:root {
    --bg: #f4f6f9;
    --surface: #ffffff;
    --text: #1a1d26;
    --muted: #6b7280;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --border: #e5e7eb;
    --success: #059669;
    --danger: #dc2626;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: min(1100px, 94%);
    margin: 0 auto;
}

.header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
}

.nav-link {
    color: var(--text);
    text-decoration: none;
    padding: 0.45rem 0.8rem;
    border-radius: 8px;
    font-size: 0.9rem;
}

.nav-link:hover {
    background: #f3f4f6;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand-icon {
    font-size: 1.5rem;
}

.brand small {
    display: block;
    color: var(--muted);
}

.logout-form {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-badge {
    color: var(--muted);
    font-size: 0.9rem;
}

.main-content {
    flex: 1;
    padding: 2rem 0 3rem;
}

.footer {
    padding: 1.25rem 0;
    text-align: center;
    color: var(--muted);
    border-top: 1px solid var(--border);
    background: var(--surface);
}

.page-header {
    margin-bottom: 1.5rem;
}

.page-header-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.page-header h1,
.auth-header h1 {
    margin: 0 0 0.5rem;
    font-size: 1.75rem;
}

.page-header p,
.auth-header p {
    margin: 0;
    color: var(--muted);
}

.card,
.auth-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.auth-card {
    max-width: 420px;
    margin: 3rem auto;
}

.form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-control {
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-hint {
    color: var(--muted);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.7rem 1.1rem;
    border-radius: 8px;
    border: 1px solid transparent;
    font-size: 0.95rem;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s ease, border-color 0.15s ease;
}

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

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

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

.btn-outline:hover {
    background: #f9fafb;
}

.btn-sm {
    padding: 0.45rem 0.75rem;
    font-size: 0.85rem;
}

.btn-block {
    width: 100%;
}

.alert {
    margin-top: 1rem;
    padding: 0.9rem 1rem;
    border-radius: 8px;
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-success {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.field-error {
    color: var(--danger);
    font-size: 0.85rem;
}

.result-card {
    margin-top: 1.5rem;
}

.result-card h2 {
    margin-top: 0;
    font-size: 1.1rem;
}

.license-key-box {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    background: #f8fafc;
    border: 1px dashed var(--border);
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0;
}

.license-key-box code {
    flex: 1;
    word-break: break-all;
    font-size: 0.9rem;
    line-height: 1.5;
}

.verification {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
}

.verification.verified {
    background: #ecfdf5;
    color: #065f46;
}

.verification.failed {
    background: #fef2f2;
    color: #991b1b;
}

.badge {
    display: inline-block;
    margin-left: 0.5rem;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-muted {
    background: #f3f4f6;
    color: #6b7280;
}

.muted {
    color: var(--muted);
}

.meta-text {
    display: block;
    color: var(--muted);
    font-size: 0.8rem;
}

.filter-form {
    display: grid;
    grid-template-columns: 1fr 180px auto auto;
    gap: 1rem;
    align-items: end;
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.form-check {
    flex-direction: row;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.table-card {
    margin-top: 1rem;
    padding: 0;
    overflow: hidden;
}

.table-responsive {
    overflow-x: auto;
}

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

.data-table th,
.data-table td {
    padding: 0.85rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

.data-table th {
    background: #f9fafb;
    font-size: 0.85rem;
    color: var(--muted);
    font-weight: 600;
}

.data-table tbody tr:hover {
    background: #fafbfc;
}

.actions-cell {
    white-space: nowrap;
}

.table-footer,
.empty-state {
    padding: 1rem;
    margin: 0;
    color: var(--muted);
}

.detail-list {
    margin: 0;
}

.detail-row {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-row dt {
    color: var(--muted);
    font-weight: 500;
}

.detail-row dd {
    margin: 0;
}

.meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    padding: 1rem;
    background: #f9fafb;
    border-radius: 8px;
}

.meta-grid p {
    margin: 0.25rem 0 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.inline-form {
    margin-top: 1rem;
}

.danger-zone {
    margin-top: 1.5rem;
    border-color: #fecaca;
}

.danger-zone h3 {
    margin-top: 0;
    color: #991b1b;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
    border-color: var(--danger);
}

.btn-danger:hover {
    background: #b91c1c;
}

@media (max-width: 600px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .main-nav {
        margin-left: 0;
        width: 100%;
    }

    .license-key-box {
        flex-direction: column;
    }

    .filter-form {
        grid-template-columns: 1fr;
    }

    .detail-row {
        grid-template-columns: 1fr;
        gap: 0.25rem;
    }

    .meta-grid {
        grid-template-columns: 1fr;
    }
}