:root {
    color-scheme: light;
    --ink: #20242b;
    --muted: #626a77;
    --line: #e2e5e9;
    --surface: #ffffff;
    --background: #f7f8fa;
    --accent: #9b7621;
    --accent-dark: #765a16;
    --danger: #b42318;
    font-family: Raleway, "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--background); }
body { min-height: 100vh; margin: 0; color: var(--ink); background: var(--background); }
button, input, select { font: inherit; }
button { color: inherit; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }

.color-header { min-height: 76px; padding: 9px max(22px, calc((100vw - 1200px) / 2)); display: flex; justify-content: space-between; align-items: center; gap: 20px; background: var(--surface); border-bottom: 1px solid var(--line); }
.wordmark { width: min(220px, 52vw); display: block; }
.wordmark img { width: 100%; height: auto; display: block; }
.top-nav { display: flex; align-items: center; gap: 16px; }
.top-nav a, .back-link { color: #4f5865; font-size: .9rem; font-weight: 700; text-decoration: none; }
.top-nav a:hover, .back-link:hover { color: var(--accent-dark); text-decoration: underline; text-underline-offset: 3px; }
.install-button, .primary-button { min-height: 42px; padding: 9px 15px; color: #fff; background: var(--accent); border: 1px solid var(--accent); border-radius: 6px; font-weight: 750; cursor: pointer; }
.install-button:hover, .primary-button:hover { background: var(--accent-dark); border-color: var(--accent-dark); }

.color-main { width: min(100% - 40px, 1120px); margin: 0 auto; padding: 26px 0 48px; }
.back-link { display: inline-block; margin-bottom: 22px; }
.page-intro { max-width: 720px; margin-bottom: 28px; }
.eyebrow { margin: 0 0 7px; color: var(--accent-dark); font-size: .72rem; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 9px; font-family: Cinzel, Georgia, serif; font-size: clamp(2rem, 5vw, 3rem); letter-spacing: -.03em; line-height: 1.15; }
.page-intro > p:last-child { margin-bottom: 0; color: var(--muted); font-size: 1.02rem; line-height: 1.65; }
.tool-panel { min-width: 0; padding: clamp(18px, 3vw, 26px); background: var(--surface); border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 8px 28px rgb(25 34 48 / 4%); }
.palette-panel { margin-bottom: 18px; }
.panel-heading { display: flex; justify-content: space-between; gap: 20px; }
h2 { margin-bottom: 7px; font-size: 1.35rem; letter-spacing: -.015em; }
h3 { margin-bottom: 4px; font-size: 1rem; }
.panel-description { margin-bottom: 18px; color: var(--muted); font-size: .9rem; line-height: 1.55; }
.palette-controls { display: grid; grid-template-columns: minmax(160px, 1fr) minmax(160px, 1fr) auto; align-items: end; gap: 12px; }
.field { min-width: 0; display: grid; gap: 6px; }
.field > span:first-child { color: #4c5562; font-size: .82rem; font-weight: 750; }
.field input[type="text"], .field select { width: 100%; min-height: 42px; padding: 9px 11px; color: var(--ink); background: #fff; border: 1px solid #cbd1d9; border-radius: 6px; }
.field select { cursor: pointer; }
.seed-control, .converter-input, .color-entry { min-width: 0; display: flex; align-items: center; gap: 8px; }
.seed-control input[type="color"], .converter-input input[type="color"], .color-entry input[type="color"] { width: 42px; height: 42px; flex: 0 0 42px; padding: 3px; background: #fff; border: 1px solid #cbd1d9; border-radius: 6px; cursor: pointer; }
.seed-control input[type="text"], .converter-input input[type="text"], .color-entry input[type="text"] { min-width: 0; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .95rem; }
.swatches { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin-top: 22px; }
.swatch { min-width: 0; overflow: hidden; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; transition: transform .14s ease, box-shadow .14s ease; }
.swatch.is-selected { border-color: var(--accent); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 25%, transparent); }
.swatch:hover { transform: translateY(-2px); box-shadow: 0 5px 18px rgb(25 34 48 / 12%); }
.swatch-select { width: 100%; padding: 0; display: block; text-align: left; background: transparent; border: 0; cursor: pointer; }
.swatch-color { min-height: 112px; display: block; }
.swatch-meta { padding: 9px 10px; display: grid; gap: 3px; }
.swatch-meta strong { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .85rem; }
.swatch-meta span { color: var(--muted); font-size: .72rem; }
.palette-color-options { margin-top: 12px; padding: 12px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; background: #fafbfc; border: 1px solid var(--line); border-radius: 7px; }
.selected-color-info { min-width: 185px; display: flex; align-items: center; gap: 10px; }
.selected-color-chip { width: 38px; height: 38px; flex: 0 0 38px; border: 1px solid rgb(20 25 30 / 14%); border-radius: 6px; }
.selected-color-info > span:last-child { display: grid; gap: 2px; }
.selected-color-info strong { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .86rem; }
.selected-color-info span span { color: var(--muted); font-size: .75rem; }
.selected-color-actions, .palette-copy-actions { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }
.selected-color-actions .secondary-button, .palette-copy-actions .secondary-button { min-height: 34px; padding: 6px 9px; font-size: .76rem; }
.palette-format-note { flex: 1 0 100%; margin: -3px 0 0; color: var(--muted); font-size: .72rem; line-height: 1.45; }
.palette-actions { min-height: 45px; margin-top: 11px; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.secondary-button, .upload-button, .copy-button { min-height: 38px; padding: 8px 12px; color: #3e4753; background: #fff; border: 1px solid #cbd1d9; border-radius: 6px; font-size: .84rem; font-weight: 700; cursor: pointer; }
.secondary-button:hover, .upload-button:hover, .copy-button:hover { background: #f4f1e9; border-color: #c5b47f; }
.history-section { margin-top: 10px; padding: 16px 0 4px; border-top: 1px solid var(--line); }
.history-heading { display: flex; justify-content: space-between; align-items: start; gap: 12px; }
.history-heading h3 { margin-bottom: 3px; }
.history-heading p { margin-bottom: 12px; color: var(--muted); font-size: .78rem; line-height: 1.45; }
.history-count { flex: 0 0 auto; padding: 4px 8px; color: #4f5865; background: #f2f3f6; border-radius: 999px; font-size: .72rem; font-weight: 750; }
.history-list { max-height: 360px; margin: 0; padding: 0 4px 0 0; display: grid; gap: 7px; overflow-y: auto; list-style: none; }
.history-footer { min-height: 38px; padding-top: 7px; display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.clear-history-button { padding: 5px 8px; color: #626a77; background: transparent; border: 0; border-radius: 4px; font-size: .75rem; text-decoration: underline; text-underline-offset: 2px; cursor: pointer; }
.clear-history-button:hover { color: #a12b21; background: #fff0ee; }
.history-item { min-width: 0; padding: 8px 10px; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 12px; background: #fafbfc; border: 1px solid var(--line); border-radius: 7px; }
.history-colors { min-width: 0; display: flex; align-items: center; gap: 8px; }
.history-colors button { width: 28px; height: 28px; flex: 0 0 28px; padding: 0; border: 1px solid rgb(20 25 30 / 12%); border-radius: 5px; cursor: pointer; }
.history-colors button:hover { outline: 2px solid var(--accent); outline-offset: 1px; }
.history-colors time { overflow: hidden; color: var(--muted); font-size: .72rem; text-overflow: ellipsis; white-space: nowrap; }
.history-actions { display: flex; gap: 6px; }
.history-actions button { min-height: 32px; padding: 5px 8px; color: #3e4753; background: #fff; border: 1px solid #cbd1d9; border-radius: 5px; font-size: .72rem; font-weight: 700; cursor: pointer; }
.history-actions button:hover { background: #f4f1e9; border-color: #c5b47f; }
.history-empty { padding: 12px; color: var(--muted); background: #fafbfc; border-radius: 7px; font-size: .82rem; }
.inline-status { color: var(--muted); font-size: .8rem; }
.image-extractor { margin-top: 12px; padding-top: 17px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; border-top: 1px solid var(--line); }
.image-extractor > div { flex: 1 1 270px; }
.image-extractor p { margin: 0; color: var(--muted); font-size: .82rem; line-height: 1.5; }
.upload-button { display: inline-flex; align-items: center; justify-content: center; white-space: nowrap; }

.tool-columns { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 18px; align-items: stretch; }
.tool-columns .tool-panel { display: flex; flex-direction: column; }
.tool-columns .panel-description { min-height: 42px; margin-bottom: 15px; }
.converter-field { max-width: 360px; }
.field-error { min-height: 18px; margin: 5px 0 0; color: var(--danger); font-size: .8rem; }
.conversion-list { margin-top: 12px; border-top: 1px solid var(--line); }
.conversion-row { min-height: 50px; display: grid; grid-template-columns: 52px minmax(0, 1fr) auto; align-items: center; gap: 8px; border-bottom: 1px solid var(--line); }
.format-name { color: var(--muted); font-size: .78rem; font-weight: 800; text-transform: uppercase; }
.conversion-row output { overflow-wrap: anywhere; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .9rem; }
.copy-button { min-height: 32px; padding: 5px 9px; font-size: .75rem; }
#converter-status { margin-top: 7px; }
.pantone-reference { margin-top: 17px; padding-top: 15px; border-top: 1px solid var(--line); }
.pantone-reference h3 { margin-bottom: 5px; }
.pantone-reference > p { margin-bottom: 11px; color: var(--muted); font-size: .78rem; line-height: 1.5; }
.pantone-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.pantone-link { color: var(--accent-dark); font-size: .82rem; font-weight: 750; text-underline-offset: 3px; }
.pantone-reference .pantone-note { margin: 10px 0 0; font-size: .7rem; }
.contrast-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.color-entry { gap: 6px; }
.color-entry input[type="color"] { width: 38px; height: 38px; flex-basis: 38px; }
.color-entry input[type="text"] { padding-inline: 8px; }
.font-picker { margin-top: 12px; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 9px; }
.font-picker .field input { min-height: 38px; padding: 8px 10px; color: var(--ink); background: #fff; border: 1px solid #cbd1d9; border-radius: 6px; }
.font-picker .secondary-button { min-height: 38px; white-space: nowrap; }
.font-status { min-height: 18px; margin: 5px 0 0; color: var(--muted); font-size: .72rem; line-height: 1.45; }
.contrast-preview { min-height: 94px; margin-top: 16px; padding: 13px 16px; display: flex; flex-direction: column; justify-content: center; gap: 4px; border: 1px solid var(--line); border-radius: 7px; }
.contrast-preview strong { font-size: 1.35rem; }
.contrast-preview span { font-size: 1rem; }
.contrast-result { margin-top: 13px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.contrast-result > div:first-child { display: grid; gap: 2px; }
.contrast-result > div:first-child strong { font-size: 1.4rem; font-variant-numeric: tabular-nums; }
.contrast-result > div:first-child span { color: var(--muted); font-size: .74rem; }
.wcag-badges { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 5px; }
.wcag-badges span { padding: 5px 7px; color: #4b5563; background: #f1f3f5; border-radius: 4px; font-size: .68rem; font-weight: 800; }
.wcag-badges span.pass { color: #176b37; background: #e7f5ec; }
.wcag-badges span.fail { color: #a12b21; background: #fff0ee; }
.contrast-note { margin: auto 0 0; padding-top: 12px; color: var(--muted); font-size: .75rem; line-height: 1.5; }
.privacy-note { margin: 20px 0 0; color: var(--muted); text-align: center; font-size: .8rem; }
.toast { position: fixed; right: 18px; bottom: max(18px, env(safe-area-inset-bottom)); z-index: 10; max-width: calc(100vw - 36px); padding: 11px 16px; color: #fff; background: #252b34; border-radius: 7px; box-shadow: 0 8px 24px rgb(0 0 0 / 20%); font-size: .88rem; opacity: 0; pointer-events: none; transform: translateY(8px); transition: opacity .15s ease, transform .15s ease; }
.toast.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 780px) {
    .tool-columns { grid-template-columns: 1fr; }
    .tool-columns .panel-description { min-height: 0; }
}
@media (max-width: 560px) {
    .color-header { min-height: 66px; padding: 8px 13px; gap: 8px; }
    .wordmark { width: min(175px, 46vw); }
    .top-nav { gap: 10px; }
    .top-nav a { font-size: .8rem; }
    .install-button { min-height: 38px; padding: 7px 9px; font-size: .8rem; white-space: nowrap; }
    .color-main { width: min(100% - 26px, 1120px); padding-top: 18px; }
    .page-intro { margin-bottom: 20px; }
    .palette-controls { grid-template-columns: 1fr 1fr; }
    .palette-controls .primary-button { grid-column: 1 / -1; }
    .swatches { gap: 6px; }
    .swatch-color { min-height: 76px; }
    .swatch-meta { padding: 7px 5px; }
    .swatch-meta strong { font-size: .72rem; }
    .swatch-meta span { min-height: 1.8em; font-size: .63rem; }
    .palette-actions { align-items: flex-start; flex-direction: column-reverse; }
    .palette-copy-actions { width: 100%; }
    .palette-copy-actions .secondary-button { flex: 1 1 auto; }
    .selected-color-actions { width: 100%; }
    .history-item { grid-template-columns: minmax(0, 1fr); gap: 8px; }
    .history-actions { justify-content: flex-end; }
    .image-extractor { align-items: flex-start; }
    .image-extractor .inline-status { flex-basis: 100%; }
    .contrast-fields { grid-template-columns: 1fr; }
    .contrast-result { align-items: flex-start; flex-direction: column; }
    .wcag-badges { justify-content: flex-start; }
}
@media (max-width: 360px) {
    .swatch-color { min-height: 62px; }
    .swatch-meta strong { font-size: .66rem; }
}