:root {
  --bg: #f6f6f4;
  --surface: #ffffff;
  --border: #e5e5e1;
  --text: #1c1c1a;
  --muted: #6b6f76;
  --faint: #b7bac0;
  --booked-bg: #e3f3e8; --booked-text: #1b6b3a; --booked-border: #bfe3cd;
  --pending-bg: #eef0f2; --pending-text: #5c6571; --pending-border: #e2e5e9;
  --blocked-bg: #fce9cf; --blocked-text: #8a5300; --blocked-border: #f3d39a;
  --accent: #2f6fed; --accent-bg: #e6efff;
  --danger-text: #8a5300; --danger-border: #e0a23a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1d20; --surface: #26282c; --border: #34373c;
    --text: #e7e7e7; --muted: #a3a9b3; --faint: #6b6f77;
    --booked-bg: #173a26; --booked-text: #7fd6a1; --booked-border: #235c3c;
    --pending-bg: #2a2d33; --pending-text: #aab2bd; --pending-border: #3a3e45;
    --blocked-bg: #3a2c12; --blocked-text: #f0b860; --blocked-border: #5c4516;
    --accent: #5a8cff; --accent-bg: #1e2b48;
    --danger-text: #f0b860; --danger-border: #6b521c;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.app { max-width: 880px; margin: 0 auto; padding: 24px 16px 64px; }

.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
h1 { font-size: 20px; font-weight: 600; margin: 0; }
.nav { display: flex; align-items: center; gap: 8px; }
.month-label { min-width: 130px; text-align: center; font-weight: 500; font-size: 15px; }
.iconbtn {
  width: 34px; height: 34px; padding: 0; font-size: 18px; line-height: 1;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; cursor: pointer;
}
.iconbtn:hover { background: var(--bg); }

.legend { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin: 14px 0 6px; font-size: 13px; color: var(--muted); }
.legend .hint { color: var(--faint); }
.dot { display: inline-block; width: 11px; height: 11px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }
.dot.booked { background: var(--booked-text); }
.dot.pending { background: var(--pending-text); }
.dot.blocked { background: var(--blocked-text); }

.status-msg { margin: 12px 0; padding: 10px 12px; background: var(--pending-bg); color: var(--pending-text); border-radius: 8px; font-size: 14px; }

.calendars { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin-top: 8px; }
.col { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px; }
.col-head { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.avatar { width: 26px; height: 26px; border-radius: 50%; background: var(--accent-bg); color: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 600; }
.col-name { font-weight: 600; }
.col-error { font-size: 13px; color: var(--blocked-text); background: var(--blocked-bg); border-radius: 8px; padding: 6px 10px; margin-bottom: 10px; }

.selbar { display: flex; align-items: center; justify-content: space-between; gap: 8px; background: var(--accent-bg); color: var(--accent); border-radius: 8px; padding: 6px 10px; margin-bottom: 10px; font-size: 13px; }
.selbar button { font-size: 12px; margin-left: 6px; }

.grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.dow { font-size: 11px; color: var(--faint); text-align: center; padding-bottom: 2px; }
.cell { aspect-ratio: 1 / 1; display: flex; align-items: center; justify-content: center; font-size: 13px; border-radius: 8px; user-select: none; }
.cell.blank { background: transparent; }
.cell.disabled { color: var(--faint); }
.cell.work { cursor: pointer; border: 1px solid var(--border); }
.cell.booked { background: var(--booked-bg); color: var(--booked-text); border-color: var(--booked-border); }
.cell.pending { background: var(--pending-bg); color: var(--pending-text); border-color: var(--pending-border); }
.cell.blocked { background: var(--blocked-bg); color: var(--blocked-text); border-color: var(--blocked-border); }
.cell.selected { outline: 2px solid var(--accent); outline-offset: -2px; }

button {
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 6px 12px; font-size: 14px; cursor: pointer;
}
button:hover { background: var(--bg); }
button.danger { color: var(--danger-text); border-color: var(--danger-border); }

.overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.4); display: flex; align-items: center; justify-content: center; padding: 16px; }
.overlay[hidden] { display: none; }
.modal { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 20px; width: 100%; max-width: 320px; }
.modal-title { font-size: 16px; font-weight: 600; margin: 0 0 8px; }
.modal-body { font-size: 14px; color: var(--muted); margin: 0 0 12px; }
.modal-note { font-size: 12px; color: var(--faint); margin: 0 0 18px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; }