:root {
    color-scheme: light;
    --bg: #f5f8fc;
    --surface: #ffffff;
    --surface-soft: #f8faff;
    --text: #101828;
    --muted: #5f6f89;
    --line: #dce4ef;
    --primary: #2563eb;
    --primary-soft: #edf4ff;
    --success: #16803c;
    --danger: #b42318;
    --radius: 16px;
    --shadow:
        0 14px 40px
        rgba(15, 23, 42, .07);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background:
        radial-gradient(
            circle at 90% 0%,
            #e6f4ff 0,
            transparent 27rem
        ),
        var(--bg);
    color: var(--text);
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
}

button,
input,
select {
    font: inherit;
}

button {
    cursor: pointer;
}

.wrap {
    width: min(
        calc(100% - 32px),
        1120px
    );
    margin-inline: auto;
}

.hero {
    padding: 60px 0 28px;
}

.brand {
    margin-bottom: 28px;
    font-size: 1rem;
    font-weight: 900;
    letter-spacing: -.02em;
}

.eyebrow,
.section-heading > span,
.preview-heading > span {
    display: inline-block;
    color: var(--primary);
    font-size: .7rem;
    font-weight: 900;
    letter-spacing: .09em;
}

.hero h1 {
    max-width: 800px;
    margin: 10px 0 12px;
    font-size:
        clamp(
            2.5rem,
            6vw,
            4.8rem
        );
    line-height: .98;
    letter-spacing: -.055em;
}

.hero h1 span {
    color: var(--primary);
}

.hero p {
    max-width: 740px;
    margin: 0;
    color: var(--muted);
    font-size: 1.08rem;
    line-height: 1.65;
}

.privacy {
    width: fit-content;
    margin-top: 16px;
    padding: 8px 11px;
    border: 1px solid #bbf7d0;
    border-radius: 10px;
    background: #f0fdf4;
    color: #166534;
    font-size: .8rem;
    font-weight: 700;
}

.tool-section {
    padding: 8px 0 42px;
}

.mode-tabs {
    display: inline-grid;
    grid-template-columns: 1fr 1fr;
    gap: 5px;
    padding: 5px;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.mode-tabs button {
    min-width: 140px;
    min-height: 42px;
    padding: 8px 18px;
    border: 0;
    border-radius: 9px;
    background: transparent;
    color: var(--muted);
    font-weight: 850;
}

.mode-tabs button.active {
    background: var(--primary);
    color: #fff;
}

.workspace {
    display: grid;
    grid-template-columns:
        minmax(0, .9fr)
        minmax(0, 1.1fr);
    gap: 18px;
    align-items: start;
    margin-top: 16px;
}

.editor,
.preview {
    min-width: 0;
    padding: 21px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.preview {
    position: sticky;
    top: 18px;
}

.section-heading,
.preview-heading {
    margin-bottom: 16px;
}

.section-heading h2,
.preview-heading h2 {
    margin: 4px 0 0;
    font-size: 1.3rem;
}

.editor label {
    display: grid;
    gap: 6px;
    margin-bottom: 13px;
}

.editor label > span {
    font-size: .82rem;
    font-weight: 800;
}

.editor input,
.editor select,
.dynamic-fields textarea {
    width: 100%;
    min-height: 44px;
    padding: 9px 11px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text);
}

.dynamic-fields textarea {
    min-height: 90px;
    resize: vertical;
}

.dynamic-fields {
    display: grid;
    gap: 0;
}

.field-help {
    margin: -5px 0 14px;
    color: var(--muted);
    font-size: .77rem;
    line-height: 1.5;
}

.quick-customize {
    margin-top: 16px;
    border-top: 1px solid var(--line);
    padding-top: 14px;
}

.quick-customize summary {
    margin-bottom: 14px;
    font-weight: 900;
    cursor: pointer;
}

.customize-grid {
    display: grid;
    grid-template-columns:
        repeat(
            2,
            minmax(0, 1fr)
        );
    gap: 10px;
}

.editor input[type="color"] {
    min-height: 46px;
    padding: 4px;
}

.frame-section {
    margin-top: 8px;
    padding-top: 12px;
    border-top: 1px solid var(--line);
}

.frame-section > strong {
    display: block;
    margin-bottom: 9px;
    font-size: .84rem;
}

.frame-options {
    display: grid;
    grid-template-columns:
        repeat(
            3,
            minmax(0, 1fr)
        );
    gap: 7px;
    margin-bottom: 11px;
}

.frame-options button {
    min-height: 39px;
    border: 1px solid var(--line);
    border-radius: 9px;
    background: var(--surface);
    color: var(--text);
    font-size: .78rem;
    font-weight: 800;
}

.frame-options button.active {
    border-color: var(--primary);
    background: var(--primary-soft);
    color: var(--primary);
}

.check-row {
    display: flex !important;
    align-items: center;
    grid-template-columns: none;
    gap: 8px !important;
}

.check-row input {
    width: 17px;
    min-height: auto;
    height: 17px;
}

.code-stage {
    display: grid;
    place-items: center;
    min-height: 470px;
    overflow: auto;
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background:
        linear-gradient(
            135deg,
            #f8fafc,
            #ffffff
        );
}

.qr-composition {
    display: grid;
    justify-items: center;
    min-width: 320px;
    padding: 20px;
    border-radius: 18px;
    background: #fff;
}

.qr-render {
    display: grid;
    place-items: center;
}

.qr-render canvas,
.qr-render svg {
    display: block;
}

.frame-top,
.frame-bottom {
    display: none;
    width: 100%;
    text-align: center;
}

.qr-composition:not(
    .frame-none
)
.frame-top,
.qr-composition:not(
    .frame-none
)
.frame-bottom {
    display: block;
}

.frame-label {
    border: 4px solid
        var(--frame-color);
}

.frame-label .frame-top {
    margin-bottom: 12px;
    color: var(--frame-color);
    font-size: .82rem;
    font-weight: 900;
    letter-spacing: .1em;
}

.frame-footer {
    padding-bottom: 0;
    border: 4px solid
        var(--frame-color);
    overflow: hidden;
}

.frame-footer .frame-bottom {
    margin-top: 16px;
    padding: 13px 15px;
    background: var(--frame-color);
    color: #fff;
    font-size: .82rem;
    font-weight: 900;
    letter-spacing: .08em;
}

.frame-card {
    padding: 26px;
    border: 2px solid
        var(--frame-color);
    border-radius: 24px;
    box-shadow:
        0 12px 30px
        rgba(15, 23, 42, .11);
}

.frame-card .frame-top {
    margin-bottom: 13px;
    color: var(--frame-color);
    font-size: .85rem;
    font-weight: 900;
}

.frame-ticket {
    padding: 24px 30px;
    border: 3px dashed
        var(--frame-color);
    border-radius: 14px;
}

.frame-ticket .frame-bottom {
    margin-top: 12px;
    color: var(--frame-color);
    font-size: .8rem;
    font-weight: 900;
}

.frame-poster {
    padding: 28px;
    border-radius: 0;
    background:
        linear-gradient(
            180deg,
            var(--frame-color) 0 60px,
            #fff 60px
        );
    border: 2px solid
        var(--frame-color);
}

.frame-poster .frame-top {
    margin-bottom: 24px;
    color: #fff;
    font-size: .85rem;
    font-weight: 900;
}

.code-stage > svg {
    display: block;
    max-width: 100%;
    height: auto;
    padding: 18px;
    background: #fff;
}

.status {
    margin-top: 12px;
    padding: 10px 12px;
    border-radius: 9px;
    font-size: .8rem;
}

.status[data-level="good"] {
    border: 1px solid #bbf7d0;
    background: #f0fdf4;
    color: var(--success);
}

.status[data-level="bad"] {
    border: 1px solid #fecaca;
    background: #fef2f2;
    color: var(--danger);
}

.download-actions {
    display: grid;
    grid-template-columns:
        1fr 1fr;
    gap: 9px;
    margin-top: 12px;
}

.download-actions button {
    min-height: 44px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text);
    font-weight: 850;
}

.download-actions .primary {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
}

.content-section {
    padding: 0 16px 70px;
}

.content-wrap {
    width: min(
        100%,
        900px
    );
    margin: 0 auto;
    padding: clamp(
        22px,
        4vw,
        38px
    );
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.content-wrap h2 {
    margin: 28px 0 8px;
    font-size: 1.45rem;
}

.content-wrap h2:first-child {
    margin-top: 0;
}

.content-wrap > p {
    margin: 0;
    color: var(--muted);
    line-height: 1.72;
}

.faq {
    display: grid;
    gap: 8px;
    margin-top: 12px;
}

.faq details {
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--surface-soft);
}

.faq summary {
    padding: 12px 13px;
    font-weight: 800;
    cursor: pointer;
}

.faq p {
    margin: 0;
    padding: 0 13px 13px;
    color: var(--muted);
    line-height: 1.6;
}

footer {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    width: min(
        calc(100% - 32px),
        1120px
    );
    margin: 0 auto;
    padding: 25px 0 40px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: .8rem;
}

[hidden] {
    display: none !important;
}

@media (max-width: 820px) {
    .workspace {
        grid-template-columns: 1fr;
    }

    .preview {
        position: static;
    }
}

@media (max-width: 560px) {
    .hero {
        padding-top: 36px;
    }

    .mode-tabs {
        display: grid;
        width: 100%;
    }

    .mode-tabs button {
        min-width: 0;
    }

    .editor,
    .preview {
        padding: 15px;
    }

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

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

    .code-stage {
        min-height: 360px;
        padding: 12px;
    }

    .qr-composition {
        min-width: 0;
        width: 100%;
    }

    footer {
        flex-direction: column;
    }
}