font-size: 14px; font-weight: 700; color: var(--signal-dark); margin: 0; font-variant-numeric: tabular-nums; }

/* Per-date cards */
.dates { display: grid; gap: 10px; }
.dates:empty { display: none; }
.date-card {
  border: 1.5px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}
.date-card.bad { border-color: var(--error); }
.date-head {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 12px 12px 14px;
}
.date-head .toggle {
  flex: 1; min-width: 0;
  display: grid; gap: 2px; text-align: left;
  border: 0; background: none; padding: 0;
}
.date-title { font-weight: 700; font-variant-numeric: tabular-nums; }
.date-sum { font-size: 13.5px; color: var(--ink-soft); font-variant-numeric: tabular-nums; }
.date-sum.ok { color: var(--signal-dark); font-weight: 700; }
.date-sum.missing { color: var(--error); font-weight: 600; }
.icon-btn {
  flex: none; border: 0; background: var(--mist); color: var(--ink-soft);
  border-radius: 8px; padding: 6px 10px; font-size: 13px; font-weight: 700;
}
.date-body { display: grid; gap: 16px; padding: 4px 14px 16px; border-top: 1px solid var(--line); padding-top: 14px; }
.pick { display: grid; gap: 8px; }
.pick-label { font-size: 14px; font-weight: 700; display: flex; gap: 8px; align-items: baseline; }
.periods { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.period {
  padding: 10px 4px;
  border-radius: 10px;
  border: 1.5px solid var(--line);
  background: var(--paper);
  font-weight: 700;
  font-size: 15px;
  display: grid; gap: 0; line-height: 1.3;
}
.period small { font-weight: 500; font-size: 11.5px; color: var(--ink-soft); font-variant-numeric: tabular-nums; }
.period[aria-pressed="true"] { border-color: var(--signal); background: var(--signal-pale); color: var(--signal-dark); }
.period[aria-pressed="true"] small { color: var(--signal-dark); }
.times { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.time {
  padding: 9px 2px;
  border-radius: 8px;
  border: 1.5px solid var(--line);
  background: var(--paper);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
}
.time[aria-pressed="true"] { background: var(--signal); border-color: var(--signal); color: var(--on-signal); font-weight: 700; }
.time:disabled { opacity: 0.35; cursor: default; text-decoration: line-through; }
.add2 {
  border: 1.5px dashed var(--line);
  background: transparent;
  border-radius: 10px;
  padding: 11px;
  font-weight: 700;
  font-size: 14.5px;
  color: var(--signal-dark);
}
.row-between { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.link { border: 0; background: none; color: var(--ink-soft); font-size: 13px; text-decoration: underline; padding: 2px 4px; }
.done-btn {
  justify-self: end;
  border: 0; border-radius: 10px; background: var(--signal-pale); color: var(--signal-dark);
  padding: 9px 18px; font-weight: 700;
}

.submit {
  width: 100%;
  padding: 16px;
  border: 0;
  border-radius: 12px;
  background: var(--signal);
  color: var(--on-signal);
  font-size: 17px;
  font-weight: 700;
}
.submit:hover:not(:disabled) { background: var(--signal-dark); }
.submit:disabled { opacity: 0.6; cursor: default; }
.send-err { text-align: center; }
/* Hidden from people; bots that fill every field reveal themselves. */
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

/* Done view */
.done-mark {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--success-pale); color: var(--success);
  display: grid; place-items: center; font-size: 28px; font-weight: 700;
}
.done-title { margin: 0; font-size: 21px; }
.summary { display: grid; gap: 8px; margin: 0; }
.summary div { display: grid; grid-template-columns: 7.5em 1fr; gap: 8px; }
.summary dt { color: var(--ink-soft); font-size: 14px; font-variant-numeric: tabular-nums; }
.summary dd { margin: 0; font-weight: 700; min-width: 0; font-variant-numeric: tabular-nums; white-space: pre-line; }
.secondary {
  width: 100%; padding: 14px; border-radius: 12px;
  border: 1.5px solid var(--line); background: var(--paper); font-weight: 700;
}

@media (prefers-reduced-motion: no-preference) {
  .day, .time, .period, .submit, .add2 { transition: background-color .15s, border-color .15s, color .15s; }
}
.done-note { margin-top: -12px; }