:root {
    --race-navy: #0f172a;
    --race-blue: #00aeef;
    --race-blue-dark: #087fae;
    --race-soft: #f7fafc;
    --race-border: #e3ebf3;
    --race-muted: #64788a;
    --race-danger: #c2414b;
    --race-success: #148768;
}

.tool-shell {
    width: 100%;
    min-width: 0;
    max-width: 1180px;
    box-sizing: border-box;
    margin: 0 auto;
    padding: 0 20px;
}

.race-hero {
    padding: 18px 0 8px;
}

.race-hero .hero-inner {
    align-items: center;
}

.race-hero .hero-content {
    max-width: 920px;
}

.tool-section {
    overflow-x: hidden;
    padding-top: 24px;
}

.ad-area {
    min-width: 0;
    overflow-x: hidden;
}

.tool-shell.demo-mode .step-nav,
.tool-shell.demo-mode .step-panel,
.tool-shell.demo-mode > .global-message {
    display: none;
}

.tool-shell:not(.demo-mode) .demo-view {
    display: none;
}

.demo-view {
    overflow: hidden;
    border: 1px solid var(--race-border);
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 20px 52px rgba(15, 23, 42, .09);
}

.demo-chart-card {
    margin: 0 24px;
    overflow: hidden;
    border: 1px solid var(--race-border);
    border-radius: 12px;
    background: #f2f6f8;
}

.demo-chart-stage {
    width: min(100%, 940px);
    margin: 0 auto;
    padding: 14px;
    box-sizing: border-box;
}

.demo-chart-stage svg {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    display: block;
    background: #fff;
    box-shadow: 0 10px 28px rgba(15, 23, 42, .1);
}

.demo-playback {
    display: grid;
    grid-template-columns: 39px 48px minmax(70px, auto) minmax(120px, 1fr) 44px;
    align-items: center;
    gap: 9px;
    padding: 12px 18px;
    border-top: 1px solid var(--race-border);
    background: #fff;
    color: #496578;
    font-size: .83rem;
}

.demo-playback .play-btn {
    margin-top: 0;
}

.demo-playback input {
    width: 100%;
    accent-color: var(--race-blue);
}

.demo-data-note {
    margin: 14px 24px 0;
    padding: 15px 17px;
    border: 1px solid #dce9f0;
    border-radius: 11px;
    background: #f8fbfd;
    color: #496578;
    font-size: .8rem;
    line-height: 1.65;
}

.demo-data-note p {
    margin: 0;
}

.demo-data-title {
    margin: 0;
    color: #274b61;
    font-size: 1rem;
}

.demo-question-note {
    color: #274b61;
    font-weight: 700;
}

.demo-source-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 10px;
}

.demo-source-row a:not(.mini-btn),
.demo-data-note details a {
    color: #087fae;
    text-underline-offset: 2px;
}

.demo-source-row .mini-btn {
    flex: 0 0 auto;
}

.demo-data-details {
    margin-top: 7px;
    border-top: 1px solid #dce9f0;
}

.demo-data-details > summary {
    padding: 10px 0 0;
    cursor: pointer;
    color: #2d6079;
    font-weight: 700;
}

.demo-data-details-content {
    padding-top: 10px;
}

.demo-data-details-content > details {
    margin-top: 10px;
    border-top: 1px solid #dce9f0;
}

.demo-data-details-content > details > summary {
    padding: 10px 0 0;
    cursor: pointer;
    color: #2d6079;
    font-weight: 700;
}

.demo-data-details-content > details p {
    padding-top: 7px;
}

.demo-actions {
    padding: 22px 24px 20px;
    text-align: center;
}

.demo-actions h2 {
    margin: 0 0 7px;
    color: var(--text-main);
    font-size: 1.3rem;
}

.demo-actions > p {
    margin: 0;
    color: var(--race-muted);
    line-height: 1.7;
}

.demo-action-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 12px;
    max-width: 760px;
    margin: 17px auto 0;
}

.btn-large {
    min-height: 54px;
    justify-content: center;
    font-size: .96rem;
}

.sample-switch {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 17px;
    color: var(--race-muted);
    font-size: .85rem;
}

.sample-switch .mini-btn.active {
    border-color: var(--race-blue);
    background: #eaf9ff;
    color: #087fae;
    box-shadow: 0 0 0 2px rgba(0, 174, 239, .1);
}

.demo-actions .demo-privacy {
    margin-top: 14px;
    color: #367084;
    font-size: .8rem;
}

.demo-error {
    display: none;
    margin: 0 24px 20px;
    padding: 12px 14px;
    border-radius: 8px;
    background: #fff4f5;
    color: #963841;
}

.demo-error.active {
    display: block;
}

.step-nav {
    display: grid;
    grid-template-columns: repeat(4, minmax(105px, 1fr) 18px) minmax(105px, 1fr);
    align-items: center;
    margin-bottom: 24px;
}

.step-nav > i {
    color: #b4c1cc;
    text-align: center;
    font-size: .72rem;
}

.step-item {
    min-height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    appearance: none;
    border: 1px solid var(--race-border);
    background: #fff;
    color: var(--race-muted);
    border-radius: 10px;
    font: inherit;
    cursor: pointer;
    transition: .2s;
}

.step-item span {
    width: 27px;
    height: 27px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: #edf3f7;
    font-weight: 700;
}

.step-item b { font-size: .87rem; }
.step-item:disabled { cursor: not-allowed; opacity: .58; }
.step-item.active { border-color: var(--race-blue); color: #087fae; box-shadow: 0 7px 18px rgba(0, 174, 239, .12); }
.step-item.active span { background: var(--race-blue); color: #fff; }
.step-item.completed span { background: #dff6ee; color: var(--race-success); }
.step-item:focus-visible, .btn:focus-visible, .mini-btn:focus-visible, .palette-template:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible { outline: 3px solid rgba(0, 174, 239, .3); outline-offset: 2px; }

.global-message {
    display: none;
    white-space: pre-line;
    margin-bottom: 18px;
    padding: 14px 17px;
    border-radius: 9px;
    border: 1px solid #f3bdc1;
    background: #fff4f5;
    color: #963841;
    line-height: 1.65;
}

.global-message.active { display: block; }
.global-message.success { border-color: #a8decf; background: #effbf7; color: #176c55; }

.time-duplicate-warning {
    margin: -7px 0 18px;
    padding: 13px 16px;
    border: 1px solid #efb6ba;
    border-radius: 9px;
    background: #fff5f5;
    color: #963841;
    font-size: .88rem;
    font-weight: 700;
    line-height: 1.7;
}

.step-panel { display: none; scroll-margin-top: 170px; }
.step-panel.active { display: block; }

.step-panel,
.workspace-panel,
.settings-panel,
.config-preview-layout,
.preview-layout {
    min-width: 0;
}

.workspace-panel,
.settings-panel {
    background: #fff;
    border: 1px solid var(--race-border);
    border-radius: 12px;
    box-shadow: 0 16px 40px rgba(15, 23, 42, .06);
}

.workspace-panel + .workspace-panel { margin-top: 22px; }
.padded-panel { box-sizing: border-box; padding: 24px; }
.upload-panel { overflow: hidden; }

.drop-zone {
    width: min(100%, 400px);
    min-height: 390px;
    margin: 0 auto;
    display: grid;
    place-items: center;
    padding: 36px 24px;
    box-sizing: border-box;
    background: linear-gradient(145deg, rgba(247, 252, 255, .98), rgba(255, 255, 255, .98)), repeating-linear-gradient(45deg, rgba(0, 174, 239, .06) 0 10px, transparent 10px 20px);
    border: 2px dashed rgba(0, 174, 239, .36);
    cursor: default;
    transition: .2s;
}

.drop-zone.dragover {
    border-color: var(--race-blue);
    background: #edfaff;
    transform: scale(.995);
}

.drop-inner { text-align: center; max-width: 520px; }
.drop-icon { width: 74px; height: 74px; margin: 0 auto 18px; border-radius: 50%; display: grid; place-items: center; background: var(--race-navy); color: #fff; font-size: 2rem; }
.drop-inner h2 { margin: 0 0 10px; font-size: 1.45rem; color: var(--text-main); }
.drop-inner p { margin: 0 0 18px; color: var(--race-muted); line-height: 1.7; }
.input-actions { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
.privacy-note { margin-top: 17px; color: #367084; font-size: .87rem; display: inline-flex; align-items: center; gap: 7px; }

.sample-row {
    padding: 50px 18px 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.mini-btn.sample-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 22px;
    font-size: 1rem;
}

.mini-btn {
    border: 1px solid #d8e4ec;
    background: #fff;
    color: #2c6983;
    border-radius: 8px;
    padding: 8px 11px;
    font: 700 .82rem/1.25 "M PLUS Rounded 1c", sans-serif;
    cursor: pointer;
    text-decoration: none;
}

.mini-btn:hover { border-color: var(--race-blue); background: #f1fbff; }
.mini-btn.danger { color: var(--race-danger); }

.source-panel { margin-top: 22px; padding: 22px; }
.panel-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 18px; margin-bottom: 18px; }
.panel-head p { margin: 6px 0 0; color: var(--race-muted); line-height: 1.6; }
.panel-title { margin: 0; font-size: 1.08rem; color: var(--text-main); display: flex; align-items: center; gap: 9px; }
.panel-title i { color: var(--race-blue-dark); }

.parse-settings,
.settings-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 15px;
}

.parse-settings { grid-template-columns: repeat(4, minmax(0, 1fr)); padding: 15px; margin-bottom: 15px; border-radius: 10px; background: var(--race-soft); }
.parse-settings label, .settings-grid label, .mapping-row label { display: grid; gap: 7px; color: #3e586b; font-weight: 700; font-size: .86rem; }
.form-select, .form-input { width: 100%; min-height: 42px; box-sizing: border-box; border: 1px solid #d7e2ea; border-radius: 8px; background: #fff; color: #244258; padding: 9px 11px; font: 500 .9rem/1.4 "M PLUS Rounded 1c", sans-serif; }
.color-input { width: 100%; height: 42px; box-sizing: border-box; border: 1px solid #d7e2ea; border-radius: 8px; background: #fff; padding: 4px; cursor: pointer; }

.data-table-wrap {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    max-height: 460px;
    overflow: auto;
    box-sizing: border-box;
    overscroll-behavior-x: contain;
    border: 1px solid var(--race-border);
    border-radius: 9px;
}
.data-table { width: 100%; min-width: 720px; border-collapse: separate; border-spacing: 0; color: #334f63; font-size: .82rem; }
.data-table th { position: sticky; top: 0; z-index: 2; padding: 10px 12px; background: #edf6fa; color: #28536a; text-align: left; white-space: nowrap; border-bottom: 1px solid #d9e5ec; }
.data-table td { padding: 9px 12px; border-bottom: 1px solid #edf1f4; white-space: nowrap; }
.data-table tr:nth-child(even) td { background: #fbfdfe; }
.data-table .cell-warning { color: #a84d2b; font-weight: 700; }
.summary-table { width: max-content; min-width: 100%; }
.editable-table { min-width: 50px; }
.summary-table th { position: static; }
.summary-table thead th:not(:first-child), .summary-table td { text-align: right; }
.summary-table tbody th {
    padding: 9px 12px;
    border-bottom: 1px solid #edf1f4;
    background: #fff;
    color: #334f63;
    text-align: left;
    white-space: nowrap;
}
.summary-table tbody tr:nth-child(even) th { background: #fbfdfe; }
.editable-table th,
.editable-table td { width: 100px; max-width: 100px; box-sizing: border-box; }
.editable-table tr > :first-child { width: 150px; max-width: 150px; }
.editable-table td { padding: 5px 7px; }
.editable-table input {
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
    padding: 7px 9px;
    border: 1px solid #d3e0e8;
    border-radius: 6px;
    background: #fff;
    color: #244258;
    text-align: right;
    font: inherit;
}
.editable-table input:hover { border-color: #9bcfe1; }
.editable-table input:focus { border-color: var(--race-blue); box-shadow: 0 0 0 3px rgba(0, 174, 239, .13); outline: none; }
.editable-table input:invalid { border-color: var(--race-danger); background: #fff7f7; }
.editable-table .table-label-input { text-align: left; }
.editable-table input[type="number"] { appearance: textfield; -moz-appearance: textfield; }
.editable-table input[type="number"]::-webkit-inner-spin-button,
.editable-table input[type="number"]::-webkit-outer-spin-button { appearance: none; margin: 0; }

.panel-actions { display: flex; justify-content: flex-end; margin-top: 20px; }
.split-actions { justify-content: space-between; }

.confidence { padding: 7px 11px; border-radius: 999px; background: #edf9fd; color: #087fae; font-size: .8rem; font-weight: 700; white-space: nowrap; }
.format-switch { display: flex; gap: 20px; align-items: center; margin: 0 0 18px; padding: 14px 16px; border: 1px solid var(--race-border); border-radius: 9px; }
.format-switch legend { padding: 0 8px; color: #3a596d; font-size: .86rem; font-weight: 700; }
.format-switch label { display: flex; align-items: center; gap: 7px; color: #39586c; font-weight: 700; }
.mapping-grid { display: grid; gap: 10px; }
.mapping-row { display: grid; grid-template-columns: 190px minmax(0, 1fr); align-items: center; gap: 18px; padding: 12px 15px; background: var(--race-soft); border-radius: 9px; }
.mapping-label { color: #24475d; font-weight: 700; }
.mapping-label small { display: block; color: var(--race-muted); font-weight: 400; margin-top: 3px; }
.required-mark { display: inline-block; margin-left: 5px; padding: 2px 6px; border-radius: 4px; color: #fff; background: #df6871; font-size: .67rem; vertical-align: middle; }
.time-columns-head { display: flex; justify-content: space-between; align-items: center; gap: 15px; margin-top: 20px; }
.time-columns-head h3 { margin: 0; font-size: 1rem; color: #315167; }
.time-columns { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin-top: 10px; max-height: 260px; overflow: auto; padding: 12px; border: 1px solid var(--race-border); border-radius: 9px; }
.time-columns label { display: flex; align-items: center; gap: 7px; padding: 8px; border-radius: 6px; background: var(--race-soft); color: #3b5c70; font-size: .84rem; }

.detail-settings, .icon-settings { margin-top: 20px; border: 1px solid var(--race-border); border-radius: 9px; background: #fff; }
.detail-settings summary, .icon-settings summary { cursor: pointer; padding: 14px 16px; color: #2d536a; font-weight: 700; }
.compact-grid { padding: 0 16px 16px; grid-template-columns: repeat(4, minmax(0, 1fr)); }

.stats-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin-bottom: 18px; }
.stat-card { padding: 13px; border: 1px solid var(--race-border); border-radius: 9px; background: var(--race-soft); }
.stat-card span { display: block; color: var(--race-muted); font-size: .76rem; }
.stat-card strong { display: block; margin-top: 4px; color: #173b52; font-size: 1.12rem; }
.notice-list { display: grid; gap: 7px; margin-bottom: 15px; }
.notice { padding: 10px 12px; border-radius: 8px; background: #fff7ed; color: #965025; font-size: .84rem; }
.notice.ok { background: #effbf7; color: #176c55; }
.config-preview-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 24px; align-items: start; }
.settings-grid .wide-field { grid-column: 1 / -1; }
.settings-section { grid-column: 1 / -1; overflow: hidden; border: 1px solid var(--race-border); border-radius: 10px; background: #fff; }
.settings-section h3 { margin: 0; padding: 13px 15px; border-bottom: 1px solid var(--race-border); background: #edf4f8; color: #2d536a; font-size: .95rem; }
.settings-section-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 15px; }
.check-field { display: flex !important; align-items: center; gap: 8px !important; min-height: 42px; padding: 0 11px; border: 1px solid var(--race-border); border-radius: 8px; }
.check-field input { margin: 0; accent-color: var(--race-blue); }
.range-field > span { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.range-field output { min-width: 2.25em; padding: 2px 7px; border-radius: 999px; background: #eaf7fc; color: #167fa7; text-align: center; font-size: .78rem; }
.range-field input[type="range"] { width: 100%; min-height: 24px; margin: 2px 0 0; accent-color: var(--race-blue); cursor: pointer; }
.mini-preview-panel { position: sticky; top: 84px; padding: 20px; }
.settings-preview { margin-top: 16px; aspect-ratio: 16 / 9; overflow: hidden; border-radius: 8px; border: 1px solid var(--race-border); background: #fff; }
.settings-preview svg { width: 100%; height: 100%; display: block; }

.color-base-settings {
    margin-bottom: 20px;
}

.color-palette-section {
    overflow: hidden;
    border: 1px solid var(--race-border);
    border-radius: 10px;
    background: #fff;
}

.color-section-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    padding: 16px;
    border-bottom: 1px solid var(--race-border);
    background: #edf4f8;
}

.color-section-head h3,
.custom-palette h3 {
    margin: 0;
    color: #2d536a;
    font-size: .95rem;
}

.color-section-head p {
    margin: 5px 0 0;
    color: var(--race-muted);
    font-size: .82rem;
    line-height: 1.6;
}

.palette-status {
    flex: 0 0 auto;
    padding: 5px 9px;
    border-radius: 999px;
    background: #dff6ee;
    color: #176c55;
    font-size: .76rem;
    font-weight: 700;
}

.palette-template-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    padding: 16px;
}

.palette-template {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 122px;
    align-items: center;
    gap: 5px 12px;
    padding: 12px;
    border: 1px solid #d7e2ea;
    border-radius: 9px;
    background: #fff;
    color: #315167;
    font: inherit;
    text-align: left;
    cursor: pointer;
    transition: border-color .2s, box-shadow .2s, background-color .2s;
}

.palette-template:hover {
    border-color: #82c8df;
    background: #f8fcfe;
}

.palette-template.active {
    border-color: var(--race-blue);
    background: #f3fbfe;
    box-shadow: 0 0 0 2px rgba(0, 174, 239, .12);
}

.palette-template-title {
    color: #24475d;
    font-size: .88rem;
    font-weight: 700;
}

.palette-template small {
    grid-column: 1 / -1;
    color: var(--race-muted);
    font-size: .73rem;
    line-height: 1.45;
}

.palette-strip {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    overflow: hidden;
    min-height: 25px;
    border: 1px solid rgba(15, 23, 42, .08);
    border-radius: 6px;
}

.palette-strip i {
    display: block;
    background: var(--swatch);
}

.dark-strip {
    border-color: #26364d;
    background: #111827;
    padding: 3px;
    gap: 2px;
}

.custom-palette {
    padding: 16px;
    border-top: 1px solid var(--race-border);
}

.palette-editor {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 9px;
    margin-top: 12px;
}

.palette-color-field {
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr);
    align-items: center;
    gap: 7px;
    min-width: 0;
    padding: 6px;
    border: 1px solid #dce6ec;
    border-radius: 8px;
    color: #496578;
    font-size: .75rem;
    font-weight: 700;
}

.palette-color-field input {
    width: 34px;
    height: 30px;
    box-sizing: border-box;
    padding: 2px;
    border: 1px solid #c7d7e0;
    border-radius: 6px;
    background: #fff;
    cursor: pointer;
}

.palette-color-field span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.item-color-settings {
    margin-top: 16px;
}

.item-color-note {
    margin: -2px 16px 12px;
    color: var(--race-muted);
    font-size: .8rem;
    line-height: 1.6;
}

.item-color-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    max-height: 360px;
    overflow: auto;
    padding: 0 16px 16px;
}

.item-color-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 42px;
    align-items: center;
    gap: 10px;
    min-width: 0;
    padding: 8px 10px;
    border-radius: 8px;
    background: var(--race-soft);
}

.item-color-row span {
    overflow: hidden;
    color: #35556a;
    font-size: .83rem;
    font-weight: 700;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.item-color-row input {
    width: 42px;
    height: 32px;
    box-sizing: border-box;
    padding: 2px;
    border: 1px solid #c7d7e0;
    border-radius: 6px;
    background: #fff;
    cursor: pointer;
}

.icon-toolbar { display: grid; grid-template-columns: minmax(0, 1fr) 150px auto auto; gap: 8px; padding: 0 16px 10px; }
.icon-count { margin: 0; padding: 0 16px 10px; color: var(--race-muted); font-size: .82rem; }
.icon-list { max-height: 360px; overflow: auto; display: grid; gap: 7px; padding: 0 16px 16px; }
.icon-row { display: grid; grid-template-columns: 42px minmax(0, 1fr) auto; align-items: center; gap: 10px; padding: 8px; border-radius: 8px; background: var(--race-soft); }
.icon-thumb { width: 42px; height: 42px; display: grid; place-items: center; overflow: hidden; border: 1px solid #dbe5eb; border-radius: 7px; background: transparent; color: #9aaab5; }
.icon-thumb img { width: 100%; height: 100%; object-fit: contain; }
.icon-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: #35556a; font-size: .85rem; font-weight: 700; }
.icon-actions { display: flex; align-items: center; gap: 6px; }
.icon-color-input { width: 34px; height: 30px; padding: 2px; border: 1px solid #c7d7e0; border-radius: 6px; background: #fff; cursor: pointer; }

.preview-layout { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 24px; align-items: start; }
.chart-panel { overflow: hidden; }
.chart-stage {
    display: grid;
    place-items: center;
    min-height: 0;
    padding: 12px;
    box-sizing: border-box;
    background: #f2f6f8;
}
.chart-stage svg {
    width: min(100%, 128vh, 1458px);
    height: auto;
    max-height: none;
    display: block;
    background: #fff;
    box-shadow: 0 12px 30px rgba(15, 23, 42, .11);
}
.chart-stage[data-aspect="9:16"] svg { width: min(100%, 40.5vh, 461px); }
.chart-stage[data-aspect="1:1"] svg { width: min(100%, 72vh, 820px); }
.chart-stage[data-aspect="4:5"] svg { width: min(100%, 57.6vh, 656px); }
.chart-stage:fullscreen {
    min-height: 100vh;
    padding: 18px;
}
.chart-stage:fullscreen svg {
    width: min(calc(100vw - 36px), 170.6vh);
    box-shadow: none;
}
.chart-stage:fullscreen[data-aspect="9:16"] svg { width: min(calc(100vw - 36px), 54vh); }
.chart-stage:fullscreen[data-aspect="1:1"] svg { width: min(calc(100vw - 36px), 96vh); }
.chart-stage:fullscreen[data-aspect="4:5"] svg { width: min(calc(100vw - 36px), 76.8vh); }
.playback-panel { padding: 14px 18px 18px; border-top: 1px solid var(--race-border); }
.playback-controls { display: flex; justify-content: center; gap: 7px; }
.seek-btn, .play-btn { width: 39px; height: 39px; display: grid; place-items: center; border: 1px solid #d7e3eb; border-radius: 50%; background: #fff; color: #2d6079; cursor: pointer; }
.play-btn { width: 48px; height: 48px; margin-top: -5px; background: var(--race-navy); color: #fff; border-color: var(--race-navy); }
.seek-row { display: grid; grid-template-columns: minmax(90px, auto) minmax(0, 1fr) 44px; align-items: center; gap: 10px; margin-top: 12px; color: #496578; font-size: .83rem; }
.seek-row input { width: 100%; accent-color: var(--race-blue); }
.settings-panel { padding: 20px; position: sticky; top: 84px; }
.export-note { color: var(--race-muted); font-size: .84rem; line-height: 1.7; }
.full-btn { width: 100%; box-sizing: border-box; justify-content: center; margin-top: 9px; text-align: center; }
.export-panel hr { border: 0; border-top: 1px solid var(--race-border); margin: 18px 0 8px; }
.export-progress { margin-top: 12px; padding: 11px; border-radius: 8px; background: #eef8fc; color: #29647f; font-size: .82rem; }
.import-label { display: flex; cursor: pointer; }
.back-setting-btn { margin-top: 20px; }

.info-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.info-card { padding: 24px; background: #fff; border: 1px solid var(--race-border); border-radius: 11px; }
.info-card > i { color: var(--race-blue-dark); font-size: 1.45rem; }
.info-card h3 { margin: 12px 0 7px; color: #274b61; }
.info-card p { margin: 0; color: var(--race-muted); line-height: 1.75; }
.content-container { max-width: 980px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step { position: relative; padding: 24px; border: 1px solid var(--race-border); border-radius: 11px; }
.step-num { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--race-blue); color: #fff; font-weight: 700; }
.step h3 { margin: 13px 0 7px; color: #274b61; }
.step p { margin: 0; color: var(--race-muted); line-height: 1.75; }
.seo-guide-section .section-header > p { max-width: 780px; margin: 14px auto 0; color: var(--race-muted); line-height: 1.9; }
.seo-guide-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; margin-top: 34px; }
.seo-guide-grid article { padding-top: 18px; border-top: 3px solid #b9e9f7; }
.seo-guide-grid h3 { margin: 0 0 10px; color: #274b61; font-size: 1.04rem; line-height: 1.65; }
.seo-guide-grid h3 i { margin-right: 7px; color: var(--race-blue-dark); }
.seo-guide-grid p { margin: 0; color: var(--race-muted); line-height: 1.9; }
.faq-container { max-width: 860px; }
.faq-list details { border-bottom: 1px solid #dfe8ee; }
.faq-list summary { cursor: pointer; color: #2d455b; font-weight: 700; padding: 16px 0; }
.faq-list p { color: var(--race-muted); line-height: 1.8; margin: 0 0 16px; }

@media (max-width: 980px) {
    .config-preview-layout, .preview-layout { grid-template-columns: 1fr; }
    .mini-preview-panel, .settings-panel { position: static; }
    .parse-settings, .compact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .stats-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .palette-editor { grid-template-columns: repeat(5, minmax(92px, 1fr)); overflow-x: auto; }
}

@media (max-width: 760px) {
    .tool-shell { padding: 0 14px; }
    .race-hero .hero-title { font-size: 1.85rem; }
    .demo-chart-card { margin: 0 10px; }
    .demo-chart-stage { padding: 6px; }
    .demo-data-note { margin: 12px 10px 0; padding: 13px; }
    .demo-source-row { display: block; }
    .demo-source-row .mini-btn { display: inline-flex; margin-top: 10px; }
    .demo-playback { grid-template-columns: 39px 48px minmax(0, 1fr) 40px; padding: 10px; }
    .demo-playback > span:first-of-type { grid-column: 1 / -1; grid-row: 1; text-align: center; }
    .demo-playback .seek-btn { grid-column: 1; }
    .demo-playback .play-btn { grid-column: 2; }
    .demo-playback input { grid-column: 3; }
    .demo-actions { padding: 20px 16px 18px; }
    .demo-action-grid { grid-template-columns: 1fr; }
    .step-nav { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 5px; }
    .step-nav > i { display: none; }
    .step-item { flex: 0 0 auto; min-width: 52px; min-height: 44px; padding: 7px; }
    .step-item b { display: none; }
    .drop-zone { min-height: 340px; padding: 28px 16px; }
    .panel-head { display: block; }
    .panel-head > .mini-btn, .panel-head > .confidence { display: inline-block; margin-top: 12px; }
    .parse-settings, .settings-grid, .compact-grid, .settings-section-fields { grid-template-columns: 1fr; }
    .palette-template-grid, .item-color-list { grid-template-columns: 1fr; }
    .color-section-head { display: block; }
    .palette-status { display: inline-block; margin-top: 10px; }
    .mapping-row { grid-template-columns: 1fr; gap: 7px; }
    .time-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .icon-toolbar { grid-template-columns: 1fr 1fr; }
    .chart-stage { padding: 8px; }
    .info-grid, .steps, .seo-guide-grid { grid-template-columns: 1fr; }
    .seo-guide-grid { gap: 22px; }
    .padded-panel, .source-panel { padding: 17px; }
}

@media (max-width: 430px) {
    .sample-switch > span { width: 100%; }
    .sample-switch .mini-btn { flex: 1 1 40%; }
    .stats-grid, .time-columns, .icon-toolbar { grid-template-columns: 1fr; }
    .split-actions { gap: 8px; }
    .split-actions .btn { flex: 1; padding-inline: 10px; }
    .seek-row { grid-template-columns: 1fr 44px; }
    .seek-row > span:first-child { grid-column: 1 / -1; }
    .palette-template { grid-template-columns: minmax(0, 1fr) 105px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}