:root {
    --primary-bg: #f3f4f6;
    --sidebar-bg: #0f172a;
    --sidebar-text: #e2e8f0;
    --accent: #f97316;
    --accent-hover: #ea580c;
    --card-bg: #ffffff;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --border: #e5e7eb;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-main);
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    padding: 1rem;
    position: fixed;
    height: 100%;
    left: 0;
    top: 0;
}

.sidebar h2 {
    color: var(--accent);
    margin-bottom: 2rem;
    font-size: 1.5rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.sidebar nav a {
    color: var(--sidebar-text);
    text-decoration: none;
    padding: 0.75rem 1rem;
    display: block;
    margin-bottom: 0.5rem;
    border-radius: 0.375rem;
    transition: background-color 0.2s;
}

.sidebar nav a:hover, .sidebar nav a.active {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--accent);
}

.user-info {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.user-info strong {
    color: var(--sidebar-text);
    display: block;
    margin-bottom: 0.25rem;
}

.logout-btn {
    color: #ef4444 !important;
    margin-top: 0.5rem;
}

/* Main Content */
.main-content {
    margin-left: 250px;
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    width: calc(100% - 250px);
}

h1 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

/* Cards */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border-left: 4px solid var(--accent);
}

.card h3 {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.card .value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-main);
}

/* Tables */
.table-container {
    background-color: var(--card-bg);
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    margin-top: 1rem;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background-color: #f9fafb;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
}

tr:hover {
    background-color: #f9fafb;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.2s;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
}

.btn-primary {
    background-color: var(--accent);
    color: white;
}

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

.btn-secondary {
    background-color: white;
    border: 1px solid var(--border);
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: #f9fafb;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-main);
}

input, select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    font-size: 1rem;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.2);
}

/* Login Page */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 100%;
    background-color: var(--primary-bg);
}

.login-box {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    color: var(--accent);
    font-size: 1.75rem;
}

.alert {
    padding: 0.75rem;
    background-color: #fee2e2;
    color: #991b1b;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-low {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge-ok {
    background-color: #d1fae5;
    color: #065f46;
}

.header-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}