:root {
    --bg-color: #0f172a;
    --sidebar-bg: #1e293b;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --danger: #ef4444;
    --success: #22c55e;
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--sidebar-bg);
    border-right: var(--glass-border);
    display: flex;
    flex-direction: column;
    padding: 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent);
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.lang-switch {
    margin-top: auto;
    display: flex;
    justify-content: center;
    gap: 10px;
    padding-top: 20px;
    border-top: var(--glass-border);
}

.lang-btn {
    background: transparent;
    border: 1px solid var(--text-secondary);
    color: var(--text-secondary);
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
}

.lang-btn.active,
.lang-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    margin-bottom: 5px;
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    background-color: var(--accent);
    color: white;
}

.nav-link i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.page-title {
    font-size: 2rem;
    font-weight: 600;
}

/* Cards */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: var(--glass-border);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-5px);
}

.card-title {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

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

/* Tables */
.table-container {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    overflow-x: auto;
    border: var(--glass-border);
}

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

th,
td {
    padding: 15px;
    text-align: left;
    border-bottom: var(--glass-border);
}

th {
    color: var(--text-secondary);
    font-weight: 600;
}

tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: opacity 0.2s;
}

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

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

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 12px;
    background-color: rgba(255, 255, 255, 0.05);
    border: var(--glass-border);
    border-radius: 8px;
    color: white;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
}

select.form-control {
    background-color: #1e293b;
    /* Solid background for select */
    color: white;
    appearance: menulist;
    /* Force default dropdown behavior for better OS support */
}

select.form-control option {
    background-color: #1e293b;
    color: white;
}

/* For some browsers that might force white background on options */
@media (prefers-color-scheme: dark) {
    select.form-control option {
        background-color: #1e293b;
        color: white;
    }
}

.badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
}

.badge-a { background-color: var(--success); }
.badge-b { background-color: #f59e0b; } /* Orange/Amber */
.badge-c { background-color: var(--text-secondary); }
.badge-na { background-color: #475569; }

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--sidebar-bg);
    padding: 30px;
    border-radius: 12px;
    width: 500px;
    max-width: 90%;
    border: var(--glass-border);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    margin-right: 15px;
}

/* Responsive Styles */
@media (max-width: 768px) {
    body {
        flex-direction: column;
    }

    .sidebar {
        position: fixed;
        left: -100%;
        top: 0;
        height: 100vh;
        z-index: 2000;
        transition: 0.3s;
        width: 280px;
    }

    .sidebar.active {
        left: 0;
    }

    .mobile-toggle {
        display: block;
    }

    .main-content {
        padding: 20px 15px;
    }

    .header {
        flex-wrap: wrap;
        gap: 15px;
    }

    .page-title {
        font-size: 1.5rem;
    }

    .grid-container {
        grid-template-columns: 1fr;
    }

    .modal-content {
        width: 95%;
        padding: 20px;
    }

    /* Stack or Scroll Table */
    .table-container {
        padding: 10px;
    }

    th,
    td {
        padding: 10px 8px;
        font-size: 0.9rem;
    }
}

/* Overlay for sidebar */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1500;
}

.sidebar-overlay.active {
    display: block;
}