:root {
    --primary: #c4fb6d; /* Neon green/yellow */
    --primary-dark: #a8e04d;
    --bg-dark: #0f172a;
    --card-bg: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --accent: #38bdf8;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
}

.login-container {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at top right, #1e293b, #0f172a);
}

.login-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 1.5rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    font-size: 1.8rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: #0f172a;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    color: white;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(196, 251, 109, 0.1);
}

.btn {
    width: 100%;
    padding: 0.75rem;
    border-radius: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.1s, opacity 0.2s;
    border: none;
}

.btn-primary {
    background-color: var(--primary);
    color: #000;
}

.btn-primary:hover {
    transform: translateY(-1px);
    opacity: 0.9;
}

.alert {
    padding: 0.75rem;
    border-radius: 0.75rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}


.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Layout & Dashboard */
.main-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    background: var(--card-bg);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
}

.sidebar-brand {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 3rem;
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    list-style: none;
    flex: 1;
}

.nav-item {
    margin-bottom: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    text-decoration: none;
    color: var(--text-muted);
    border-radius: 0.75rem;
    transition: all 0.2s;
    font-weight: 500;
}

.nav-link:hover, .nav-link.active {
    background: rgba(196, 251, 109, 0.1);
    color: var(--primary);
}

.main-content {
    flex: 1;
    padding: 2.5rem;
    background: var(--bg-dark);
}

.page-header {
    margin-bottom: 2.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
}

.stat-card .label {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}


.stat-card .value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
}

/* Tables & Data */
.table-container {
    background: var(--card-bg);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

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

th {
    text-align: left;
    padding: 1rem 1.5rem;
    background: rgba(15, 23, 42, 0.5);
    color: var(--text-muted);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

td {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 0.95rem;
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-active {
    background: rgba(196, 251, 109, 0.1);
    color: var(--primary);
}

.badge-inactive {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.875rem;
}