.jfl-tool {
    --jfl-bg: #f5f7fb;
    --jfl-panel: #ffffff;
    --jfl-panel-2: #f8fafc;
    --jfl-text: #132033;
    --jfl-muted: #627084;
    --jfl-border: #dbe3ee;
    --jfl-accent: #246bfe;
    --jfl-accent-2: #13a88b;
    --jfl-danger: #c33126;
    --jfl-success: #147a4a;
    --jfl-code: #111827;
    --jfl-line: #8b97a8;
    --jfl-shadow: 0 22px 70px rgba(15, 23, 42, 0.1);
    background:
        radial-gradient(circle at 18% 0%, rgba(36, 107, 254, 0.12), transparent 30%),
        radial-gradient(circle at 88% 6%, rgba(19, 168, 139, 0.14), transparent 28%),
        var(--jfl-bg);
    color: var(--jfl-text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
    max-width: none;
    min-height: 100vh;
    padding: 30px clamp(14px, 2vw, 30px);
    width: 100vw;
}

.jfl-tool[data-theme="dark"] {
    --jfl-bg: #0f131a;
    --jfl-panel: #171d26;
    --jfl-panel-2: #1e2631;
    --jfl-text: #eef4ff;
    --jfl-muted: #a8b4c4;
    --jfl-border: #303b4b;
    --jfl-accent: #72a4ff;
    --jfl-accent-2: #4dd4bb;
    --jfl-danger: #ff8a80;
    --jfl-success: #66d19a;
    --jfl-code: #f8fbff;
    --jfl-line: #78869a;
    --jfl-shadow: 0 22px 70px rgba(0, 0, 0, 0.28);
}

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

.jfl-hero {
    align-items: flex-start;
    display: flex;
    gap: 18px;
    justify-content: space-between;
    margin: 0 auto 24px;
    max-width: 1280px;
    padding: 0 12px;
    text-align: left;
    width: 100%;
}

.jfl-hero-copy {
    max-width: 820px;
    margin: 0;
}

.jfl-hero-action {
    align-self: flex-start;
}

.jfl-hero-action .jfl-theme-toggle {
    margin: 0;
}

@media (max-width: 900px) {
    .jfl-hero {
        justify-content: center;
        text-align: center;
    }

    .jfl-hero-action {
        width: 100%;
        display: flex;
        justify-content: center;
        margin-top: 18px;
    }
}
.jfl-kicker {
    color: var(--jfl-accent);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0;
    margin: 0 0 10px;
    text-transform: uppercase;
}

.jfl-hero h1 {
    color: var(--jfl-text);
    font-size: clamp(2.1rem, 5vw, 4.4rem);
    letter-spacing: 0;
    line-height: 1;
    margin: 0;
}

.jfl-hero p:not(.jfl-kicker) {
    color: var(--jfl-muted);
    font-size: 1.02rem;
    line-height: 1.65;
    margin: 14px 0 0;
}

.jfl-hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.jfl-hero-badges span {
    background: rgba(36, 107, 254, 0.1);
    border: 1px solid rgba(36, 107, 254, 0.18);
    border-radius: 999px;
    color: var(--jfl-text);
    font-size: 0.84rem;
    font-weight: 700;
    padding: 7px 10px;
}

.jfl-theme-toggle {
    align-items: center;
    background: linear-gradient(135deg, var(--jfl-panel), var(--jfl-panel-2));
    border: 1px solid var(--jfl-border);
    border-radius: 999px;
    box-shadow: var(--jfl-shadow);
    color: var(--jfl-text);
    cursor: pointer;
    display: inline-flex;
    gap: 8px;
    min-height: 42px;
    padding: 6px 12px 6px 7px;
}

.jfl-theme-toggle span {
    background: linear-gradient(135deg, var(--jfl-accent), var(--jfl-accent-2));
    border-radius: 50%;
    display: inline-block;
    height: 28px;
    width: 28px;
}

.jfl-theme-toggle b {
    font-size: 0.86rem;
}

.jfl-ad-space {
    align-items: center;
    background: rgba(255, 255, 255, 0.5);
    border: 1px dashed var(--jfl-border);
    border-radius: 8px;
    color: var(--jfl-muted);
    display: flex;
    justify-content: center;
    margin-bottom: 18px;
    min-height: 108px;
}

.jfl-tool[data-theme="dark"] .jfl-ad-space {
    background: rgba(255, 255, 255, 0.03);
}

.jfl-ad-space::before {
    content: "Advertisement";
    font-size: 0.82rem;
    opacity: 0.75;
}

.jfl-page-grid {
    align-items: start;
    display: grid;
    gap: clamp(14px, 1.6vw, 24px);
    grid-template-columns: minmax(0, 1fr);
    margin: 0 auto;
    max-width: 1280px;
    width: 100%;
}

.jfl-main-column {
    min-width: 0;
    width: 100%;
    margin: 0 auto;
}

.jfl-main-column {
    min-width: 0;
    width: 100%;
}

.jfl-side-ad {
    display: none;
}

.jfl-tool[data-theme="dark"] .jfl-side-ad {
    background:
        linear-gradient(180deg, rgba(114, 164, 255, 0.1), rgba(77, 212, 187, 0.07)),
        rgba(255, 255, 255, 0.03);
}

.jfl-side-ad::before {
    content: "Side Ad";
    font-size: 0.82rem;
    opacity: 0.78;
    writing-mode: vertical-rl;
}

.jfl-app {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.52));
    border: 1px solid rgba(219, 227, 238, 0.9);
    border-radius: 8px;
    box-shadow: var(--jfl-shadow);
    padding: 14px;
}

.jfl-tool[data-theme="dark"] .jfl-app {
    background: linear-gradient(145deg, rgba(23, 29, 38, 0.94), rgba(30, 38, 49, 0.78));
    border-color: var(--jfl-border);
}

.jfl-toolbar {
    align-items: center;
    background: rgba(255, 255, 255, 0.86);
    border: 1px solid var(--jfl-border);
    border-radius: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    padding: 10px;
    position: sticky;
    top: 10px;
    z-index: 5;
}

.jfl-tool[data-theme="dark"] .jfl-toolbar {
    background: rgba(23, 29, 38, 0.92);
}

.jfl-tabs {
    background: var(--jfl-panel-2);
    border: 1px solid var(--jfl-border);
    border-radius: 8px;
    display: inline-flex;
    gap: 4px;
    padding: 4px;
}

.jfl-tabs button,
.jfl-btn,
.jfl-upload {
    align-items: center;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 7px;
    color: var(--jfl-text);
    cursor: pointer;
    display: inline-flex;
    font: inherit;
    font-size: 0.88rem;
    font-weight: 800;
    justify-content: center;
    min-height: 36px;
    padding: 8px 11px;
    text-decoration: none;
    transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, color 0.18s ease;
    white-space: nowrap;
}

.jfl-tabs button.is-active,
.jfl-btn.is-primary {
    background: linear-gradient(135deg, var(--jfl-accent), var(--jfl-accent-2));
    color: #ffffff;
}

.jfl-btn {
    background: var(--jfl-panel-2);
    border-color: var(--jfl-border);
}

.jfl-tabs button:hover,
.jfl-btn:hover,
.jfl-upload:hover,
.jfl-theme-toggle:hover {
    border-color: var(--jfl-accent);
    transform: translateY(-1px);
}

.jfl-field {
    align-items: center;
    display: inline-flex;
    gap: 8px;
}

.jfl-field span {
    color: var(--jfl-muted);
    font-size: 0.78rem;
    font-weight: 800;
}

.jfl-field select,
.jfl-field input {
    background: var(--jfl-panel-2);
    border: 1px solid var(--jfl-border);
    border-radius: 7px;
    color: var(--jfl-text);
    font: inherit;
    min-height: 36px;
    padding: 6px 9px;
}

.jfl-custom-separator input {
    max-width: 88px;
}

.jfl-check {
    align-items: center;
    color: var(--jfl-text);
    display: inline-flex;
    font-size: 0.88rem;
    font-weight: 700;
    gap: 7px;
    min-height: 36px;
}

.jfl-check input {
    accent-color: var(--jfl-accent);
    height: 17px;
    width: 17px;
}

.jfl-upload input,
#jfl-file {
    height: 1px;
    opacity: 0;
    overflow: hidden;
    position: absolute;
    width: 1px;
}

.jfl-status {
    background: var(--jfl-panel);
    border: 1px solid var(--jfl-border);
    border-radius: 8px;
    color: var(--jfl-muted);
    margin: 12px 0;
    padding: 11px 13px;
}

.jfl-status[data-state="success"] {
    border-color: rgba(20, 122, 74, 0.35);
    color: var(--jfl-success);
}

.jfl-status[data-state="error"] {
    border-color: rgba(195, 49, 38, 0.35);
    color: var(--jfl-danger);
}

.jfl-editor-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.jfl-panel {
    background: var(--jfl-panel);
    border: 1px solid var(--jfl-border);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    min-height: 620px;
    overflow: hidden;
}

.jfl-panel header {
    align-items: center;
    background: linear-gradient(135deg, rgba(36, 107, 254, 0.08), rgba(19, 168, 139, 0.07));
    border-bottom: 1px solid var(--jfl-border);
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 13px 14px;
}

.jfl-panel header p,
.jfl-panel header span {
    color: var(--jfl-muted);
    font-size: 0.78rem;
    font-weight: 800;
    margin: 0;
}

.jfl-panel h2 {
    color: var(--jfl-text);
    font-size: 1rem;
    line-height: 1.2;
    margin: 3px 0 0;
}

.jfl-editor-shell {
    display: grid;
    flex: 1;
    grid-template-columns: 52px minmax(0, 1fr);
    min-height: 540px;
    position: relative;
}

.jfl-lines {
    background: var(--jfl-panel-2);
    border: 0;
    border-right: 1px solid var(--jfl-border);
    color: var(--jfl-line);
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.85rem;
    line-height: 1.62;
    margin: 0;
    overflow: hidden;
    padding: 16px 10px;
    text-align: right;
    user-select: none;
}

.jfl-editor-shell textarea {
    background:
        linear-gradient(90deg, rgba(36, 107, 254, 0.04), transparent 18px),
        var(--jfl-panel);
    border: 0;
    color: var(--jfl-code);
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.93rem;
    line-height: 1.62;
    min-height: 540px;
    outline: 0;
    padding: 16px;
    resize: vertical;
    tab-size: 2;
    width: 100%;
}

.jfl-editor-shell textarea::placeholder {
    color: var(--jfl-muted);
}

.jfl-drop-message {
    align-items: center;
    background: rgba(36, 107, 254, 0.12);
    border: 1px dashed var(--jfl-accent);
    border-radius: 8px;
    color: var(--jfl-accent);
    display: none;
    font-weight: 800;
    inset: 16px;
    justify-content: center;
    pointer-events: none;
    position: absolute;
}

.jfl-editor-shell.is-dragging .jfl-drop-message {
    display: flex;
}

.jfl-stats {
    display: grid;
    gap: 10px;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    margin: 14px 0 0;
}

.jfl-stats div {
    background: linear-gradient(135deg, var(--jfl-panel), var(--jfl-panel-2));
    border: 1px solid var(--jfl-border);
    border-radius: 8px;
    padding: 13px;
}

.jfl-stats dt {
    color: var(--jfl-muted);
    font-size: 0.76rem;
    font-weight: 800;
    margin: 0 0 6px;
}

.jfl-stats dd {
    color: var(--jfl-text);
    font-size: 1.35rem;
    font-weight: 850;
    line-height: 1;
    margin: 0;
}

.jfl-content,
.jfl-faq,
.jfl-related {
    margin-top: 30px;
}

.jfl-content-head {
    max-width: 820px;
}

.jfl-content h2,
.jfl-faq h2,
.jfl-related h2 {
    color: var(--jfl-text);
    font-size: clamp(1.45rem, 3vw, 2.3rem);
    letter-spacing: 0;
    line-height: 1.12;
    margin: 0 0 10px;
}

.jfl-content p,
.jfl-faq p,
.jfl-related p {
    color: var(--jfl-muted);
    line-height: 1.7;
}

.jfl-card-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 18px;
}

.jfl-card-grid article {
    background: linear-gradient(145deg, var(--jfl-panel), var(--jfl-panel-2));
    border: 1px solid var(--jfl-border);
    border-radius: 8px;
    box-shadow: 0 12px 36px rgba(15, 23, 42, 0.06);
    padding: 18px;
}

.jfl-card-grid h3 {
    color: var(--jfl-text);
    font-size: 1rem;
    margin: 0 0 8px;
}

.jfl-card-grid p {
    font-size: 0.94rem;
    margin: 0;
}

.jfl-faq {
    display: grid;
    gap: 10px;
}

.jfl-faq details {
    background: var(--jfl-panel);
    border: 1px solid var(--jfl-border);
    border-radius: 8px;
    padding: 15px 16px;
}

.jfl-faq summary {
    color: var(--jfl-text);
    cursor: pointer;
    font-weight: 850;
}

.jfl-faq details p {
    margin: 10px 0 0;
}

.jfl-related nav {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: 12px;
}

.jfl-related a {
    background: var(--jfl-panel);
    border: 1px solid var(--jfl-border);
    border-radius: 999px;
    color: var(--jfl-text);
    font-size: 0.9rem;
    font-weight: 800;
    padding: 9px 12px;
    text-decoration: none;
}

.jfl-related a:hover {
    border-color: var(--jfl-accent);
    color: var(--jfl-accent);
}

.jfl-tool button:focus,
.jfl-tool input:focus,
.jfl-tool select:focus,
.jfl-tool textarea:focus,
.jfl-tool a:focus,
.jfl-upload:focus-within {
    outline: 2px solid var(--jfl-accent);
    outline-offset: 2px;
}

@media (max-width: 1180px) {
    .jfl-page-grid {
        grid-template-columns: 1fr;
    }

    .jfl-side-ad {
        display: none;
    }

    .jfl-card-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .jfl-stats {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    .jfl-tool {
        padding: 20px 12px;
    }

    .jfl-hero {
        align-items: center;
    }

    .jfl-editor-grid {
        grid-template-columns: 1fr;
    }

    .jfl-panel,
    .jfl-editor-shell,
    .jfl-editor-shell textarea {
        min-height: 420px;
    }

    .jfl-toolbar {
        position: static;
    }
}

@media (max-width: 640px) {
    .jfl-hero {
        flex-direction: column;
    }

    .jfl-hero h1 {
        font-size: 2.2rem;
    }

    .jfl-app {
        padding: 10px;
    }

    .jfl-toolbar,
    .jfl-field {
        align-items: stretch;
        flex-direction: column;
    }

    .jfl-tabs,
    .jfl-btn,
    .jfl-upload,
    .jfl-field select,
    .jfl-field input {
        width: 100%;
    }

    .jfl-tabs button {
        flex: 1;
    }

    .jfl-stats,
    .jfl-card-grid {
        grid-template-columns: 1fr;
    }

    .jfl-editor-shell {
        grid-template-columns: 42px minmax(0, 1fr);
    }

    .jfl-lines {
        font-size: 0.78rem;
        padding-left: 6px;
        padding-right: 7px;
    }

    .jfl-editor-shell textarea {
        font-size: 16px;
        min-height: 360px;
        padding: 14px 12px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .jfl-tool *,
    .jfl-tool *::before,
    .jfl-tool *::after {
        scroll-behavior: auto !important;
        transition: none !important;
    }
}