:root {
    --primary: #0b4f88;
    --primary-dark: #083b66;
    --secondary: #eaf3fb;
    --accent: #1d77c3;
    --success: #dff4e8;
    --success-text: #166534;
    --error: #fde2e2;
    --error-text: #9f1239;
    --warning: #fff4d6;
    --warning-text: #92400e;
    --border: #d6e2ef;
    --text: #1f2937;
    --muted: #6b7280;
    --white: #ffffff;
    --shadow: 0 10px 25px rgba(11, 79, 136, 0.08);
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f5f9fd;
    color: var(--text);
}
.container {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 16px;
}
.site-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    padding: 22px 0;
    box-shadow: var(--shadow);
}
.header-flex {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
}
.site-title {
    margin: 0 0 6px;
    font-size: 28px;
}
.site-subtitle {
    margin: 0;
    opacity: .9;
}
.top-nav {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.top-nav a {
    color: var(--white);
    text-decoration: none;
    padding: 10px 14px;
    border: 1px solid rgba(255,255,255,.25);
    border-radius: 8px;
}
.top-nav a:hover { background: rgba(255,255,255,.1); }
.main-content { padding: 28px 16px; }
.card, .panel, .table-wrap, .form-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: var(--shadow);
}
.panel, .form-card, .table-wrap { padding: 20px; margin-bottom: 22px; }
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
}
.card {
    padding: 18px;
}
.card h3 { margin-top: 0; color: var(--primary); }
.form-group { margin-bottom: 14px; }
label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
}
input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="time"],
textarea,
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c5d3e2;
    border-radius: 8px;
    font-size: 15px;
    background: #fff;
}
textarea { min-height: 100px; resize: vertical; }
.btn, button, .btn-link {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 8px;
    padding: 11px 16px;
    cursor: pointer;
    text-decoration: none;
    font-size: 14px;
}
.btn:hover, button:hover, .btn-link:hover { background: var(--primary-dark); }
.btn-secondary {
    background: #64748b;
}
.btn-danger {
    background: #b91c1c;
}
.btn-warning {
    background: #b45309;
}
.btn-success {
    background: #0f766e;
}
.inline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
table {
    width: 100%;
    border-collapse: collapse;
    min-width: 760px;
}
th, td {
    padding: 12px 10px;
    border-bottom: 1px solid #e3edf6;
    text-align: left;
    vertical-align: top;
}
th {
    background: var(--secondary);
    color: var(--primary-dark);
}
.table-wrap { overflow-x: auto; }
.badge {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: bold;
}
.badge-disponible { background: #dbeafe; color: #1d4ed8; }
.badge-reservada { background: #fee2e2; color: #b91c1c; }
.badge-no_disponible { background: #e5e7eb; color: #374151; }
.badge-activa { background: #dcfce7; color: #166534; }
.badge-cancelada { background: #fef3c7; color: #92400e; }
.alert {
    padding: 14px 16px;
    border-radius: 10px;
    margin-bottom: 18px;
    font-weight: bold;
}
.alert-success { background: var(--success); color: var(--success-text); }
.alert-error { background: var(--error); color: var(--error-text); }
.alert-warning { background: var(--warning); color: var(--warning-text); }
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 22px;
}
.summary-box {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 18px;
    box-shadow: var(--shadow);
}
.summary-box strong {
    display: block;
    font-size: 28px;
    color: var(--primary);
    margin-top: 6px;
}
.site-footer {
    padding: 20px 0 30px;
    color: var(--muted);
}
.small { color: var(--muted); font-size: 13px; }
.center { text-align: center; }
@media (max-width: 768px) {
    .header-flex { flex-direction: column; align-items: flex-start; }
    .site-title { font-size: 24px; }
}