@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --emerald: #10b981;
    --emerald-dark: #059669;
    --slate: #64748b;
    --background: #f8fafc;
    --white: #ffffff;
    --sidebar-width: 260px;
    --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background);
    color: var(--primary);
    overflow-x: hidden;
}

/* Sidebar Styling */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--primary);
    position: fixed;
    left: 0;
    top: 0;
    padding: 1.5rem;
    color: var(--white);
    transition: var(--transition);
    z-index: 1050; /* Above overlay */
    box-shadow: 4px 0 10px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

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

.sidebar-header {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--emerald);
}

.nav-link {
    color: #94a3b8;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    background-color: var(--primary-light);
    color: var(--emerald);
}

/* Main Content area */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 2rem;
    min-height: 100vh;
    transition: var(--transition);
}

/* Cards */
.card {
    background: var(--white);
    border: none;
    border-radius: 1rem;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

/* Buttons */
.btn-primary {
    background-color: var(--emerald);
    border-color: var(--emerald);
    font-weight: 500;
    padding: 0.6rem 1.5rem;
    border-radius: 0.5rem;
}

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

/* Forms */
.form-control, .form-select {
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    border: 1px solid #e2e8f0;
    background-color: #f1f5f9;
}

.form-control:focus {
    border-color: var(--emerald);
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
    background-color: var(--white);
}

/* Login Page specifically */
.login-wrapper {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, #1e293b 100%);
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 2.5rem;
}

/* Responsive Layout Adjustments */

/* On Desktop (large screens) */
@media (min-width: 992px) {
    /* When collapsed, keep a mini sidebar showing only icons */
    body.sidebar-collapsed .sidebar {
        width: 75px;
        left: 0;
        padding: 1.5rem 0.75rem;
        overflow: hidden;
    }
    
    body.sidebar-collapsed .sidebar .sidebar-header {
        justify-content: center;
        gap: 0;
    }
    
    body.sidebar-collapsed .sidebar .sidebar-header span {
        display: none;
    }
    
    body.sidebar-collapsed .sidebar .nav-link {
        padding: 0.75rem;
        justify-content: center;
        gap: 0;
    }
    
    body.sidebar-collapsed .sidebar .nav-link span {
        display: none;
    }
    
    body.sidebar-collapsed .sidebar .nav-link i {
        font-size: 1.2rem;
        min-width: 24px;
        text-align: center;
        margin: 0;
    }
    
    /* Expand the sidebar to full width on hover */
    body.sidebar-collapsed .sidebar:hover {
        width: var(--sidebar-width);
        padding: 1.5rem;
        box-shadow: 10px 0 30px rgba(15, 23, 42, 0.15);
    }
    
    body.sidebar-collapsed .sidebar:hover .sidebar-header {
        justify-content: flex-start;
        gap: 0.75rem;
    }
    
    body.sidebar-collapsed .sidebar:hover .sidebar-header span {
        display: inline;
    }
    
    body.sidebar-collapsed .sidebar:hover .nav-link {
        padding: 0.75rem 1rem;
        justify-content: flex-start;
        gap: 0.75rem;
    }
    
    body.sidebar-collapsed .sidebar:hover .nav-link span {
        display: inline;
    }
    
    /* Shift the main content area by 75px to align next to the mini sidebar */
    body.sidebar-collapsed .main-content {
        margin-left: 75px;
    }
}

/* On Mobile/Tablet (small screens) */
@media (max-width: 991px) {
    .sidebar {
        left: calc(-1 * var(--sidebar-width));
    }
    .main-content {
        margin-left: 0;
        padding: 1.5rem;
    }
    
    /* When sidebar is opened on mobile */
    body.sidebar-open .sidebar {
        left: 0;
    }
    
    /* Overlay/backdrop for mobile */
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background-color: rgba(15, 23, 42, 0.5); /* translucent slate-900 */
        backdrop-filter: blur(4px);
        z-index: 1040;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }
    
    body.sidebar-open .sidebar-overlay {
        opacity: 1;
        visibility: visible;
    }
}