:root {
    --dark-blue-core: #0f172a;
    --dark-blue-alt: #1e293b;
    --accent-blue: #3b82f6;
    --light-grey-bg: #f8fafc;
    --light-grey-border: #e2e8f0;
    --text-dark: #334155;
    --text-white: #ffffff;
    --state-green: #22c55e;
    --state-yellow: #eab308;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
body { background-color: var(--light-grey-bg); color: var(--text-dark); line-height: 1.6; }
.wrapper { width: 100%; max-width: 1200px; margin: 0 auto; padding: 40px 20px; min-height: 75vh; }

/* Header Elements */
.main-header { background-color: var(--dark-blue-core); padding: 15px 0; position: sticky; top: 0; z-index: 1000; border-bottom: 2px solid var(--accent-blue); }
.header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0 20px; }
.logo-text { color: var(--text-white); font-size: 22px; font-weight: 800; text-decoration: none; letter-spacing: 1px; }
.logo-text span { color: var(--accent-blue); }
.nav-bar { display: flex; gap: 15px; align-items: center; }
.nav-bar a { color: #94a3b8; text-decoration: none; font-size: 14px; font-weight: 500; transition: color 0.3s; }
.nav-bar a:hover { color: var(--text-white); }
.btn-download { background-color: var(--accent-blue); color: var(--text-white) !important; padding: 8px 14px; border-radius: 4px; font-weight: bold !important; }
.btn-login, .btn-dash { border: 1px solid var(--accent-blue); padding: 6px 12px; border-radius: 4px; color: var(--text-white) !important; }
.btn-logout { background-color: #ef4444; color: var(--text-white) !important; padding: 6px 12px; border-radius: 4px; }

/* Hero System */
.hero { text-align: center; padding: 60px 20px; background-color: var(--dark-blue-alt); color: var(--text-white); border-radius: 8px; margin-bottom: 40px; }
.hero img { margin-bottom: 20px; border-radius: 8px; border: 3px solid var(--accent-blue); background-color: #fff; padding: 5px; }
.hero h1 { font-size: 36px; margin-bottom: 15px; }
.hero p { max-width: 800px; margin: 0 auto 25px auto; color: #cbd5e1; font-size: 18px; }
.action-grid { display: flex; gap: 15px; justify-content: center; flex-wrap: wrap; }
.btn-prime { background-color: var(--accent-blue); color: var(--text-white); padding: 12px 24px; text-decoration: none; font-weight: bold; border-radius: 4px; transition: background 0.2s; border: none; cursor: pointer; }
.btn-prime:hover { background-color: #2563eb; }
.btn-sub { background-color: transparent; border: 2px solid var(--light-grey-border); color: var(--text-white); padding: 10px 22px; text-decoration: none; border-radius: 4px; }

/* Standard Containers */
.info-card { background: white; padding: 30px; border-radius: 8px; border: 1px solid var(--light-grey-border); box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); margin-bottom: 30px; }
.info-card h2 { color: var(--dark-blue-core); margin-bottom: 15px; border-bottom: 2px solid var(--light-grey-border); padding-bottom: 10px; }

/* Forms UI */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 8px; color: var(--dark-blue-core); }
.form-control { width: 100%; padding: 10px 12px; border: 1px solid var(--light-grey-border); border-radius: 4px; font-size: 15px; color: var(--text-dark); background: #fff; }
.form-control:focus { border-color: var(--accent-blue); outline: none; box-shadow: 0 0 0 3px rgba(59,130,246,0.15); }
.alert-box { padding: 15px; border-radius: 4px; margin-bottom: 20px; font-weight: bold; }
.alert-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.alert-error { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }

/* Tables UI */
.table-responsive { overflow-x: auto; width: 100%; margin-top: 20px; }
table { width: 100%; border-collapse: collapse; text-align: left; background: white; border-radius: 6px; overflow: hidden; }
th { background-color: var(--dark-blue-alt); color: var(--text-white); padding: 12px 15px; font-weight: 600; font-size: 14px; }
td { padding: 12px 15px; border-bottom: 1px solid var(--light-grey-border); font-size: 14px; }
tr:hover { background-color: #f1f5f9; }

/* Badges */
.badge { padding: 4px 8px; border-radius: 4px; font-size: 12px; font-weight: bold; text-transform: uppercase; display: inline-block; }
.badge-available { background-color: #dcfce7; color: #166534; }
.badge-inquired { background-color: #fef9c3; color: #854d0e; }
.badge-booked { background-color: #fee2e2; color: #991b1b; }

/* Admin Architecture Styles */
.admin-grid { display: grid; grid-template-columns: 260px 1fr; gap: 30px; margin-top: 20px; }
.admin-sidebar { background: var(--dark-blue-core); padding: 20px; border-radius: 8px; height: fit-content; }
.admin-sidebar h3 { color: var(--text-white); font-size: 14px; margin-bottom: 15px; text-transform: uppercase; tracking: 1px; border-bottom: 1px solid var(--dark-blue-alt); padding-bottom: 5px; }
.admin-sidebar ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.admin-sidebar a { color: #94a3b8; text-decoration: none; font-size: 15px; display: block; padding: 8px 12px; border-radius: 4px; }
.admin-sidebar a:hover, .admin-sidebar a.active { background: var(--dark-blue-alt); color: var(--text-white); }
.filter-bar { background: #e2e8f0; padding: 15px; border-radius: 6px; margin-bottom: 20px; display: flex; gap: 15px; flex-wrap: wrap; align-items: flex-end; }
.filter-bar .form-group { margin-bottom: 0; }

/* Footer Elements */
.main-footer { background-color: var(--dark-blue-core); color: #64748b; padding: 40px 20px; font-size: 14px; border-top: 4px solid var(--dark-blue-alt); margin-top: auto; }
.footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; }
.footer-block h3 { color: var(--text-white); font-size: 16px; margin-bottom: 15px; }
.footer-block p { line-height: 1.8; }

/* Mobile Adaptations */
@media(max-width: 900px) {
    .header-container { flex-direction: column; gap: 15px; text-align: center; }
    .nav-bar { flex-direction: column; width: 100%; gap: 10px; }
    .nav-bar a { display: block; width: 100%; padding: 6px 0; }
    .admin-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 28px; }
}