/* Import Google Font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary-color: #4F46E5;
    --secondary-color: #10B981;
    --light-bg: #F3F4F6;
    --light-surface: #FFFFFF;
    --light-text: #111827;
    --dark-bg: #1F2937;
    --dark-surface: #374151;
    --dark-text: #F9FAFB;
    --border-radius: 0.5rem;
}

body {
    font-family: 'Inter', sans-serif;
    transition: background-color 0.3s, color 0.3s;
}

body.light-mode {
    background-color: var(--light-bg);
    color: var(--light-text);
}

body.dark-mode {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

.surface {
    transition: background-color 0.3s, color 0.3s;
}

.light-mode .surface {
    background-color: var(--light-surface);
    color: var(--light-text);
    border: 1px solid #E5E7EB;
}

.dark-mode .surface {
    background-color: var(--dark-surface);
    color: var(--dark-text);
    border: 1px solid #4B5563;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}
.btn-primary:hover {
    opacity: 0.9;
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.sidebar {
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    padding-top: 56px; /* Navbar height */
}

.light-mode .sidebar {
     background-color: var(--light-surface);
}

.dark-mode .sidebar {
     background-color: var(--dark-surface);
}


.main-content {
    margin-left: 280px;
    padding-top: 72px; /* Navbar height + padding */
    transition: margin-left 0.3s;
}

.sidebar.collapsed {
    width: 0;
    overflow: hidden;
}

.main-content.expanded {
    margin-left: 0;
}

@media (max-width: 768px) {
    .sidebar {
        width: 280px; /* Fixed width for the overlay sidebar */
        position: fixed; /* Ensure it overlays content */
        top: 0;
        left: 0;
        height: 100vh;
        z-index: 1040; /* Above most content, below modals */
        transform: translateX(0); /* Default to visible, then hide if collapsed */
        transition: transform 0.3s ease-in-out; /* Smooth transition */
        padding-top: 56px; /* Navbar height */
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05); /* Optional shadow */
    }
    .sidebar.collapsed { /* When the collapsed class is present, hide the sidebar */
        transform: translateX(-280px);
    }
    /* On small screens, main-content should always be full width */
    .main-content {
        margin-left: 0;
    }
}

.navbar-brand svg {
    height: 2rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 0.25rem;
}

.light-mode .nav-link {
    color: #374151;
}
.dark-mode .nav-link {
    color: #D1D5DB;
}

.light-mode .nav-link:hover, .light-mode .nav-link.active {
    background-color: #E0E7FF;
    color: var(--primary-color);
}
.dark-mode .nav-link:hover, .dark-mode .nav-link.active {
    background-color: #4338CA;
    color: white;
}

.nav-link svg {
    width: 1.25rem;
    height: 1.25rem;
}

.card {
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-text {
    font-size: 0.9rem;
    color: #6B7280; /* Neutral gray for description */
}

.dark-mode .card-text {
    color: #9CA3AF;
}

.card-footer {
    font-size: 0.8rem;
    background-color: transparent;
    border-top: none;
}