/* CSS Variables */
:root {
    --primary-color: #0d47a1;   /* Deep Blue */
    --primary-dark: #002171;
    --secondary-color: #f5f5f5; /* Light Gray Background */
    --accent-color: #ffab40;    /* Warm Orange/Amber */
    --text-color: #333;
    --light-text-color: #fefefe;
    --border-color: #ddd;
    --danger-color: #d32f2f;
    --success-color: #388e3c;
    --border-radius: 5px;
    --box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* Global Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--secondary-color);
    color: var(--text-color);
    line-height: 1.6;
}

.main-container {
    min-height: 95vh;
}

footer {
    text-align: center;
    padding: 1rem;
    font-size: 0.9em;
    color: #777;
}

/* --- Login Page Specific Styles --- */
.login-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 90vh;
}

.login-card {
    background-color: #fff;
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-card h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.login-card p {
    margin-bottom: 1.5rem;
    color: #666;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(13, 71, 161, 0.2);
}

.btn {
    display: inline-block;
    width: 100%;
    padding: 0.8rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--light-text-color);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
}

.error-message {
    background-color: #ffcdd2;
    color: var(--danger-color);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    border: 1px solid var(--danger-color);
}

/* --- Dashboard & General Layout --- */
.page-wrapper {
    display: grid;
    grid-template-columns: 240px 1fr; /* Sidebar width and main content takes the rest */
    height: 100vh;
    overflow: hidden;
}

.sidebar {
    background-color: #1a237e; /* Darker variant of primary color */
    color: var(--light-text-color);
    padding: 1.5rem 0;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    text-align: center;
    padding: 0 1rem 1.5rem 1rem;
    border-bottom: 1px solid #3949ab;
}

.sidebar-header h2 {
    margin-bottom: 0.2rem;
}

.sidebar-header p {
    font-size: 0.9em;
    color: #c5cae9;
}

.sidebar nav {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    margin-top: 1rem;
}

.sidebar nav a {
    color: var(--light-text-color);
    text-decoration: none;
    padding: 1rem 1.5rem;
    display: block;
    transition: background-color 0.3s ease;
}

.sidebar nav a:hover {
    background-color: #283593;
}

.sidebar nav a.active {
    background-color: var(--primary-color);
    font-weight: 700;
    border-left: 4px solid var(--accent-color);
    padding-left: calc(1.5rem - 4px);
}

.main-content {
    background-color: var(--secondary-color);
    padding: 2rem;
    overflow-y: auto; /* Allow content to scroll if it's too long */
}

.main-header {
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.main-header h1 {
    color: var(--primary-dark);
    font-size: 2em;
}

/* --- Dashboard Widgets --- */
.dashboard-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.widget {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
}

.widget-content {
    display: flex;
    flex-direction: column;
}

.widget-title {
    font-size: 1em;
    color: #666;
    margin-bottom: 0.5rem;
}

.widget-value {
    font-size: 2.2em;
    font-weight: 700;
    color: var(--primary-dark);
}

/* Specific widget colors */
.widget.widget-danger .widget-value {
    color: var(--danger-color);
}

.dashboard-main-panel {
    background-color: #fff;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/*
.placeholder-chart {
    background-color: #f0f0f0;
    text-align: center;
    padding: 4rem;
    border-radius: var(--border-radius);
    color: #999;
    border: 2px dashed var(--border-color);
}
*/

/* --- CSS Bar Chart Styles --- */
.chart-container {
    display: flex;
    justify-content: space-around;
    align-items: flex-end;
    gap: 20px;
    height: 250px;
    width: 100%;
    padding: 20px;
    background-color: #f9f9f9;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.chart-bar-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    /* --- THE FIX IS HERE --- */
    height: 100%;
    justify-content: flex-end;
}

.chart-bar {
    width: 70%;
    max-width: 80px;
    background-color: var(--primary-color);
    border-radius: 3px 3px 0 0;
    position: relative;
    transition: background-color 0.3s ease, height 0.5s ease-out;
    display: flex;
    justify-content: center;
}

.chart-bar:hover {
    background-color: var(--accent-color);
}

.bar-value {
    color: white;
    font-size: 0.8em;
    font-weight: bold;
    opacity: 0;
    transition: opacity 0.3s;
    position: absolute;
    top: -25px;
    background-color: #333;
    padding: 2px 6px;
    border-radius: 3px;
    white-space: nowrap; /* Prevents the value from wrapping */
}

.chart-bar:hover .bar-value {
    opacity: 1;
}

.bar-label {
    margin-top: 10px;
    font-size: 0.9em;
    font-weight: 500;
    color: var(--text-color);
    width: 100%;
}

/* inventory */

.content-panel {
    background-color: #fff;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn.btn-accent {
    background-color: var(--accent-color);
    color: var(--primary-dark);
    padding: 0.6rem 1.2rem;
    text-decoration: none;
    font-size: 0.9em;
}

.btn.btn-accent:hover {
    background-color: #ffc107; /* Lighter accent */
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
}

.data-table th, .data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table thead th {
    background-color: var(--secondary-color);
    font-weight: 700;
    color: var(--primary-dark);
}

.data-table tbody tr:hover {
    background-color: #f1f1f1;
}

/* Styles for the nested stock list */
.stock-list {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

.stock-list li {
    padding: 2px 0;
    font-size: 0.9em;
}

.stock-list li.low-stock {
    color: var(--danger-color);
    font-weight: bold;
}

.no-stock {
    font-style: italic;
    color: #888;
}

.action-btn, .action-btn-danger {
    font-size: 0.9em;
    padding: 4px 8px;
    border-radius: var(--border-radius);
    text-decoration: none;
    margin-right: 5px;
}

.action-btn {
    background-color: var(--primary-color);
    color: white;
}
.action-btn:hover {
    background-color: var(--primary-dark);
}

.action-btn-danger {
    background-color: var(--danger-color);
    color: white;
}
.action-btn-danger:hover {
    background-color: #c62828;
}

/* --- Form Styles --- */
.data-form .form-group {
    margin-bottom: 1.5rem;
}
.data-form label {
    display: block;
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.data-form input[type="text"],
.data-form input[type="number"],
.data-form select,
.data-form textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: 'Roboto', sans-serif;
}
.data-form input:focus,
.data-form select:focus,
.data-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(13, 71, 161, 0.2);
}
.data-form small {
    display: block;
    margin-top: 0.5rem;
    color: #777;
    font-size: 0.9em;
}
.form-actions {
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}
.btn-secondary {
    background-color: #6c757d;
    color: white;
    padding: 0.8rem;
    text-decoration: none;
    border-radius: var(--border-radius);
    display: inline-block;
}
.btn-secondary:hover {
    background-color: #5a6268;
}

/* --- Feedback Messages --- */
.success-message {
    background-color: #d4edda;
    color: var(--success-color);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    border: 1px solid #c3e6cb;
}

/* --- Adjust Stock Page --- */
.product-info-header {
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}
.product-info-header h2 {
    margin-bottom: 0.25rem;
}
.product-info-header p {
    color: #666;
    font-size: 1.1em;
}

/* --- Confirmation/Warning Box --- */
.warning-box {
    background-color: #fff3cd;
    color: #856404;
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    border: 1px solid #ffeeba;
}
.warning-box h3 {
    margin-bottom: 0.5rem;
}
.btn-danger {
    background-color: var(--danger-color);
    color: white;
}
.btn-danger:hover {
    background-color: #c62828;
}

/* --- Report Styles --- */
.filter-panel {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
}
.filter-panel .data-form {
    display: flex;
    align-items: center;
    gap: 2rem;
}
.filter-panel .form-group-inline {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.filter-panel .form-group-inline label {
    font-weight: 500;
}
.filter-panel input[type="date"] {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}
.filter-panel .btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.9em;
}

.summary-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}
.summary-widget {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
}
.summary-widget .widget-title {
    font-size: 1em;
    color: #666;
    margin-bottom: 0.5rem;
}
.summary-widget .widget-value {
    font-size: 2.2em;
    font-weight: 700;
    color: var(--primary-dark);
}

/* --- Sub Navigation for Reports --- */
.sub-nav {
    display: flex;
    gap: 10px;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}
.sub-nav a {
    padding: 10px 20px;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    border-radius: 5px 5px 0 0;
    border: 2px solid transparent;
    margin-bottom: -2px; /* Pulls the link down to overlap the main border */
}
.sub-nav a:hover {
    background-color: var(--secondary-color);
}
.sub-nav a.active {
    color: var(--primary-color);
    background-color: white;
    border-color: var(--border-color) var(--border-color) white var(--border-color);
    border-bottom-color: white; /* Hides the part of the main border underneath it */
}

.status-badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.85em;
    font-weight: 500;
    color: white;
}
.status-badge.status-active { background-color: var(--success-color); }
.status-badge.status-inactive { background-color: #757575; }

.action-btn-disabled {
    font-size: 0.9em;
    padding: 4px 8px;
    border-radius: var(--border-radius);
    margin-right: 5px;
    background-color: #ccc;
    color: #666;
    cursor: not-allowed;
    border: none;
}

/* --- View Sale Page --- */
.sale-info-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    background-color: #fff;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
}
.sale-info-panel .info-item {
    display: flex;
    flex-direction: column;
}
.sale-info-panel .info-item span {
    font-size: 0.9em;
    color: #666;
}
.sale-info-panel .info-item strong {
    font-size: 1.2em;
    font-weight: 500;
}
.sale-info-panel .info-item.total strong {
    font-size: 1.5em;
    font-weight: 700;
    color: var(--success-color);
}