:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --ink: #1a1d23;
  --muted: #6b7280;
  --line: #e5e7eb;
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --ok: #16a34a;
  --err: #dc2626;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 8px 24px rgba(0, 0, 0, .04);
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 860px; margin: 0 auto; padding: 40px 20px 24px; }
.head { margin-bottom: 22px; }
.head h1 { font-size: 1.7rem; margin: 0 0 4px; }
.sub { color: var(--muted); margin: 0; }
.tzline { color: var(--muted); font-size: .85rem; margin: 10px 0 0; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}
.center { text-align: center; }
.muted { color: var(--muted); }
.hidden { display: none !important; }

/* Picker layout */
.picker { display: grid; grid-template-columns: 240px 1fr; gap: 16px; }
@media (max-width: 640px) { .picker { grid-template-columns: 1fr; } }

.days {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 8px;
  max-height: 460px;
  overflow-y: auto;
}
@media (max-width: 640px) {
  .days { display: flex; gap: 8px; overflow-x: auto; max-height: none; }
}
.day-btn {
  display: block; width: 100%; text-align: left;
  border: 0; background: transparent; cursor: pointer;
  padding: 10px 12px; border-radius: 8px; font: inherit; color: var(--ink);
  white-space: nowrap;
}
.day-btn:hover { background: #f1f5f9; }
.day-btn.active { background: var(--brand); color: #fff; }
.day-btn .dow { font-weight: 600; }
.day-btn .cnt { font-size: .78rem; opacity: .7; }

.times-pane {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}
.times-heading { font-size: 1.05rem; margin: 0 0 14px; }
.times { display: grid; grid-template-columns: repeat(auto-fill, minmax(108px, 1fr)); gap: 10px; }
.time-btn {
  border: 1px solid var(--line); background: #fff; color: var(--brand-dark);
  font: inherit; font-weight: 600; padding: 12px 8px; border-radius: 8px; cursor: pointer;
  transition: border-color .12s, background .12s;
}
.time-btn:hover { border-color: var(--brand); background: #eff4ff; }

/* Form */
form { display: grid; gap: 14px; margin-top: 6px; }
label { display: grid; gap: 6px; font-weight: 600; font-size: .92rem; }
input, textarea {
  font: inherit; padding: 10px 12px; border: 1px solid var(--line);
  border-radius: 8px; background: #fff; color: var(--ink);
}
input:focus, textarea:focus { outline: 2px solid var(--brand); border-color: var(--brand); }
.primary {
  background: var(--brand); color: #fff; border: 0; padding: 12px 16px;
  border-radius: 8px; font: inherit; font-weight: 600; cursor: pointer;
}
.primary:hover { background: var(--brand-dark); }
.primary:disabled { opacity: .6; cursor: default; }
.link { background: none; border: 0; color: var(--brand); cursor: pointer; font: inherit; padding: 0; }
.back { margin-bottom: 12px; }

.chosen {
  background: #f8fafc; border: 1px solid var(--line); border-radius: 8px;
  padding: 12px 14px; margin: 4px 0 14px;
}
.chosen .big { font-weight: 700; font-size: 1.05rem; }
.chosen .small { color: var(--muted); font-size: .85rem; margin-top: 2px; }

.check {
  width: 56px; height: 56px; border-radius: 50%; background: var(--ok); color: #fff;
  font-size: 1.8rem; line-height: 56px; margin: 0 auto 12px;
}
.err { color: var(--err); margin: 0; }
.foot { text-align: center; color: var(--muted); font-size: .8rem; padding: 24px; }

/* Duration picker */
.durationbar { display: flex; align-items: center; padding: 14px 18px; margin-bottom: 16px; }
.durlabel { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: .95rem; }
.durlabel select {
  font: inherit; padding: 8px 12px; border: 1px solid var(--line); border-radius: 8px;
  background: #fff; color: var(--ink); cursor: pointer;
}