/* ==========================================
   1. VARIABLES (Light & Dark Theme Support)
   ========================================== */
:root {
    /* Fonts & Radii */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.25s ease;

    /* Semantic Colors (Constant across themes) */
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);

    /* --- LIGHT MODE COLORS (Default) --- */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --text-muted: #64748b;
    --nav-bg: #0f172a;
    --nav-text: #ffffff;
    --table-header: #f1f5f9;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
}

/* Automatic Dark Mode Detection */
@media (prefers-color-scheme: dark) {
    :root {
        --primary: #3b82f6;
        --primary-dark: #60a5fa;
        --bg: #0f172a;
        --card-bg: #1e293b;
        --border: #334155;
        --text: #f8fafc;
        --text-muted: #94a3b8;
        --nav-bg: #1e293b;
        --nav-text: #f8fafc;
        --table-header: #1e293b;
        --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    }
}

/* ==========================================
   2. GLOBAL STYLES & RESET
   ========================================== */
* { 
    box-sizing: border-box; 
    transition: background-color var(--transition), border-color var(--transition), color var(--transition);
}

body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* ==========================================
   3. NAVIGATION BAR
   ========================================== */
.navbar {
    background: var(--nav-bg);
    color: var(--nav-text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 32px;
    flex-wrap: wrap;
    box-shadow: var(--shadow);
}

.navbar-admin { 
    background: linear-gradient(135deg, #312e81 0%, #1e1b4b 100%); 
}

.navbar .brand { 
    font-weight: 700; 
    font-size: 1.3rem; 
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-links a {
    color: var(--nav-text);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    opacity: 0.85;
}

.nav-links a:hover { 
    opacity: 1;
}

.nav-links .balance {
    background: rgba(255, 255, 255, 0.1);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-links .logout { 
    color: #fca5a5; 
    font-weight: 600;
}

/* ==========================================
   4. LAYOUT & CONTAINERS
   ========================================== */
.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 24px;
}

.auth-box {
    max-width: 440px;
    margin: 80px auto;
    background: var(--card-bg);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.auth-box h2 { 
    margin-top: 0; 
    margin-bottom: 24px;
    text-align: center; 
    color: var(--primary); 
    font-size: 1.75rem;
    font-weight: 700;
}

/* ==========================================
   5. FORMS & INPUTS
   ========================================== */
form.app-form, .auth-box form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

label { 
    font-weight: 600; 
    font-size: 0.88rem; 
    color: var(--text-muted);
    margin-bottom: -10px;
}

input, select, button {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    background: var(--card-bg);
    color: var(--text);
    outline: none;
}

input:focus, select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Buttons */
button {
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    font-weight: 600;
    padding: 14px;
    box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}

button:hover { 
    background: var(--primary-dark); 
    transform: translateY(-1px);
}

button:active {
    transform: translateY(0);
}

button.btn-danger { 
    background: var(--danger); 
    box-shadow: 0 2px 4px rgba(239, 68, 68, 0.2);
}
button.btn-danger:hover { 
    background: #dc2626; 
}

/* ==========================================
   6. ALERTS & BADGES
   ========================================== */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-weight: 500;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
}

.alert-error { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(239, 68, 68, 0.2); }
.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(16, 185, 129, 0.2); }

/* Badges */
.badge {
    padding: 6px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-block;
}

.badge-success, .badge-active, .badge-approved, .badge-credit { background: var(--success-bg); color: var(--success); }
.badge-pending, .badge-initiated, .badge-inactive { background: var(--warning-bg); color: var(--warning); }
.badge-failed, .badge-blocked, .badge-rejected, .badge-cancelled, .badge-debit { background: var(--danger-bg); color: var(--danger); }

/* ==========================================
   7. STATS GRID
   ========================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin: 24px 0 40px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: left; /* Modern clean looks look better left-aligned */
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

/* Left accent bar instead of top for a premium look */
.stat-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary);
}
.stat-card.success::before { background: var(--success); }
.stat-card.pending::before { background: var(--warning); }

.stat-card h3 { 
    margin: 0; 
    font-size: 2rem; 
    color: var(--text); 
    font-weight: 700;
}
.stat-card p { 
    margin: 8px 0 0; 
    color: var(--text-muted); 
    font-size: 0.9rem; 
    font-weight: 500;
}

/* ==========================================
   8. TABLES
   ========================================== */
.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--card-bg);
    box-shadow: var(--shadow);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
}

.data-table th, .data-table td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    font-size: 0.92rem;
}

.data-table th { 
    background: var(--table-header); 
    font-weight: 600;
    color: var(--text-muted);
}

.data-table tr:last-child td {
    border-bottom: none;
}

/* ==========================================
   9. MISCELLANEOUS (Filters, Pagination, Details)
   ========================================== */
.filter-bar { 
    margin-bottom: 20px; 
    display: flex;
    gap: 12px;
}
.filter-bar a { 
    color: var(--text-muted); 
    text-decoration: none; 
    font-size: 0.9rem;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-weight: 500;
}
.filter-bar a:hover {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

.pagination { 
    margin-top: 24px; 
    display: flex;
    gap: 6px;
}
.pagination a {
    display: inline-block;
    padding: 8px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
}
.pagination a.active { 
    background: var(--primary); 
    color: #fff; 
    border-color: var(--primary);
}
.pagination a:hover:not(.active) {
    background: var(--table-header);
}

.wallet-balance-large { 
    font-size: 1.75rem; 
    font-weight: 700; 
    color: var(--primary); 
}

/* Details Panel Style */
details { 
    margin-top: 12px; 
    background: var(--bg);
    padding: 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}
details summary {
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
}
details form { 
    flex-direction: row; 
    gap: 8px; 
    align-items: center; 
    margin-top: 10px; 
    flex-wrap: wrap;
}
details input, details select { margin-top: 0; padding: 8px 12px; }
details button { margin-top: 0; padding: 8px 16px; }