.json-tool-page {
    --json-ink: #162018;
    --json-muted: #5d6a5f;
    --json-line: rgba(220, 233, 214, 0.95);
    --json-soft: #f7faf6;
    --json-green: var(--primary-color, #7ed957);
    --json-green-dark: var(--secondary-color, #4a9c2d);
    min-height: 100vh;
    padding: 112px 0 64px;
    background:
        radial-gradient(circle at 8% 8%, rgba(126, 217, 87, 0.14), transparent 28%),
        radial-gradient(circle at 88% 12%, rgba(22, 32, 24, 0.07), transparent 30%),
        linear-gradient(180deg, #ffffff 0%, var(--json-soft) 100%);
    color: var(--json-ink);
}

.json-tool-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 2rem;
    align-items: end;
    margin-bottom: 1.6rem;
    padding: 1.25rem;
    border-radius: 20px;
    border-bottom: 1px solid var(--json-line);
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid var(--json-line);
    box-shadow: 0 18px 46px rgba(22, 32, 24, 0.07);
}

.json-back-link,
.json-kicker {
    display: inline-block;
    margin-bottom: 0.65rem;
    color: var(--json-green-dark);
    font-size: 0.8rem;
    font-weight: 850;
    letter-spacing: 0.11em;
    text-transform: uppercase;
    text-decoration: none;
}

.json-back-link:hover {
    color: var(--json-ink);
}

.json-tool-header h1 {
    margin: 0;
    color: var(--json-ink);
    font-size: clamp(2rem, 4vw, 3.45rem);
    line-height: 1.05;
    letter-spacing: 0;
}

.json-trust-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-top: 1rem;
}

.json-trust-row span {
    min-height: 30px;
    padding: 5px 11px;
    border-radius: 50px;
    border: 1px solid var(--json-line);
    background: #fff;
    color: var(--json-muted);
    font-size: 0.78rem;
    font-weight: 850;
}

.json-tool-header p {
    max-width: 620px;
    margin: 0.8rem 0 0;
    color: var(--json-muted);
    font-size: 1.02rem;
    line-height: 1.7;
}

.json-status-card {
    padding: 1rem;
    border-radius: 18px;
    background:
        radial-gradient(circle at 86% 18%, rgba(126, 217, 87, 0.18), transparent 30%),
        #fff;
    border: 1px solid var(--json-line);
    box-shadow: 0 12px 30px rgba(22, 32, 24, 0.06);
}

.json-status-card span {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--json-muted);
    font-weight: 800;
    font-size: 0.82rem;
}

.json-status-card strong {
    color: var(--json-ink);
    font-size: 1.35rem;
}

.json-status-card.valid strong {
    color: #027a48;
}

.json-status-card.invalid strong {
    color: #b42318;
}

.json-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px minmax(0, 1fr);
    gap: 1.15rem;
    align-items: stretch;
}

.json-panel,
.json-control-panel,
.json-tree-section,
.json-detail-card {
    background: #fff;
    border: 1px solid var(--json-line);
    border-radius: 20px;
    box-shadow: 0 16px 40px rgba(22, 32, 24, 0.075);
}

.json-panel,
.json-control-panel,
.json-tree-section {
    padding: 1rem;
}

.json-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.9rem;
}

.json-input-actions,
.json-output-toolbar,
.json-tree-tools {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.55rem;
    margin-bottom: 0.8rem;
}

.json-control-title {
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--json-line);
}

.json-control-title strong {
    display: block;
    color: var(--json-ink);
    font-size: 1.04rem;
}

.json-output-toolbar {
    justify-content: space-between;
    color: var(--json-muted);
    font-size: 0.82rem;
    font-weight: 800;
}

.json-tree-tools {
    justify-content: flex-end;
    margin-bottom: 0;
}

.json-tree-tools input {
    min-height: 38px;
    width: min(280px, 100%);
    border-radius: 50px;
    border: 1px solid var(--json-line);
    padding: 0 0.85rem;
    color: var(--json-ink);
    font: inherit;
}

.json-file-button,
.json-mini-button {
    min-height: 36px;
    padding: 0 0.8rem;
    border-radius: 50px;
    border: 1px solid var(--json-line);
    background: #fff;
    color: var(--json-green-dark);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font: inherit;
    font-size: 0.84rem;
    font-weight: 850;
    cursor: pointer;
}

.json-file-button:hover,
.json-mini-button:hover,
.json-icon-button:hover,
.json-action:hover {
    border-color: var(--json-green);
    box-shadow: 0 8px 18px rgba(126, 217, 87, 0.13);
}

.json-input-actions input[type="file"] {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.json-panel-header h2 {
    margin: 0;
    color: var(--json-ink);
    font-size: 1.15rem;
}

.json-kicker {
    margin-bottom: 0.2rem;
    font-size: 0.72rem;
}

.json-icon-button {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    border: 1px solid var(--json-line);
    background: var(--json-soft);
    color: var(--json-green-dark);
    display: grid;
    place-items: center;
    cursor: pointer;
}

.json-icon-button svg {
    width: 21px;
    height: 21px;
}

.json-panel textarea,
.json-output {
    width: 100%;
    min-height: 430px;
    max-height: 58vh;
    margin: 0;
    padding: 1rem;
    border-radius: 16px;
    border: 1px solid var(--json-line);
    background: linear-gradient(180deg, #ffffff 0%, #fbfdfb 100%);
    color: #101828;
    font-family: Consolas, Monaco, "Courier New", monospace;
    font-size: 0.92rem;
    line-height: 1.6;
    overflow: auto;
    resize: vertical;
    white-space: pre;
}

.json-panel textarea:focus {
    outline: 2px solid rgba(126, 217, 87, 0.4);
    border-color: var(--json-green);
}

.json-output {
    resize: none;
}

.json-control-panel {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.json-control-group {
    display: grid;
    gap: 0.4rem;
}

.json-control-group label {
    color: var(--json-muted);
    font-weight: 800;
    font-size: 0.85rem;
}

.json-control-group select {
    min-height: 42px;
    border-radius: 14px;
    border: 1px solid var(--json-line);
    padding: 0 0.75rem;
    background: #fff;
    font: inherit;
}

.json-action {
    min-height: 44px;
    border-radius: 50px;
    border: 1px solid var(--json-line);
    background: #fff;
    color: var(--json-ink);
    font: inherit;
    font-weight: 850;
    cursor: pointer;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.json-action.primary {
    border: 0;
    color: #fff;
    background: linear-gradient(135deg, var(--json-green), var(--json-green-dark));
    box-shadow: 0 8px 22px rgba(126, 217, 87, 0.24);
}

.json-action.primary:hover {
    transform: translateY(-2px);
}

.json-message {
    margin-top: auto;
    padding: 0.85rem;
    border-radius: 16px;
    background: var(--json-soft);
    color: var(--json-muted);
    font-size: 0.86rem;
    line-height: 1.5;
}

.json-message.error {
    background: #fef3f2;
    color: #b42318;
}

.json-message.success {
    background: #ecfdf3;
    color: #027a48;
}

.json-details-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.json-detail-card {
    padding: 1rem;
    background:
        linear-gradient(180deg, #ffffff 0%, #fbfdfb 100%);
}

.json-detail-card span {
    display: block;
    color: var(--json-muted);
    font-weight: 800;
    font-size: 0.84rem;
}

.json-detail-card strong {
    display: block;
    margin-top: 0.3rem;
    color: var(--json-ink);
    font-size: 1.35rem;
}

.json-tree-section {
    margin-top: 1rem;
}

.json-tree {
    max-height: 360px;
    overflow: auto;
    padding: 1rem;
    border-radius: 16px;
    border: 1px solid var(--json-line);
    background: linear-gradient(180deg, #ffffff 0%, #fbfdfb 100%);
    color: var(--json-muted);
    font-family: Consolas, Monaco, "Courier New", monospace;
    font-size: 0.9rem;
    line-height: 1.65;
}

.json-tree details {
    margin-left: 1rem;
}

.json-tree summary {
    cursor: pointer;
    color: var(--json-ink);
    font-weight: 800;
}

.json-tree .json-key {
    color: #175cd3;
}

.json-tree .json-string {
    color: #027a48;
}

.json-tree .json-number,
.json-tree .json-boolean {
    color: #b54708;
}

.json-tree .json-null {
    color: #667085;
}

.json-tree mark {
    padding: 0.05rem 0.18rem;
    border-radius: 5px;
    background: #fef08a;
    color: #713f12;
}

@media (max-width: 1100px) {
    .json-workspace {
        grid-template-columns: 1fr;
    }

    .json-control-panel {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        align-items: end;
    }

    .json-message {
        grid-column: 1 / -1;
    }
}

@media (max-width: 760px) {
    .json-tool-page {
        padding: 96px 0 48px;
    }

    .json-tool-header {
        grid-template-columns: 1fr;
    }

    .json-control-panel,
    .json-details-grid {
        grid-template-columns: 1fr;
    }

    .json-tree-tools {
        justify-content: flex-start;
    }

    .json-tree-tools input,
    .json-mini-button,
    .json-file-button {
        width: 100%;
    }

    .json-panel textarea,
    .json-output {
        min-height: 320px;
    }
}

.json-seo-section {
    padding: 72px 0;
    background: #f7faf6;
    color: #162018;
}

.json-seo-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
    gap: 28px;
    align-items: stretch;
}

.json-seo-grid article,
.json-seo-grid aside,
.json-faq {
    border: 1px solid var(--json-line);
    border-radius: 20px;
    background: #fff;
    box-shadow: 0 16px 40px rgba(22, 32, 24, 0.07);
    padding: 24px;
}

.json-seo-kicker {
    display: inline-block;
    margin-bottom: 10px;
    color: var(--json-green-dark);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.json-seo-section h2,
.json-seo-section h3 {
    color: #162018;
    margin-bottom: 12px;
}

.json-seo-section p,
.json-seo-section li {
    color: #5d6a5f;
    line-height: 1.75;
}

.json-seo-section ul {
    padding-left: 20px;
}

.json-faq {
    margin-top: 24px;
}

.json-faq details {
    border-top: 1px solid var(--json-line);
    padding: 14px 0;
}

.json-faq details:first-of-type {
    border-top: 0;
}

.json-faq summary {
    cursor: pointer;
    color: #162018;
    font-weight: 850;
}

@media (max-width: 760px) {
    .json-seo-grid {
        grid-template-columns: 1fr;
    }
}