:root {
    /* Modern Palette - Indigo/Slate Theme */
    --primary-color: #4f46e5;
    /* Indigo 600 */
    --primary-hover: #4338ca;
    /* Indigo 700 */
    --secondary-color: #64748b;
    /* Slate 500 */
    --background-color: #f8fafc;
    /* Slate 50 */
    --surface-color: #ffffff;
    --text-color: #1e293b;
    /* Slate 800 */
    --text-light: #64748b;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;

    --border-color: #e2e8f0;
    --border-radius: 12px;
    --nav-height: 70px;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    --transition: all 0.3s ease;
}

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

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: 'Outfit', sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

/* Layout & Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header & Nav */
.header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    height: var(--nav-height);
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    position: relative;
    /* Ensure absolute children position relative to this if needed, or keeping it clean */
}

.nav-links a {
    font-weight: 500;
    color: var(--text-light);
    font-size: 0.95rem;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-color);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

h1 {
    font-size: 1.8rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

/* Cards */
.card {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    margin-bottom: 1.5rem;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(79, 70, 229, 0.2);
    transition: var(--transition);
    font-size: 0.95rem;
}

.btn:hover {
    background: linear-gradient(135deg, var(--primary-hover), var(--primary-color));
    /* Flip gradient slightly or darken */
    transform: translateY(-1px);
    box-shadow: 0 6px 12px rgba(79, 70, 229, 0.3);
}

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

.btn-secondary:hover {
    background: var(--background-color);
    border-color: #cbd5e1;
    box-shadow: var(--shadow-md);
}

.btn-danger {
    background: var(--danger-color);
    box-shadow: 0 4px 6px rgba(239, 68, 68, 0.2);
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background: var(--background-color);
    transition: var(--transition);
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    background: white;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Auth */
.auth-wrapper {
    min-height: 80vh;
    /* Centered nicely */
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.auth-card {
    background: var(--surface-color);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
    border: 1px solid var(--border-color);
}

.auth-title {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
    font-size: 1.75rem;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
}

th {
    text-align: left;
    padding: 1rem;
    background: #f1f5f9;
    font-weight: 600;
    color: var(--text-light);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

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

tr:hover td {
    background-color: #f8fafc;
}

/* Badges */
.badge {
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .mobile-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        border-bottom: 1px solid var(--border-color);
        gap: 0;
    }

    .nav-links.active {
        display: flex;
        animation: slideDown 0.3s ease-out forwards;
    }

    .nav-links>a,
    .nav-links .dropdown-trigger {
        width: 100%;
        padding: 1rem 0;
        border-bottom: 1px solid #f1f5f9;
        font-size: 1.1rem;
        /* Larger touch target */
    }

    .nav-links .dropdown {
        width: 100%;
        display: block;
        /* Stack vertically */
        height: auto;
    }

    /* Dropdown on Mobile */
    .dropdown-content {
        position: static;
        /* Flow in document */
        box-shadow: none;
        border: none;
        padding-left: 1rem;
        margin-top: 0;
        display: none;
        width: 100%;
        opacity: 1;
        /* Override fade animation */
        transform: none;
    }

    .dropdown.open .dropdown-content {
        display: block;
    }

    .dropdown:hover .dropdown-content {
        display: none;
        /* Disable hover on mobile */
    }

    .dropdown.open:hover .dropdown-content {
        display: block;
    }

    .header:hover .nav-links {
        display: none;
        /* Override any demo hover */
    }

    .header .nav-links.active {
        display: flex;
    }

    /* Make grid 1 col */
    .card-grid {
        grid-template-columns: 1fr;
    }

    /* Stack flex containers in forms */
    .auth-card {
        padding: 1.5rem;
    }

    td,
    th {
        padding: 0.75rem 0.5rem;
        font-size: 0.9rem;
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Utilities */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.d-none {
    display: none;
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.flex {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.items-center {
    align-items: center;
}

/* Dropdown Menu */
.dropdown {
    position: relative;
    height: 100%;
    /* Match header height */
    display: flex;
    align-items: center;
}

.dropdown-trigger {
    padding: 0.5rem 0;
    /* Increase hit area */
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    /* Directly below */
    left: 0;
    background-color: var(--surface-color);
    min-width: 220px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    /* Stronger shadow */
    border-radius: var(--border-radius);
    padding: 0.5rem;
    /* Inner padding */
    z-index: 9999;
    border: 1px solid var(--border-color);
    margin-top: 0.5rem;
    /* Visual gap */
    transform-origin: top left;
}

/* Bridge to prevent closing when crossing the gap */
.dropdown::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    /* Extend invisible hit area down */
    left: 0;
    width: 100%;
    height: 1rem;
}

.dropdown:hover .dropdown-content {
    display: block;
    animation: dropdownSlide 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.dropdown-content a {
    color: var(--text-color);
    padding: 0.75rem 1rem;
    text-decoration: none;
    display: flex;
    /* Align icons */
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    border-radius: 8px;
    /* Inner rounding */
    margin-bottom: 2px;
    border-bottom: none;
    /* Removed border */
    transition: all 0.15s ease;
}

.dropdown-content a i {
    color: var(--secondary-color);
    width: 20px;
    text-align: center;
    transition: color 0.15s ease;
}

.dropdown-content a:hover {
    background-color: #e0e7ff;
    /* Light indigo */
    color: var(--primary-color);
    transform: translateX(3px);
    /* Usage feedback */
}

.dropdown-content a:hover i {
    color: var(--primary-color);
}

@keyframes dropdownSlide {
    from {
        opacity: 0;
        transform: translateY(-8px) scale(0.98);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}