:root {
  --navy: #14213d;
  --navy-dark: #0b1526;
  --gold: #b8860b;
  --gold-light: #d4a72c;
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1c2331;
  --muted: #5c6572;
  --danger: #a4262c;
  --success: #1e6b3c;
  --border: #dfe3ea;
  --radius: 8px;
}

* { 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);
  line-height: 1.5;
}

a { color: var(--navy); }

.site-header {
  background: var(--navy);
  color: #fff;
  border-bottom: 3px solid var(--gold);
}
.site-header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.brand { display: flex; align-items: center; text-decoration: none; }
.brand-logo { max-height: 56px; width: auto; display: block; }
.brand-text { color: #fff; font-size: 1.4rem; font-weight: 700; letter-spacing: 0.02em; }
.main-nav a {
  color: #f0f1f3;
  text-decoration: none;
  margin-left: 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
}
.main-nav a:first-child { margin-left: 0; }
.main-nav a:hover { color: var(--gold-light); }

.site-main { max-width: 1100px; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }

.flash { padding: 0.9rem 1.1rem; border-radius: var(--radius); margin-bottom: 1.25rem; font-weight: 600; }
.flash-info { background: #e7f0fb; color: #0b3d7a; }
.flash-error { background: #fbe9e9; color: var(--danger); }
.flash-success { background: #e7f6ec; color: var(--success); }

.site-footer { text-align: center; color: var(--muted); padding: 2rem 0; font-size: 0.85rem; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

h1 { font-size: 1.9rem; margin-top: 0; }
h2 { font-size: 1.4rem; }

.hero {
  background: linear-gradient(135deg, var(--navy), var(--navy-dark));
  color: #fff;
  border-radius: var(--radius);
  padding: 2.5rem;
  margin-bottom: 2rem;
}
.hero h1 { color: #fff; }
.hero p { color: #d7dce6; font-size: 1.05rem; max-width: 700px; }

.section-block { margin-bottom: 2rem; }
.section-block img { max-width: 100%; border-radius: var(--radius); }

.class-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}
.class-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-decoration: none;
  color: var(--text);
  display: block;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.class-card:hover { box-shadow: 0 6px 18px rgba(20,33,61,0.12); transform: translateY(-2px); }
.class-card h3 { margin: 0 0 0.35rem; color: var(--navy); }
.class-card .meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 0.5rem; }
.class-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.class-list-item {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  color: var(--text);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.class-list-item:hover { box-shadow: 0 6px 18px rgba(20,33,61,0.12); transform: translateY(-2px); }
.class-list-item .class-info { flex: 1; min-width: 0; }
.class-list-item h3 { margin: 0 0 0.35rem; color: var(--navy); }
.class-list-item .meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 0.35rem; }
.class-list-item .class-logo {
  width: 64px;
  height: 64px;
  min-width: 64px;
  max-width: 64px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border);
  background: var(--bg);
}
@media (max-width: 560px) {
  .class-list-item { flex-direction: column; align-items: flex-start; }
}

.seats-box { background: #f0f4fb; border: 1px solid #c6d5ef; border-radius: var(--radius); padding: 1rem 1.25rem; margin-bottom: 1.25rem; }
.seats-box.seats-full { background: #fbe9e9; border-color: #f0c1c1; }

.badge {
  display: inline-block;
  background: var(--gold);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  margin-right: 0.3rem;
  margin-bottom: 0.3rem;
}

.class-header-banner {
  background: var(--navy);
  color: #fff;
  padding: 1.5rem 2rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
}
.class-header-banner h1 { color: #fff; margin-bottom: 0.25rem; }

.datetime-block { font-size: 1.15rem; font-weight: 700; color: var(--navy); margin-bottom: 1rem; }

.countdown {
  display: flex;
  gap: 1rem;
  margin: 1rem 0;
}
.countdown .unit {
  background: var(--navy);
  color: #fff;
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  text-align: center;
  min-width: 70px;
}
.countdown .unit .num { font-size: 1.6rem; font-weight: 700; display: block; }
.countdown .unit .label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em; }

.map-image { max-width: 100%; border-radius: var(--radius); border: 1px solid var(--border); }

.fee-box { background: #fbf7ec; border: 1px solid var(--gold-light); border-radius: var(--radius); padding: 1rem 1.25rem; margin-bottom: 1.25rem; }

form .form-row { margin-bottom: 1rem; }
label { display: block; font-weight: 600; margin-bottom: 0.3rem; }
input[type=text], input[type=email], input[type=tel], input[type=password], input[type=number], input[type=date], input[type=time], select, textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
}
textarea { min-height: 110px; resize: vertical; }
.checkbox-row { display: flex; align-items: flex-start; gap: 0.5rem; }
.checkbox-row input { width: auto; margin-top: 0.3rem; }

button, .btn {
  display: inline-block;
  background: var(--navy);
  color: #fff;
  border: none;
  padding: 0.65rem 1.4rem;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
}
button:hover, .btn:hover { background: var(--navy-dark); }
.btn-gold { background: var(--gold); }
.btn-gold:hover { background: #96700a; }
.btn-secondary { background: #6b7280; }
.btn-danger { background: var(--danger); }

table { width: 100%; border-collapse: collapse; }
table th, table td { text-align: left; padding: 0.6rem 0.5rem; border-bottom: 1px solid var(--border); }
table th { color: var(--muted); font-size: 0.8rem; text-transform: uppercase; }

.calendar { width: 100%; border-collapse: collapse; }
.calendar th { background: var(--navy); color: #fff; padding: 0.5rem; }
.calendar td { border: 1px solid var(--border); vertical-align: top; height: 90px; padding: 0.4rem; width: 14.28%; }
.calendar td.other-month { background: #f0f1f3; color: var(--muted); }
.calendar .day-num { font-weight: 700; font-size: 0.85rem; }
.calendar .day-count {
  display: inline-block;
  background: var(--gold);
  color: #fff;
  border-radius: 999px;
  font-size: 0.75rem;
  padding: 0.05rem 0.5rem;
  margin-top: 0.25rem;
}
.calendar-nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.calendar-nav a { text-decoration: none; font-weight: 700; }

.admin-tabs { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.admin-tabs a {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  text-decoration: none;
  background: #eef0f3;
  color: var(--text);
  font-weight: 600;
  font-size: 0.9rem;
}
.admin-tabs a.active { background: var(--navy); color: #fff; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
@media (max-width: 720px) {
  .grid-2 { grid-template-columns: 1fr; }
  .site-header-inner { flex-direction: column; align-items: flex-start; }
  .countdown { flex-wrap: wrap; }
}

.text-muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.mt-0 { margin-top: 0; }
.inline-form { display: inline; }