/* Simple responsive design: desktop view on wide screens, mobile view on phones. */
:root {
  --green: #1a7a3d;
  --green-light: #e5f5ec;
  --red: #c0392b;
  --red-light: #fdeceb;
  --gray: #f4f5f7;
  --border: #dcdfe4;
  --text: #22303c;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: var(--gray);
  font-size: 15px;
}
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.topbar {
  background: var(--green);
  color: #fff;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.topbar .brand { font-weight: 700; font-size: 18px; color: #fff; }
.topbar nav { display: flex; gap: 10px; flex-wrap: wrap; margin-left: auto; align-items: center; }
.topbar nav a { color: #fff; padding: 6px 10px; border-radius: 6px; font-size: 14px; }
.topbar nav a:hover, .topbar nav a.active { background: rgba(255,255,255,.18); text-decoration: none; }
.lang-switch a { border: 1px solid rgba(255,255,255,.5); }

.container { max-width: 1000px; margin: 20px auto; padding: 0 14px; }

/* Cards, forms, tables */
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  margin-bottom: 16px;
}
.card h1, .card h2 { margin-top: 0; font-size: 20px; }
label { display: block; margin: 10px 0 4px; font-weight: 600; font-size: 14px; }
input[type=text], input[type=email], input[type=password], input[type=tel],
input[type=date], input[type=number], select {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 15px;
  background: #fff;
}
.btn {
  display: inline-block;
  background: var(--green);
  color: #fff;
  border: 0;
  border-radius: 7px;
  padding: 10px 18px;
  font-size: 15px;
  cursor: pointer;
  margin-top: 12px;
}
.btn:hover { opacity: .9; }
.btn-sm { padding: 5px 10px; font-size: 13px; margin-top: 0; }
.btn-red { background: var(--red); }
.btn-gray { background: #6b7683; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { background: var(--gray); }

.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 12px; font-size: 14px; }
.flash.success { background: var(--green-light); color: var(--green); border: 1px solid var(--green); }
.flash.error { background: var(--red-light); color: var(--red); border: 1px solid var(--red); }
.flash.info { background: #eaf2fb; color: #1f5c99; border: 1px solid #1f5c99; }

.badge { padding: 3px 8px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge.green { background: var(--green-light); color: var(--green); }
.badge.red { background: var(--red-light); color: var(--red); }
.badge.gray { background: #e8eaee; color: #555; }

/* Club list */
.club-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.club-card { display: flex; gap: 12px; align-items: center; }
.club-card img { width: 52px; height: 52px; border-radius: 10px; object-fit: cover; border: 1px solid var(--border); background:#fff; }
.club-card .meta { font-size: 13px; color: #667; }

/* Slot grid: green = available, red = booked/closed */
.slot-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(86px, 1fr)); gap: 8px; }
.slot {
  padding: 12px 4px;
  border-radius: 8px;
  text-align: center;
  font-weight: 700;
  font-size: 14px;
  border: 1px solid transparent;
}
.slot.free { background: var(--green-light); color: var(--green); border-color: var(--green); cursor: pointer; }
.slot.free:hover { background: var(--green); color: #fff; }
.slot.busy { background: var(--red-light); color: var(--red); border-color: var(--red); cursor: not-allowed; }
.slot.mine { background: var(--green); color: #fff; }
.slot small { display: block; font-weight: 400; font-size: 10px; }
button.slot { width: 100%; font-family: inherit; }

/* OTP input */
.otp-input { letter-spacing: 14px; font-size: 26px; text-align: center; max-width: 220px; }

/* Filter bar */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.filter-bar > div { flex: 1; min-width: 140px; }

.stat-row { display: flex; gap: 12px; flex-wrap: wrap; }
.stat { flex: 1; min-width: 140px; text-align: center; }
.stat .num { font-size: 30px; font-weight: 700; color: var(--green); }

/* Mobile view */
@media (max-width: 640px) {
  body { font-size: 14px; }
  .topbar { padding: 8px 10px; }
  .topbar nav { width: 100%; margin-left: 0; }
  .container { margin: 10px auto; }
  .card { padding: 14px; }
  .slot-grid { grid-template-columns: repeat(4, 1fr); }
  table { display: block; overflow-x: auto; white-space: nowrap; }
  .filter-bar { flex-direction: column; align-items: stretch; }
}