:root {
    --primary-color: #1a73e8;
    /* Google Blue */
    --primary-hover: #1557b0;
    --sidebar-width: 256px;
    --header-height: 64px;
    --bg-color: #f8f9fa;
    --text-color: #202124;
    --text-secondary: #5f6368;
    --border-color: #dadce0;
    --card-radius: 8px;
    --btn-radius: 4px;
    /* Material 2 is 4px, standard Google buttons often 4px or pill */
}

body {
    background-color: var(--bg-color);
    font-family: 'Roboto', 'Google Sans', sans-serif;
    color: var(--text-color);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

/* Navbar */
.navbar-custom {
    background-color: #fff;
    height: var(--header-height);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
    /* Google Header Shadow */
    border-bottom: none;
}

.navbar-brand-custom {
    font-size: 22px;
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Google Sans', sans-serif;
}

.navbar-brand-custom:hover {
    color: var(--text-color);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: var(--header-height);
    bottom: 0;
    left: 0;
    width: var(--sidebar-width);
    background-color: #fff;
    border-right: none;
    overflow-y: auto;
    padding-top: 16px;
    z-index: 1020;
    transition: transform 0.3s ease-in-out;
}

.sidebar .nav-link {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 24px;
    display: flex;
    align-items: center;
    border-radius: 0 24px 24px 0;
    margin-right: 16px;
    transition: background-color 0.2s, color 0.2s;
    letter-spacing: 0.25px;
}

.sidebar .nav-link:hover {
    background-color: #f1f3f4;
    color: var(--text-color);
}

.sidebar .nav-link.active {
    color: var(--primary-color);
    background-color: #e8f0fe;
}

.sidebar .nav-link i {
    margin-right: 16px;
    width: 20px;
    text-align: center;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--header-height);
    padding: 32px;
}

/* Cards */
.card {
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    box-shadow: none;
    background-color: #fff;
    margin-bottom: 24px;
    overflow: hidden;
    /* Ensure rounded corners clip content */
}

.card-header {
    background-color: #fff;
    border-bottom: 1px solid transparent;
    /* Cleaner look */
    padding: 20px 24px;
    font-size: 20px;
    /* Larger Google styled header */
    font-family: 'Google Sans', sans-serif;
    color: var(--text-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-body {
    padding: 24px;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: 'Google Sans', sans-serif;
    color: var(--text-color);
}

/* Buttons - Google Style */
.btn {
    font-family: 'Google Sans', 'Roboto', sans-serif;
    font-weight: 500;
    letter-spacing: 0.25px;
    text-transform: none;
    /* Google buttons are rarely uppercase now */
    border-radius: 4px;
    /* Material Design button radius */
    padding: 8px 24px;
    font-size: 14px;
    transition: box-shadow 0.2s, background-color 0.2s;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    box-shadow: 0 1px 3px 0 rgba(60, 64, 67, 0.3), 0 4px 8px 3px rgba(60, 64, 67, 0.15);
}

.btn-outline-secondary {
    color: var(--text-secondary);
    border-color: var(--border-color);
    background-color: transparent;
}

.btn-outline-secondary:hover {
    background-color: #f1f3f4;
    color: var(--text-color);
    border-color: var(--border-color);
}

/* Icon Buttons */
.btn-icon {
    padding: 8px;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: background-color 0.2s;
    border: none;
    background: transparent;
}

.btn-icon:hover {
    background-color: rgba(95, 99, 104, 0.1);
    /* Subtle hover circle */
    color: var(--text-color);
}

.btn-icon i {
    font-size: 16px;
}

/* Tables - Google Style */
.table-responsive {
    border-radius: 0 0 var(--card-radius) var(--card-radius);
}

.table {
    margin-bottom: 0;
    background-color: white;
}

.table th {
    font-weight: 500;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    font-size: 12px;
    /* Smaller, dense headers */
    text-transform: uppercase;
    /* Admin console style */
    letter-spacing: 0.5px;
    padding: 12px 24px;
    vertical-align: middle;
    background-color: #fff;
    /* White headers */
}

.table td {
    vertical-align: middle;
    color: var(--text-color);
    font-size: 14px;
    padding: 14px 24px;
    /* More padding for touch targets/clean look */
    border-bottom: 1px solid var(--border-color);
    border-top: none;
}

.table tr:hover td {
    background-color: #f8f9fa;
    /* Subtle hover */
}

.table tr:last-child td {
    border-bottom: none;
}

/* Badges */
.badge {
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 16px;
    /* Pill shaped */
    font-size: 12px;
}

.badge.bg-success {
    background-color: #e6f4ea !important;
    color: #137333;
}

.badge.bg-warning {
    background-color: #fef7e0 !important;
    color: #b06000;
}

.badge.bg-secondary {
    background-color: #f1f3f4 !important;
    color: #5f6368;
}

/* Form Controls */
.form-control,
.form-select {
    border-radius: 4px;
    border: 1px solid var(--border-color);
    padding: 10px 12px;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: none;
    border-width: 2px;
    padding: 9px 11px;
    /* Adjust for border width change to prevent shift */
}

.form-floating>.form-control:focus~label,
.form-floating>.form-control:not(:placeholder-shown)~label,
.form-floating>.form-select~label {
    color: var(--primary-color);
}

/* Text Utilities */
.text-gray-800 {
    color: var(--text-color) !important;
}

.text-gray-300 {
    color: #dadce0 !important;
}

.text-xs {
    font-size: 12px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        box-shadow: 0 0 16px rgba(0, 0, 0, 0.2);
    }

    .sidebar.show {
        transform: translateX(0);
    }

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