/* Modern Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: var(--surface);
    padding: 20px 30px;
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.header h1 {
    color: var(--primary-color);
    font-size: 28px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
}

.header h1 i {
    font-size: 32px;
}

.header-actions {
    display: flex;
    gap: 10px;
}

/* Card */
.card {
    background: var(--surface);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    margin-bottom: 30px;
    overflow: hidden;
}

.card-header {
    padding: 20px 30px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.card-header h2 {
    color: white;
    font-size: 20px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 30px;
}

/* Form Styles */
.license-form {
    width: 100%;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    align-items: end;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.form-group input[type="text"] {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: var(--surface);
}

.form-group input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #475569;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-icon {
    padding: 8px 12px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
}

.btn-update {
    background: var(--warning-color);
    color: white;
}

.btn-update:hover {
    background: #d97706;
    transform: scale(1.1);
}

.btn-delete {
    background: var(--danger-color);
    color: white;
}

.btn-delete:hover {
    background: #dc2626;
    transform: scale(1.1);
}

/* Modern Table */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.modern-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.modern-table thead {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.modern-table thead th {
    padding: 16px;
    text-align: left;
    color: white;
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.modern-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.modern-table tbody tr:hover {
    background: #f1f5f9;
    transform: scale(1.01);
    box-shadow: var(--shadow-sm);
}

.modern-table tbody td {
    padding: 16px;
    color: var(--text-primary);
}

.modern-table tbody td:first-child {
    font-weight: 700;
    color: var(--primary-color);
}

/* MAC Address Styles */
.mac-address {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 13px;
}

.mac-active {
    background: #d1fae5;
    color: #065f46;
}

.mac-active:hover {
    background: #a7f3d0;
    transform: scale(1.05);
}

.mac-reset {
    background: #fee2e2;
    color: #991b1b;
}

.mac-reset:hover {
    background: #fecaca;
    transform: scale(1.05);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 8px;
    justify-content: center;
}

/* No Data */
.no-data {
    text-align: center;
    padding: 40px !important;
    color: var(--text-secondary);
    font-style: italic;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: -100px;
    right: 20px;
    padding: 16px 24px;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    box-shadow: var(--shadow-xl);
    transition: bottom 0.3s ease;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 300px;
}

.toast.show {
    bottom: 20px;
}

.toast-success {
    background: var(--success-color);
}

.toast-error {
    background: var(--danger-color);
}

.toast-info {
    background: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    .header {
        padding: 15px 20px;
        flex-direction: column;
        align-items: flex-start;
    }

    .header h1 {
        font-size: 22px;
    }

    .header-actions {
        width: 100%;
        justify-content: space-between;
    }

    .header-actions .btn {
        flex: 1;
    }

    .card-body {
        padding: 20px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .modern-table {
        font-size: 12px;
    }

    .modern-table thead th,
    .modern-table tbody td {
        padding: 12px 8px;
    }

    .action-buttons {
        flex-direction: column;
        gap: 5px;
    }

    .toast {
        right: 10px;
        left: 10px;
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 18px;
    }

    .header h1 i {
        font-size: 24px;
    }

    .card-header h2 {
        font-size: 16px;
    }

    /* Make table scrollable on very small screens */
    .modern-table thead th:nth-child(5),
    .modern-table tbody td:nth-child(5) {
        display: none;
    }
}

/* Legacy Login Form Support */
#frm {
    border: solid gray 1px;
    width: 90%;
    max-width: 400px;
    border-radius: 12px;
    margin: 120px auto;
    background: white;
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

#btn {
    color: #fff;
    background: var(--primary-color);
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    width: 100%;
}

#btn:hover {
    background: var(--primary-dark);
}