:root {
    --bg-color: #0f172a;
    --surface-color: rgba(30, 41, 59, 0.85);
    --surface-border: rgba(148, 163, 184, 0.15);
    --text-color: #e2e8f0;
    --text-muted: #94a3b8;
    --accent-color: #06b6d4;
    --accent-glow: rgba(6, 182, 212, 0.35);
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
}

body {
    background-color: var(--bg-color);
    background-image:
        radial-gradient(circle at 15% 50%, rgba(6, 182, 212, 0.08) 0%, transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.08) 0%, transparent 25%);
    color: var(--text-color);
    font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    min-height: 100vh;
}

.navbar {
    background: linear-gradient(90deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.95) 100%) !important;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--surface-border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--accent-color) !important;
    text-shadow: 0 0 12px var(--accent-glow);
}

.navbar-nav .nav-link {
    color: var(--text-color) !important;
    font-weight: 500;
    transition: color 0.2s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--accent-color) !important;
}

.navbar-text {
    color: var(--text-muted) !important;
}

.card {
    background-color: var(--surface-color);
    border: 1px solid var(--surface-border);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
    color: var(--text-color);
}

.card-title {
    color: var(--text-color);
    font-weight: 600;
}

.text-muted {
    color: var(--text-muted) !important;
}

.table {
    color: var(--text-color);
}

.table-striped > tbody > tr:nth-of-type(odd) > * {
    background-color: rgba(255, 255, 255, 0.03);
    color: var(--text-color);
}

.table-hover > tbody > tr:hover > * {
    background-color: rgba(6, 182, 212, 0.08);
}

.table-secondary > * {
    background-color: rgba(148, 163, 184, 0.15) !important;
}

.form-control,
.form-select,
.form-control-color {
    background-color: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--surface-border);
    color: var(--text-color);
}

.form-control:focus,
.form-select:focus {
    background-color: rgba(15, 23, 42, 0.8);
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.25rem var(--accent-glow);
    color: var(--text-color);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.btn-primary {
    background: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
    border: none;
    box-shadow: 0 4px 14px rgba(6, 182, 212, 0.35);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0e7490 0%, #0891b2 100%);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.45);
}

.btn-success {
    background: linear-gradient(135deg, #059669 0%, #10b981 100%);
    border: none;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);
    border: none;
}

.btn-outline-primary {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.btn-outline-primary:hover {
    background-color: var(--accent-color);
    color: #fff;
}

.alert {
    border: 1px solid var(--surface-border);
}

.checkin-container {
    max-width: 900px;
    margin: 0 auto;
}

.qr-reader {
    width: 100%;
    min-height: 300px;
    border: 2px dashed var(--surface-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(15, 23, 42, 0.5);
}

.guest-photo {
    width: 100%;
    max-width: 300px;
    height: 300px;
    object-fit: cover;
    border-radius: 16px;
    border: 3px solid var(--surface-border);
    background-color: rgba(15, 23, 42, 0.6);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.guest-photo-placeholder {
    width: 100%;
    max-width: 300px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.8) 100%);
    border-radius: 16px;
    color: var(--text-muted);
    font-size: 1.2rem;
    border: 2px dashed var(--surface-border);
}

#search-results .list-group-item {
    cursor: pointer;
    background-color: rgba(15, 23, 42, 0.6);
    border-color: var(--surface-border);
    color: var(--text-color);
}

#search-results .list-group-item:hover {
    background-color: rgba(6, 182, 212, 0.12);
    color: var(--accent-color);
}

.btn-lg {
    padding: 15px;
    font-size: 1.25rem;
}

.table th {
    white-space: nowrap;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-color);
}

.display-6 {
    font-weight: 700;
}

div[style*="max-width: 600px"] {
    background: var(--surface-color) !important;
    border: 1px solid var(--surface-border) !important;
}