:root {
  --navy: #1b3a5c;
  --accent: #2e5c8a;
  --border: #d7e0ea;
  --free: #ffffff;
  --confirmed: #bfe3c8;
  --confirmed-border: #3f9457;
  --hold: #ffe1b3;
  --hold-border: #c98a2b;
  --group-bg: #f3f6fa;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: #222;
  background: #fafbfc;
}

.screen { min-height: 100vh; }

/* --- Login --- */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-box {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: 300px;
  text-align: center;
  box-shadow: 0 4px 18px rgba(27, 58, 92, 0.08);
}
.login-box h1 { color: var(--navy); margin: 0 0 4px; font-size: 22px; }
.login-box .hint { color: #777; margin: 0 0 18px; font-size: 13px; }
.login-box input {
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}
.login-box button {
  width: 100%;
  padding: 10px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
}
.login-box button:hover { background: var(--navy); }
.error { color: #b23a55; font-size: 13px; min-height: 16px; margin: 8px 0 0; }

/* --- Topbar --- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 5;
}
.topbar h1 { font-size: 18px; color: var(--navy); margin: 0; }
.topbar-controls { display: flex; align-items: center; gap: 10px; }
.topbar-controls button {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 14px;
}
.topbar-controls button:hover { background: var(--group-bg); }
.topbar-controls button.secondary { color: #b23a55; border-color: #f0c6cf; }
.month-label { font-weight: 600; color: var(--navy); min-width: 150px; text-align: center; }

/* --- Grid --- */
.grid-wrap { overflow-x: auto; padding: 16px 20px; }
.grid { border-collapse: collapse; border: 1px solid var(--border); background: #fff; }
.grid .row { display: flex; }
.grid .cell {
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  flex: 0 0 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  cursor: pointer;
  user-select: none;
}
.grid .cell.free { background: var(--free); }
.grid .cell.confirmed { background: var(--confirmed); border-color: var(--confirmed-border); color: #1d4a2a; }
.grid .cell.hold { background: var(--hold); border-color: var(--hold-border); color: #6b4712; }
.grid .cell.free:hover { background: #eef4fb; }
.grid .cell.head {
  flex: 0 0 34px;
  height: 30px;
  font-weight: 600;
  background: var(--group-bg);
  color: var(--navy);
  cursor: default;
}
.grid .rowlabel {
  flex: 0 0 190px;
  height: 34px;
  display: flex;
  align-items: center;
  padding: 0 10px;
  font-size: 13px;
  background: var(--group-bg);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  position: sticky;
  left: 0;
  z-index: 2;
}
.grid .rowlabel.head {
  height: 30px;
  font-weight: 700;
  color: var(--navy);
  z-index: 3;
}
.grid .rowlabel.house { font-weight: 600; color: var(--navy); }
.grid .rowlabel.domik-first { border-top: 2px solid var(--accent); }
.grid .cell.domik-first { border-top: 2px solid var(--accent); }

/* --- Legend --- */
.legend { display: flex; gap: 18px; padding: 0 20px 20px; font-size: 13px; color: #555; }
.legend-item { display: flex; align-items: center; gap: 6px; }
.swatch { width: 14px; height: 14px; border-radius: 3px; display: inline-block; border: 1px solid var(--border); }
.swatch.free { background: var(--free); }
.swatch.confirmed { background: var(--confirmed); border-color: var(--confirmed-border); }
.swatch.hold { background: var(--hold); border-color: var(--hold-border); }

/* --- Modal --- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(20, 30, 45, 0.45);
  display: flex; align-items: center; justify-content: center; z-index: 10;
}
.modal {
  background: #fff; border-radius: 12px; padding: 24px; width: 360px;
  max-height: 86vh; overflow-y: auto;
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}
.modal h2 { margin-top: 0; font-size: 17px; color: var(--navy); }
.modal label { display: block; font-size: 12.5px; color: #555; margin: 12px 0 4px; }
.modal input, .modal select, .modal textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px;
}
.modal textarea { resize: vertical; min-height: 50px; }
.modal .checkboxes label { display: flex; align-items: center; gap: 8px; font-size: 13.5px; margin: 6px 0; color: #333; }
.modal .checkboxes input { width: auto; }
.modal .actions { display: flex; gap: 10px; margin-top: 18px; }
.modal button {
  flex: 1; padding: 9px; border-radius: 7px; border: none; font-size: 14px; cursor: pointer;
}
.modal .btn-primary { background: var(--accent); color: #fff; }
.modal .btn-primary:hover { background: var(--navy); }
.modal .btn-danger { background: #fbe4e8; color: #a5203c; }
.modal .btn-danger:hover { background: #f6c9d1; }
.modal .btn-cancel { background: #eee; color: #444; }
.modal .modal-error { color: #b23a55; font-size: 13px; margin-top: 10px; min-height: 16px; }
.modal .badge {
  display: inline-block; font-size: 11px; padding: 2px 8px; border-radius: 20px;
  background: var(--group-bg); color: var(--navy); margin-left: 6px;
}