/* --- Modern & Responsive CSS --- */

/* 1. Custom Properties (Variables) untuk Tema */
:root {
    --primary-color: #1a2a4c;      /* Navy Blue */
    --secondary-color: #f8f9fa;    /* Light Gray */
    --accent-color: #007bff;       /* Standard Blue */
    --success-color: #28a745;      /* Green */
    --danger-color: #dc3545;       /* Red */
    --warning-color: #ffc107;      /* Yellow */
    --income-color: #10b981;       /* Emerald */
    --expense-color: #f43f5e;      /* Rose */
    --text-color: #212529;
    --light-text: #6c757d;
    --border-color: #dee2e6;
    --card-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    --card-hover-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

/* 2. Global Styles & Typography */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--secondary-color);
    color: var(--text-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 3. Navbar Modernisasi */
.navbar {
    background-color: var(--primary-color) !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

/* 4. Card Component Styling */
.card {
    border: none;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden; /* Penting untuk rounded corners pada gambar atau elemen di dalamnya */
}
.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-hover-shadow);
}
.card-header {
    background-color: #fff;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    padding: 1.25rem;
}
.card-header h4 { margin: 0; }

/* 5. Form Styling */
.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.form-control:focus, .form-select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}
.btn {
    border-radius: 8px;
    font-weight: 500;
    padding: 10px 20px;
    transition: all 0.2s;
}

/* 6. Dashboard Summary Cards */
.summary-card {
    color: white;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}
.summary-card.income { background: linear-gradient(135deg, var(--income-color), #059669); }
.summary-card.expense { background: linear-gradient(135deg, var(--expense-color), #e11d48); }
.summary-card.balance { background: linear-gradient(135deg, var(--accent-color), #0056b3); }
.summary-card .card-body { z-index: 1; position: relative; }
.summary-card h5 { font-size: 1.75rem; font-weight: 700; }
.summary-card i { position: absolute; right: 20px; top: 50%; transform: translateY(-50%); font-size: 4rem; opacity: 0.2; }

/* 7. Super Responsive Table & Card View */
.table-container-desktop { display: block; }
.cards-container-mobile { display: none; }

@media (max-width: 767.98px) {
    .table-container-desktop { display: none; }
    .cards-container-mobile { display: block; }
    
    .transaction-card, .category-card {
        border: 1px solid var(--border-color);
        border-radius: 12px;
        padding: 1rem;
        margin-bottom: 1rem;
        background: #fff;
        transition: transform 0.2s, box-shadow 0.2s;
    }
    .transaction-card:hover, .category-card:hover {
        transform: scale(1.02);
        box-shadow: var(--card-shadow);
    }
    .transaction-card .d-flex { justify-content: space-between; align-items: center; }
    .transaction-card .amount { font-size: 1.25rem; font-weight: 700; }
    .transaction-card .badge { font-size: 0.8rem; }
}