/* Global Dark Theme Variables */
:root {
    --bg-dark: #0f172a;
    --card-bg: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-gradient: linear-gradient(90deg, #38bdf8, #a78bfa);
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Segoe UI', "Microsoft JhengHei", sans-serif;
}

/* Navbar Customization */
.navbar {
    background: #1e293b !important;
    border-bottom: 1px solid #334155;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: bold;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.navbar-brand .badge {
    -webkit-text-fill-color: #fff !important;
    color: #fff !important;
}

/* Primary Button Styling (User Request) */
.btn-primary {
    background: var(--accent-gradient);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    border: none;
    transition: all 0.3s ease;
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.5), 0 0 15px rgba(167, 139, 250, 0.5);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(56, 189, 248, 0.7), 0 0 20px rgba(167, 139, 250, 0.7);
    color: white;
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border: 1px solid #334155;
    color: var(--text-main);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
}

.card-title {
    color: var(--text-main);
}

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

/* Inputs */
.form-control {
    background-color: #0f172a;
    border: 1px solid #475569;
    color: var(--text-main);
}

.form-control:focus {
    background-color: #0f172a;
    color: var(--text-main);
    border-color: #38bdf8;
    box-shadow: 0 0 0 0.25rem rgba(56, 189, 248, 0.25);
}

/* Tables */
.table {
    color: var(--text-main);
}

.table-hover tbody tr:hover {
    color: var(--text-main);
    background-color: #334155;
}

/* Nav Tabs */
.nav-tabs .nav-link {
    color: var(--text-muted);
}

.nav-tabs .nav-link.active {
    background-color: var(--card-bg);
    color: #38bdf8;
    border-color: #334155 #334155 var(--card-bg);
}

/* Footer */
footer.bg-dark {
    background-color: #020617 !important;
    border-top: 1px solid #334155;
}

/* Utilities */
.bg-light {
    background-color: var(--bg-dark) !important;
}

.bg-white {
    background-color: var(--card-bg) !important;
}

/* Custom Alert */
.alert-info {
    background-color: rgba(56, 189, 248, 0.1);
    border-color: rgba(56, 189, 248, 0.2);
    color: #38bdf8;
}

/* Links */
a {
    color: #38bdf8;
    text-decoration: none;
}

a:hover {
    color: #a78bfa;
    text-decoration: underline;
}