:root {
  --bg-top: #fff6ea;
  --bg-bottom: #dfefff;
  --card: #ffffff;
  --ink: #1f2533;
  --muted: #4f5b73;
  --accent: #0a7f6f;
  --accent-strong: #076356;
  --line: #d5dfec;
  --danger: #b3261e;
  --ok: #166534;
  --shadow: 0 16px 30px rgba(42, 69, 110, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Avenir Next", "Trebuchet MS", "Gill Sans", sans-serif;
  background:
    radial-gradient(circle at 12% -8%, rgba(255, 190, 120, 0.35), transparent 36%),
    radial-gradient(circle at 90% 0%, rgba(103, 195, 255, 0.28), transparent 36%),
    linear-gradient(160deg, var(--bg-top), var(--bg-bottom));
  min-height: 100vh;
}

.page-wrap {
  width: min(1160px, 94vw);
  margin: 2rem auto 3rem;
  display: grid;
  gap: 1.2rem;
}

.hero {
  background: linear-gradient(120deg, #ffffff, #f3f8ff 65%, #f7fffc);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.3rem 1.4rem;
  box-shadow: var(--shadow);
}

.hero h1 {
  margin: 0.2rem 0 0.5rem;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

.hero p {
  margin: 0.35rem 0;
  color: var(--muted);
}

.hero-note {
  font-size: 0.92rem;
  font-weight: 600;
}

.eyebrow {
  margin: 0;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: #156f96;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
}

.stat-card h2 {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.stat-number {
  margin: 0.45rem 0 0;
  font-size: clamp(1.15rem, 2.2vw, 1.7rem);
  font-weight: 700;
}

.flash-stack {
  display: grid;
  gap: 0.6rem;
}

.flash {
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
  border: 1px solid;
  font-weight: 600;
}

.flash.error {
  background: #ffe9e8;
  border-color: #f5b0ab;
  color: var(--danger);
}

.flash.success {
  background: #e9f9ee;
  border-color: #b9e4c2;
  color: var(--ok);
}

.panel {
  background: var(--card);
  border-radius: 16px;
  border: 1px solid var(--line);
  padding: 1.1rem 1.2rem;
  box-shadow: var(--shadow);
}

.panel h2 {
  margin-top: 0;
  margin-bottom: 0.8rem;
  font-size: 1.2rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.form-grid-four {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 0.8rem;
}

label {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
}

select,
input,
textarea,
button {
  font: inherit;
}

select,
input,
textarea {
  width: 100%;
  border: 1px solid #c9d6e6;
  border-radius: 10px;
  padding: 0.62rem 0.7rem;
  background: #fbfdff;
  color: var(--ink);
}

textarea {
  resize: vertical;
  min-height: 128px;
}

.helper {
  color: var(--muted);
  font-size: 0.93rem;
}

.room-status {
  font-weight: 700;
}

button {
  border: 0;
  border-radius: 12px;
  background: linear-gradient(120deg, var(--accent), var(--accent-strong));
  color: #fff;
  font-weight: 700;
  padding: 0.72rem 1rem;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.04);
}

button.secondary {
  background: linear-gradient(120deg, #5f6c83, #3f4a61);
}

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

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 960px;
}

th,
td {
  border-bottom: 1px solid #e5edf7;
  padding: 0.58rem 0.5rem;
  text-align: left;
  vertical-align: top;
}

.room-free td {
  background: #eafaf0;
}

.room-booked td {
  background: #ffeceb;
}

th {
  font-size: 0.83rem;
  letter-spacing: 0.01em;
  color: #2f415d;
  background: #f5f9ff;
}

.small {
  color: var(--muted);
  font-size: 0.78rem;
}

@media (max-width: 900px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .form-grid-four {
    grid-template-columns: 1fr;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .page-wrap {
    margin-top: 1.2rem;
  }
}