:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --card: #ffffff;
  --ink: #14181d;
  --ink-soft: #5c6672;
  --line: #dde2e8;
  --accent: #1f6feb;
  --accent-ink: #ffffff;
  --free-bg: #ffffff;
  --free-line: #c9d4e2;
  --taken-bg: #eef0f3;
  --taken-ink: #9aa3ae;
  --yours-bg: #12703a;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 32px 20px 64px;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main { max-width: 980px; margin: 0 auto; }

.page-head { margin-bottom: 20px; }
h1 { font-size: clamp(20px, 3.4vw, 27px); margin: 0 0 6px; letter-spacing: -0.01em; }
.lede { margin: 0; color: var(--ink-soft); max-width: 62ch; }
time { font-weight: 600; color: var(--ink); }

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

label { display: block; font-weight: 600; font-size: 13px; margin-bottom: 6px; }

input[type="text"] {
  width: 100%;
  max-width: 420px;
  font: inherit;
  padding: 9px 11px;
  border: 1px solid var(--free-line);
  border-radius: 8px;
  background: #fff;
  color: inherit;
}
input[type="text"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}
input.invalid { border-color: #c9372c; background: #fff7f6; }

.hint { margin: 8px 0 0; font-size: 13px; color: var(--ink-soft); }

/* ---- your booking ---- */
.card.mine { border-color: #b4d8c0; background: #f2fbf5; }
/* The admin narrowed the schedule and this booking no longer has a slot. */
.card.mine.stranded { border-color: #ecd9a0; background: #fff8e6; }
.card.mine.stranded .mine-eyebrow { color: #8a6410; }
.card.mine.stranded .mine-slot { text-decoration: line-through; color: var(--ink-soft); }
.mine-body {
  display: flex; flex-wrap: wrap; gap: 16px;
  align-items: center; justify-content: space-between;
}
.mine-eyebrow {
  margin: 0; font-size: 11px; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: #1d6b3c;
}
.mine-slot { margin: 2px 0 0; font-size: 22px; font-variant-numeric: tabular-nums; }
.mine-slot span { font-size: 15px; color: var(--ink-soft); font-weight: 500; }
.mine-name { margin: 2px 0 0; color: var(--ink-soft); font-size: 14px; }
.mine-actions { text-align: right; }
.mine-actions .hint { margin: 0 0 8px; }

.btn-ghost {
  font: inherit; font-weight: 600; cursor: pointer;
  padding: 7px 13px; border-radius: 8px;
  border: 1px solid #d9b3b3; background: #fff; color: #a3312a;
}
.btn-ghost:hover:not(:disabled) { background: #fff2f1; }
.btn-ghost:disabled { opacity: .5; cursor: not-allowed; }

/* ---- banner ---- */
.banner {
  border-radius: var(--radius); padding: 11px 14px; margin-bottom: 16px;
  font-weight: 500; border: 1px solid transparent;
}
.banner.error { background: #fdeceb; border-color: #f0b8b3; color: #8f2018; }
.banner.info { background: #eaf2fd; border-color: #b8d1f5; color: #1a4c9b; }
.banner.success { background: #eaf7ee; border-color: #b6e0c2; color: #1d5c31; }

/* ---- grids ---- */
.grids {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
.loading { color: var(--ink-soft); grid-column: 1 / -1; }

.track {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px 18px 18px;
}
.track h2 {
  font-size: 15px; margin: 0 0 2px;
  display: flex; gap: 8px; align-items: baseline; justify-content: space-between;
}
.track .avail { font-weight: 400; font-size: 13px; color: var(--ink-soft); }
.track .hours {
  margin: 0; font-size: 13px; font-weight: 600; color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.track .note { margin: 6px 0 0; font-size: 13px; color: var(--ink-soft); }
.empty-track {
  margin: 12px 0 0; padding: 12px; border-radius: 8px; font-size: 13px;
  color: var(--ink-soft); background: var(--taken-bg); text-align: center;
}

.slots {
  display: grid; gap: 7px;
  grid-template-columns: repeat(auto-fill, minmax(74px, 1fr));
  margin-top: 12px;
}

.slot {
  font: inherit; font-variant-numeric: tabular-nums; font-weight: 600;
  padding: 9px 4px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--free-line); background: var(--free-bg); color: var(--ink);
  transition: background .12s, border-color .12s, transform .06s;
}
.slot:hover:not(:disabled) { border-color: var(--accent); background: #f2f7ff; }
.slot:active:not(:disabled) { transform: translateY(1px); }
.slot:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.slot[data-state="taken"],
.slot[data-state="past"] {
  background: var(--taken-bg); color: var(--taken-ink);
  border-color: var(--taken-bg); cursor: not-allowed;
  text-decoration: line-through; text-decoration-thickness: 1px;
}
.slot[data-state="past"] { text-decoration: none; opacity: .75; }

.slot[data-state="mine"] {
  background: var(--yours-bg); border-color: var(--yours-bg);
  color: #fff; cursor: default;
}
.slot[data-state="mine"]::after { content: " ✓"; }
.slot:disabled { pointer-events: none; }

/* ---- confirmation dialog ---- */
.confirm {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 24px 18px;
  max-width: 420px;
  width: calc(100% - 32px);
  background: var(--card);
  color: var(--ink);
  box-shadow: 0 18px 48px rgba(15, 22, 32, .22);
}
.confirm::backdrop { background: rgba(15, 22, 32, .45); }

.confirm h2 { margin: 0 0 14px; font-size: 17px; letter-spacing: -0.01em; }
.confirm-slot {
  margin: 0; font-size: 28px; font-weight: 700;
  font-variant-numeric: tabular-nums; line-height: 1.15;
}
.confirm-slot span {
  display: block; font-size: 14px; font-weight: 500;
  color: var(--ink-soft); margin-top: 2px;
}
.confirm-name { margin: 10px 0 0; font-size: 15px; }
.confirm-note { margin: 12px 0 0; font-size: 13px; color: var(--ink-soft); }

.confirm-actions {
  display: flex; gap: 10px; justify-content: flex-end;
  margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line);
}
.btn-primary, .btn-quiet {
  font: inherit; font-weight: 600; cursor: pointer;
  padding: 10px 18px; border-radius: 9px;
}
.btn-primary {
  border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink);
}
.btn-primary:hover { background: #1a5fd0; border-color: #1a5fd0; }
.btn-primary.danger { background: #b3261e; border-color: #b3261e; }
.btn-primary.danger:hover { background: #9b1f18; border-color: #9b1f18; }
.btn-quiet {
  border: 1px solid var(--free-line); background: #fff; color: var(--ink-soft);
}
.btn-quiet:hover { background: #f4f6f8; color: var(--ink); }
.btn-primary:focus-visible, .btn-quiet:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

@media (max-width: 420px) {
  .confirm-actions { flex-direction: column-reverse; }
  .confirm-actions button { width: 100%; }
}

/* ---- legend + footer ---- */
.legend {
  display: flex; flex-wrap: wrap; gap: 16px;
  margin: 18px 0 0; font-size: 13px; color: var(--ink-soft);
}
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.sw {
  width: 13px; height: 13px; border-radius: 4px;
  border: 1px solid var(--free-line); background: #fff;
}
.sw.taken { background: var(--taken-bg); border-color: var(--taken-bg); }
.sw.yours { background: var(--yours-bg); border-color: var(--yours-bg); }
.sw.past { background: var(--taken-bg); border-color: var(--taken-bg); opacity: .6; }

.page-foot { margin-top: 22px; color: var(--ink-soft); font-size: 13px; }
.page-foot p { margin: 0 0 4px; }

@media (max-width: 520px) {
  body { padding: 20px 14px 48px; }
  .mine-actions { text-align: left; }
}