:root {
  --bg: #f6f3ec;
  --card: #ffffff;
  --ink: #21313c;
  --muted: #5b6a74;
  --accent: #0e7c7b;
  --accent-dark: #0a5b5a;
  --ok: #bde8c8;
  --warn: #ffd9d9;
  --blocked: #d9dee3;
  --line: #d8dee5;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top, #ffffff, var(--bg) 55%);
}

.container {
  width: min(1160px, 92%);
  margin: 0 auto;
}

.site-header,
.site-footer {
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 0.9rem 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  border-bottom: 0;
  margin-top: 2rem;
}

.hero h1 {
  margin: 1.4rem 0 0.6rem;
}

.hero p {
  margin-top: 0;
}

.apartments {
  display: grid;
  gap: 1rem;
  margin: 1.2rem 0 2rem;
}

.apartment-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
}

.apartment-card h2 {
  margin: 0;
}

.muted {
  color: var(--muted);
}

.calendar-toolbar {
  margin: 0.7rem 0 1rem;
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  align-items: end;
}

label {
  display: block;
  margin-bottom: 0.25rem;
}

select,
input,
button {
  font: inherit;
}

select,
input {
  padding: 0.45rem 0.55rem;
  border: 1px solid #bcc9d5;
  border-radius: 8px;
}

.shift-btn,
.book-btn,
button[type="submit"] {
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
}

.shift-btn:hover,
.book-btn:hover,
button[type="submit"]:hover {
  background: var(--accent-dark);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.months-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(250px, 1fr));
  gap: 0.8rem;
}

.month {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.6rem;
  background: #fcfdff;
}

.month h3 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
}

.weekdays,
.days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.2rem;
}

.weekdays span {
  text-align: center;
  font-size: 0.78rem;
  color: var(--muted);
}

.day {
  border: 1px solid #ccd8e3;
  border-radius: 6px;
  background: #fff;
  min-height: 30px;
}

.day.filler {
  border: 0;
  background: transparent;
}

.day.blocked {
  background: var(--blocked);
}

.day.selected {
  border-color: #117868;
  box-shadow: inset 0 0 0 2px #117868;
}

.day.selected-range {
  background: var(--ok);
}

.day.invalid-range {
  background: var(--warn);
}

.selection-line {
  min-height: 1.2rem;
  margin: 0.2rem 0 0.8rem;
}

.booking-form {
  margin-top: 0.9rem;
}

.auth-wrap {
  max-width: 460px;
  margin-top: 2rem;
}

.auth-wrap form {
  display: grid;
  gap: 0.65rem;
}

.msg-error {
  color: #9d1e1e;
}

.msg-success {
  color: #136a2a;
}

.bookings-table {
  width: 100%;
  border-collapse: collapse;
}

.bookings-table th,
.bookings-table td {
  border: 1px solid var(--line);
  padding: 0.45rem;
  text-align: left;
}

@media (max-width: 980px) {
  .months-grid {
    grid-template-columns: 1fr;
  }
}