:root {
    --primary-color: #B71C1C;      /* Merah Tegas */
    --secondary-color: #FBE9E7;    /* Kain Krem */
    --accent-color: #FFB300;       /* Emas Murni */
    --text-color: #212121;        /* Hitam Pekat */
    --light-color: #FFFBFE;       /* Putih Tulang */
    --danger-color: #B71C1C;       /* Sama dengan primer */
    --warning-color: #FF6F00;      /* Oranye Terang */
    --dark-color: #212121;         /* Sama dengan teks */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: #e9ecef;
    color: var(--dark-color);
}

header {
    background-color: var(--dark-color);
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

header h1 { font-size: 1.5rem; }
header h1 i { margin-right: 0.5rem; }

nav .nav-btn {
    background-color: transparent;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    margin-left: 0.5rem;
    cursor: pointer;
    border-radius: 5px;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}
nav .nav-btn:hover, nav .nav-btn.active { background-color: var(--primary-color); }

.container {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* --- CARD/SLIDE VIEW STYLES --- */
.view-card {
    display: none;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    overflow: hidden;
    animation: fadeIn 0.4s ease-in-out;
}

.view-card.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.card-header {
    background-color: var(--light-color);
    padding: 1.5rem;
    border-bottom: 1px solid #dee2e6;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 1.5rem;
    color: var(--dark-color);
}

.card-body {
    padding: 1.5rem;
}

/* --- COMPONENT STYLES --- */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}
.card {
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    text-align: center;
    border-left: 5px solid var(--primary-color);
}
.card h3 { font-size: 1rem; color: #6c757d; margin-bottom: 0.5rem; }
.card p { font-size: 1.8rem; font-weight: bold; color: var(--primary-color); }

/* --- CHART STYLES --- */
.chart-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: var(--light-color);
    border-radius: 8px;
}
.chart-section h3 { margin-bottom: 1rem; color: var(--dark-color); }
.chart-container { width: 100%; }
.chart-bars {
    display: flex;
    align-items: flex-end;
    height: 200px;
    gap: 10px;
    padding: 0 10px;
    border-bottom: 2px solid #ced4da;
}
.chart-bar {
    background-color: var(--primary-color);
    flex-grow: 1;
    width: 100%;
    position: relative;
    transition: height 0.5s ease;
    min-height: 5px;
}
.chart-bar-value {
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.8rem;
    font-weight: bold;
    color: var(--dark-color);
}
.chart-labels {
    display: flex;
    justify-content: space-around;
    margin-top: 10px;
    font-size: 0.8rem;
    color: #6c757d;
}

/* --- POS STYLES --- */
.pos-container { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
#product-search { width: 100%; padding: 0.8rem; font-size: 1rem; border: 1px solid #ccc; border-radius: 5px; margin-bottom: 1rem; }
#search-results { max-height: 400px; overflow-y: auto; background-color: white; border-radius: 5px; box-shadow: 0 2px 4px rgba(0,0,0,0.05); }
.search-result-item { padding: 1rem; border-bottom: 1px solid #eee; cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.search-result-item:hover { background-color: var(--light-color); }
.pos-cart { background-color: white; padding: 1.5rem; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.05); }
.cart-summary { margin-top: 1rem; padding-top: 1rem; border-top: 2px solid #eee; display: flex; justify-content: space-between; align-items: center; }
.cart-summary h4 { font-size: 1.2rem; }

/* --- TABLE & FORM STYLES --- */
table { width: 100%; background-color: white; border-collapse: collapse; }
th, td { padding: 0.8rem 1rem; text-align: left; border-bottom: 1px solid #ddd; }
th { background-color: var(--light-color); }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.5rem; }
.form-group input { width: 100%; padding: 0.7rem; border: 1px solid #ccc; border-radius: 5px; }

/* --- BUTTON STYLES --- */
.btn-primary, .btn-edit, .btn-danger {
    border: none;
    padding: 0.7rem 1.2rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}
.btn-primary { background-color: var(--primary-color); color: white; }
.btn-primary:hover { background-color: #218838; }
.btn-edit { background-color: var(--secondary-color); color: white; padding: 0.4rem 0.8rem; }
.btn-danger { background-color: var(--danger-color); color: white; padding: 0.4rem 0.8rem; }

/* --- MODAL STYLES --- */
.modal { display: none; position: fixed; z-index: 1000; left: 0; top: 0; width: 100%; height: 100%; overflow: auto; background-color: rgba(0,0,0,0.5); }
.modal-content { background-color: white; margin: 10% auto; padding: 2rem; border-radius: 8px; width: 90%; max-width: 500px; position: relative; }
.close-btn { position: absolute; right: 1rem; top: 1rem; font-size: 2rem; cursor: pointer; }

/* --- ALERTS & REPORTS --- */
.alerts-section { background-color: #fff3cd; border: 1px solid #ffeaa7; padding: 1rem; border-radius: 8px; }
.alerts-section h3 { color: #856404; margin-bottom: 0.5rem; }
#low-stock-list ul { list-style-type: none; }
#low-stock-list li { color: #856404; }
.report-controls { display: flex; gap: 1rem; align-items: center; margin-bottom: 2rem; flex-wrap: wrap; }
.report-controls label { font-weight: bold; }
.report-controls input { padding: 0.5rem; border: 1px solid #ccc; border-radius: 5px; }

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    header { flex-direction: column; gap: 1rem; }
    .pos-container { grid-template-columns: 1fr; }
    .summary-cards { grid-template-columns: 1fr; }
    .card-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
    .report-controls { flex-direction: column; align-items: flex-start; }
}