:root {
    --bg: #f5f7fb;
    --card: #ffffff;
    --border: #d6dde8;
    --border-strong: #b8c2d3;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #0f766e;
    --text: #1f2937;
    --muted: #4b5563;
    --error: #dc2626;
    --success: #15803d;
    --radius: 16px;
    --shadow: 0 22px 45px -24px rgba(15, 23, 42, 0.35);
    --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font);
    background: linear-gradient(135deg, #eef2ff 0%, #f9fafb 100%);
    color: var(--text);
    min-height: 100vh;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

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

main.layout {
    max-width: 960px;
    margin: 0 auto;
    padding: 3rem 1.5rem 4rem;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.top-bar h1 {
    font-size: 1.9rem;
    font-weight: 700;
    margin: 0;
}

.inline-form {
    margin: 0;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 999px;
    border: 1px solid transparent;
    padding: 0.85rem 1.6rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.2s ease, background 0.2s ease, border 0.2s ease;
    text-decoration: none;
}

.button:hover {
    transform: translateY(-1px);
}

.button:disabled,
.button[disabled] {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.button.primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 16px 30px -20px rgba(37, 99, 235, 0.8);
}

.button.secondary {
    background: rgba(37, 99, 235, 0.07);
    color: var(--primary);
    border-color: rgba(37, 99, 235, 0.12);
}

.button.ghost {
    background: transparent;
    border-color: var(--border);
    color: var(--muted);
}

.button.danger {
    background: rgba(220, 38, 38, 0.08);
    color: var(--error);
    border-color: rgba(220, 38, 38, 0.2);
}

.button.full {
    width: 100%;
    justify-content: center;
}

.tabs {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
    padding: 0.35rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.65);
    border: 1px solid rgba(148, 163, 184, 0.25);
}

.tabs a {
    padding: 0.6rem 1.6rem;
    border-radius: 999px;
    font-weight: 600;
    color: var(--muted);
    transition: background 0.2s ease, color 0.2s ease;
}

.tabs a:hover {
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary);
}

.tabs a.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
}

.card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 2.25rem;
    box-shadow: var(--shadow);
    border: 1px solid rgba(148, 163, 184, 0.18);
}

.card h2 {
    margin-top: 0;
    font-size: 1.45rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.form {
    display: flex;
    flex-direction: column;
    gap: 1.4rem;
}

.slim-form {
    gap: 1.1rem;
}

.form label span,
fieldset legend {
    display: block;
    font-weight: 600;
    margin-bottom: 0.45rem;
}

.form input[type="password"],
.form input[type="number"],
.form input[type="text"],
.form input[type="search"],
.form select {
    width: 100%;
    padding: 0.85rem 0.95rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 1rem;
    transition: border 0.2s ease, box-shadow 0.2s ease;
    background: #fff;
}

.range-field .range-inputs {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.range-field .range-inputs select {
    flex: 0 0 150px;
    width: 150px;
    min-width: 150px;
    max-width: 150px;
}

.range-field .range-separator {
    color: var(--muted);
    font-size: 0.95rem;
    font-weight: 600;
}

.range-field {
    grid-column: span 2;
    min-width: 100%;
}

.compact-control {
    max-width: 150px;
}

.compact-control select,
.compact-control input {
    width: 150px;
    max-width: 150px;
}

.form input:focus,
.form select:focus {
    outline: none;
    border-color: rgba(37, 99, 235, 0.55);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form fieldset {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem;
    display: grid;
    gap: 0.65rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.25rem;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
}

.checkbox.inline {
    flex-direction: row;
}

.checkbox input {
    width: 1.1rem;
    height: 1.1rem;
}

.alert {
    margin-bottom: 1.1rem;
    padding: 1rem 1.25rem;
    border-radius: 12px;
    font-weight: 500;
    border: 1px solid transparent;
}

.alert-error {
    background: rgba(220, 38, 38, 0.1);
    border-color: rgba(220, 38, 38, 0.15);
    color: var(--error);
}

.alert-success {
    background: rgba(22, 163, 74, 0.12);
    border-color: rgba(22, 163, 74, 0.18);
    color: var(--success);
}

.alert-info {
    background: rgba(37, 99, 235, 0.12);
    border-color: rgba(37, 99, 235, 0.18);
    color: var(--primary-dark);
}

.help-text {
    color: var(--muted);
    font-size: 0.9rem;
    margin: 0.35rem 0 0;
    display: block;
}

.field-block {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.field-help {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.help-text.warning {
    color: var(--error);
    font-weight: 600;
}

.demo-preview {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 1.1rem 1.3rem;
    border-radius: 14px;
    border: 1px solid rgba(37, 99, 235, 0.18);
    background: rgba(37, 99, 235, 0.05);
}

.demo-preview strong {
    display: block;
}

.demo-preview p {
    margin: 0.3rem 0 0;
    font-family: 'Fira Code', Consolas, monospace;
    font-size: 1.05rem;
    letter-spacing: 0.08em;
}

.demo-regex {
    margin: 0.35rem 0 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
    font-size: 0.95rem;
    color: var(--muted);
}

.demo-regex code {
    font-family: 'Fira Code', Consolas, monospace;
    font-size: 0.95rem;
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary-dark);
    padding: 0.2rem 0.5rem;
    border-radius: 8px;
    letter-spacing: 0.03em;
}

.demo-regex-label {
    font-weight: 600;
    color: var(--primary-dark);
}

.form-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
}

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

.form-actions .button {
    flex: 0 0 auto;
    min-width: 150px;
}

.pattern-controls {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.1rem;
}

.pattern-controls .checkbox {
    font-weight: 500;
    color: var(--muted);
}

.pattern-status {
    margin: 0;
    font-size: 0.95rem;
    padding: 0.65rem 0.85rem;
    border-radius: 12px;
    border: 1px solid rgba(37, 99, 235, 0.18);
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary-dark);
}

.pattern-status--warning {
    background: rgba(220, 38, 38, 0.12);
    border-color: rgba(220, 38, 38, 0.2);
    color: var(--error);
}

.pattern-status--info {
    background: rgba(37, 99, 235, 0.1);
    border-color: rgba(37, 99, 235, 0.18);
    color: var(--primary-dark);
}

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

.accordion-item {
    border: 1px solid rgba(148, 163, 184, 0.25);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 18px 32px -30px rgba(15, 23, 42, 0.45);
}

.accordion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 1.5rem;
    gap: 1.2rem;
    cursor: pointer;
}

.accordion-header h3 {
    margin: 0 0 0.3rem;
    font-size: 1.1rem;
}

.accordion-header p {
    margin: 0.15rem 0 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.accordion-header .meta {
    font-size: 0.85rem;
}

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

.accordion-actions .inline-form {
    margin: 0;
}

.accordion-actions .button {
    min-width: 150px;
    justify-content: center;
}

.accordion-content {
    border-top: 1px solid rgba(148, 163, 184, 0.2);
    padding: 1.4rem 1.5rem 1.2rem;
}

.accordion-content ul {
    list-style: none;
    padding: 0;
    margin: 0 0 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.accordion-content li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 0.9rem 1rem;
    border: 1px dashed rgba(148, 163, 184, 0.35);
    border-radius: 12px;
}

.accordion-content li div {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.accordion-content strong {
    font-weight: 600;
}

.accordion-content small {
    color: var(--muted);
    font-size: 0.85rem;
}

.disabled-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    margin: 1.4rem 0 1.6rem;
}

.disabled-controls input[type="search"] {
    flex: 1 1 260px;
    padding: 0.85rem 0.95rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 1rem;
    transition: border 0.2s ease, box-shadow 0.2s ease;
}

.disabled-controls input[type="search"]:focus {
    outline: none;
    border-color: rgba(37, 99, 235, 0.55);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.disabled-table-wrapper {
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.96);
    overflow: hidden;
}

.empty-state {
    padding: 2rem 1.6rem;
    text-align: center;
    color: var(--muted);
    font-weight: 500;
    font-size: 0.95rem;
}

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

.disabled-table thead {
    background: rgba(248, 250, 252, 0.85);
}

.disabled-table th,
.disabled-table td {
    padding: 1rem 1.4rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.2);
    vertical-align: middle;
}

.disabled-table th {
    text-align: left;
    font-size: 0.92rem;
    color: var(--muted);
    font-weight: 600;
    letter-spacing: 0.01em;
}

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

.pattern-label {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.pattern-label .pattern-id {
    color: var(--muted);
    font-size: 0.85rem;
    font-weight: 500;
}

.actions-col {
    text-align: right;
    white-space: nowrap;
}

.icon-button {
    gap: 0.45rem;
    padding: 0.55rem 1rem;
    border-radius: 999px;
}

.icon-button .icon {
    width: 1.05rem;
    height: 1.05rem;
}

.icon-button span {
    font-size: 0.95rem;
    font-weight: 600;
}

@media (max-width: 760px) {
    main.layout {
        padding: 2.5rem 1.1rem 3rem;
    }

    .top-bar {
        flex-direction: column;
        align-items: flex-start;
    }

    .card {
        padding: 1.8rem;
    }

    .accordion-content li {
        flex-direction: column;
        align-items: flex-start;
    }

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

    .button {
        padding: 0.75rem 1.2rem;
    }

    .disabled-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .disabled-controls input[type="search"] {
        width: 100%;
    }

    .actions-col {
        text-align: left;
    }
}