:root {
  --draw-paper: #fbfaf9;
  --draw-paper-deep: #f1efed;
  --draw-white: #fff;
  --draw-ink: #24201f;
  --draw-muted: #625b57;
  --draw-quiet: #786e69;
  --draw-line: #dfd8d2;
  --draw-coral: #e97870;
  --draw-coral-deep: #b84f49;
  --draw-coral-soft: #fff0ed;
  --draw-green: #527662;
  --draw-green-deep: #3f6451;
  --draw-green-soft: #eef7f1;
  --draw-shadow: 0 18px 48px rgba(83, 63, 54, .13);
  --draw-font: "M PLUS Rounded 1c", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.rit-draw-page { margin: 0; background: var(--draw-paper); color: var(--draw-ink); font-family: var(--draw-font); font-size: 16px; line-height: 1.75; -webkit-font-smoothing: antialiased; }
button, input { font: inherit; }
button { color: inherit; }
a { color: inherit; text-underline-offset: .22em; }
::selection { background: #fff0b8; color: var(--draw-ink); }
:focus-visible { outline: 3px solid rgba(233, 120, 112, .42); outline-offset: 4px; }

.rit-draw-skip { position: fixed; inset-block-start: 8px; inset-inline-start: 8px; z-index: 100; padding: 9px 14px; border-radius: 10px; background: var(--draw-ink); color: #fff; font-size: .78rem; font-weight: 800; text-decoration: none; transform: translateY(-150%); }
.rit-draw-skip:focus { transform: none; }

.rit-draw-header { position: sticky; inset-block-start: 0; z-index: 20; display: flex; align-items: center; gap: 22px; min-height: 68px; padding: 10px max(24px, calc((100vw - 1120px) / 2)); border-block-end: 1px solid rgba(223, 216, 210, .82); background: rgba(251, 250, 249, .94); box-shadow: 0 8px 24px rgba(83, 63, 54, .04); backdrop-filter: blur(12px); }
.rit-draw-brand { display: inline-flex; align-items: center; gap: 10px; font-size: .92rem; text-decoration: none; }
.rit-draw-brand > span { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 11px; background: var(--draw-coral-deep); color: #fff; box-shadow: 0 6px 16px rgba(199, 95, 86, .22); font-size: .78rem; font-weight: 900; }
.rit-draw-brand strong { font-weight: 800; }
.rit-draw-tools-link { color: var(--draw-muted); font-size: .76rem; font-weight: 700; text-decoration: none; }
.rit-draw-tools-link:hover { color: var(--draw-coral-deep); }
.rit-draw-private { display: inline-flex; align-items: center; gap: 7px; margin-inline-start: auto; padding: 6px 10px; border-radius: 999px; background: var(--draw-green-soft); color: var(--draw-green-deep); font-size: .78rem; font-weight: 800; white-space: nowrap; }
.rit-draw-private svg { width: 15px; height: 15px; fill: currentColor; }

.rit-draw-intro, .rit-draw-workbench, .rit-draw-guide, .rit-draw-faq { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.rit-draw-intro { display: flex; align-items: end; justify-content: space-between; gap: 32px; padding-block: 34px 22px; }
.rit-draw-intro h1 { margin: 0; font-size: clamp(2.35rem, 6vw, 4.8rem); line-height: 1.08; letter-spacing: -.04em; }
.rit-draw-intro p { max-width: 32rem; margin: 0 0 5px; color: var(--draw-muted); font-size: .92rem; }

.rit-draw-workbench { overflow: hidden; border-radius: 16px; background: var(--draw-white); box-shadow: var(--draw-shadow); }
.rit-draw-toolbar { display: flex; align-items: center; gap: 10px; min-height: 72px; padding: 10px 12px; border-block-end: 1px solid var(--draw-line); background: #fffdfb; }
.rit-draw-tool-group, .rit-draw-history { display: flex; gap: 5px; }
.rit-draw-tool, .rit-draw-history button, .rit-draw-clear, .rit-draw-download { display: inline-flex; align-items: center; justify-content: center; gap: 7px; min-height: 44px; border: 0; border-radius: 11px; background: transparent; cursor: pointer; font-size: .78rem; font-weight: 800; transition: background-color 160ms ease, color 160ms ease, transform 160ms ease, box-shadow 160ms ease; }
.rit-draw-tool { min-width: 70px; padding-inline: 11px; }
.rit-draw-tool svg, .rit-draw-history svg, .rit-draw-download svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.rit-draw-tool:hover, .rit-draw-history button:hover:not(:disabled) { background: var(--draw-coral-soft); color: var(--draw-coral-deep); }
.rit-draw-tool.is-active { background: var(--draw-coral-deep); color: #fff; box-shadow: 0 6px 16px rgba(199, 95, 86, .22); }
.rit-draw-tool:active, .rit-draw-history button:active:not(:disabled), .rit-draw-download:active { transform: translateY(1px); }

.rit-draw-colors { display: flex; align-items: center; gap: 5px; padding-inline: 2px; }
.rit-color, .rit-color-custom { position: relative; display: grid; place-items: center; width: 32px; height: 32px; flex: 0 0 auto; border: 0; border-radius: 50%; background: transparent; cursor: pointer; }
.rit-color::before { content: ""; width: 22px; height: 22px; border: 2px solid #fff; border-radius: 50%; background: var(--swatch); box-shadow: 0 0 0 1px rgba(111, 78, 63, .24); transition: transform 150ms ease, box-shadow 150ms ease; }
.rit-color:hover::before { transform: scale(1.09); }
.rit-color.is-active::before { box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--draw-coral-deep); }
.rit-color-custom { margin-inline-start: 2px; border: 1px solid var(--draw-line); background: var(--draw-white); }
.rit-color-custom input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.rit-color-custom svg { width: 18px; height: 18px; fill: none; stroke: var(--draw-muted); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.rit-color-custom:hover { background: var(--draw-coral-soft); }
.rit-color-custom:focus-within { outline: 3px solid rgba(233, 120, 112, .42); outline-offset: 4px; }

.rit-draw-size { display: grid; grid-template-columns: auto minmax(72px, 112px) 28px; align-items: center; gap: 8px; min-width: 145px; margin-inline: 2px auto; color: var(--draw-muted); font-size: .78rem; font-weight: 800; }
.rit-draw-size output { color: var(--draw-coral-deep); font-variant-numeric: tabular-nums; text-align: end; }
.rit-draw-size input { width: 100%; height: 28px; margin: 0; accent-color: var(--draw-coral); cursor: pointer; }
.rit-draw-history button { width: 42px; padding: 0; }
.rit-draw-history button:disabled, .rit-draw-clear:disabled { cursor: not-allowed; opacity: .34; }
.rit-draw-clear { min-width: 66px; padding-inline: 10px; color: var(--draw-muted); }
.rit-draw-clear svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.rit-draw-clear:hover:not(:disabled) { background: var(--draw-coral-soft); color: var(--draw-coral-deep); }
.rit-draw-download { min-width: 112px; padding-inline: 15px; background: var(--draw-green); color: #fff; box-shadow: 0 8px 20px rgba(82, 118, 98, .18); }
.rit-draw-download:hover { background: var(--draw-green-deep); transform: translateY(-1px); }

.rit-draw-canvas-wrap { position: relative; height: min(66vh, 680px); min-height: 440px; overflow: hidden; background-color: #fff; }
.rit-draw-canvas-wrap.is-image-over { box-shadow: inset 0 0 0 4px var(--draw-coral); }
.rit-draw-canvas-wrap[data-background="transparent"] { background-color: #fff; background-image: linear-gradient(45deg, var(--draw-line) 25%, transparent 25%), linear-gradient(-45deg, var(--draw-line) 25%, transparent 25%), linear-gradient(45deg, transparent 75%, var(--draw-line) 75%), linear-gradient(-45deg, transparent 75%, var(--draw-line) 75%); background-position: 0 0, 0 8px, 8px -8px, -8px 0; background-size: 16px 16px; }
#rit-canvas { position: absolute; inset: 0; display: block; width: 100%; height: 100%; cursor: crosshair; touch-action: none; }
#rit-canvas.is-erasing { cursor: cell; }
#rit-canvas.is-adding-text { cursor: text; }
#rit-canvas.is-adding-shape { cursor: crosshair; }
#rit-canvas.is-selecting { cursor: default; }
.rit-draw-empty { position: absolute; inset: 0; display: grid; place-content: center; justify-items: center; color: var(--draw-quiet); text-align: center; pointer-events: none; transition: opacity 220ms ease, transform 220ms cubic-bezier(.22,1,.36,1); }
.rit-draw-empty svg { width: 54px; height: 54px; margin-block-end: 10px; fill: none; stroke: var(--draw-coral); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.rit-draw-empty strong { color: var(--draw-muted); font-size: .95rem; }
.rit-draw-empty span { margin-block-start: 2px; font-size: .78rem; }
.rit-draw-empty.is-hidden { opacity: 0; transform: translateY(8px); }
.rit-text-entry { position: absolute; z-index: 4; display: flex; align-items: center; gap: 5px; max-width: min(360px, calc(100% - 20px)); padding: 6px; border-radius: 12px; background: #fff; box-shadow: 0 12px 32px rgba(83, 63, 54, .18); }
.rit-text-entry[hidden] { display: none; }
.rit-text-entry input { min-width: 0; width: 220px; height: 40px; padding: 0 10px; border: 1px solid var(--draw-line); border-radius: 10px; color: var(--draw-ink); outline: 0; }
.rit-text-entry input:focus { border-color: var(--draw-coral); box-shadow: 0 0 0 3px rgba(233, 120, 112, .18); }
.rit-text-entry button { min-width: 42px; height: 40px; padding: 0 10px; border: 0; border-radius: 10px; background: var(--draw-green); color: #fff; cursor: pointer; font-size: .78rem; font-weight: 800; }
.rit-text-entry button:last-child { min-width: 40px; padding: 0; background: var(--draw-coral-soft); color: var(--draw-coral-deep); }
.rit-shape-menu, .rit-elements-menu { position: absolute; z-index: 5; inset-block-start: 10px; inset-inline-start: 10px; display: flex; align-items: center; gap: 5px; padding: 7px; border-radius: 12px; background: #fff; box-shadow: 0 12px 32px rgba(83, 63, 54, .18); }
.rit-elements-menu { inset-inline-start: auto; inset-inline-end: 10px; }
.rit-shape-menu[hidden], .rit-elements-menu[hidden] { display: none; }
.rit-shape-menu button, .rit-elements-menu button { display: grid; justify-items: center; gap: 2px; min-width: 58px; min-height: 54px; padding: 6px; border: 0; border-radius: 10px; background: transparent; color: var(--draw-muted); cursor: pointer; font-size: .68rem; font-weight: 800; }
.rit-shape-menu button:hover, .rit-shape-menu button.is-active, .rit-elements-menu button:hover { background: var(--draw-coral-soft); color: var(--draw-coral-deep); }
.rit-shape-menu svg, .rit-elements-menu svg, .rit-selection-delete svg { width: 23px; height: 23px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.rit-fill-choice { display: grid; justify-items: center; gap: 2px; min-width: 76px; padding: 5px; color: var(--draw-muted); cursor: pointer; font-size: .68rem; font-weight: 800; }
.rit-fill-choice input { width: 20px; height: 20px; margin: 0; accent-color: var(--draw-coral-deep); }
.rit-selection-delete { position: absolute; z-index: 4; inset-block-end: 12px; inset-inline-end: 12px; display: inline-flex; align-items: center; gap: 6px; min-height: 42px; padding: 0 12px; border: 0; border-radius: 10px; background: #fff; color: var(--draw-coral-deep); box-shadow: 0 8px 24px rgba(83, 63, 54, .16); cursor: pointer; font-size: .75rem; font-weight: 800; }
.rit-selection-delete[hidden] { display: none; }
.rit-selection-delete:hover { background: var(--draw-coral-soft); }

.rit-draw-bottom-bar { display: flex; align-items: center; justify-content: space-between; gap: 14px; min-height: 58px; padding: 9px 14px; border-block-start: 1px solid var(--draw-line); background: #fffdfb; }
.rit-canvas-size { display: flex; align-items: center; gap: 7px; color: var(--draw-muted); font-size: .78rem; font-weight: 800; white-space: nowrap; }
.rit-canvas-size select { min-height: 38px; padding: 0 30px 0 10px; border: 1px solid var(--draw-line); border-radius: 10px; background: #fff; color: var(--draw-ink); cursor: pointer; font-size: .78rem; font-weight: 700; }
.rit-background-choice { display: flex; align-items: center; gap: 5px; color: var(--draw-muted); font-size: .78rem; font-weight: 800; }
.rit-background-choice > span { margin-inline-end: 3px; }
.rit-background-choice button { display: inline-flex; align-items: center; gap: 6px; min-height: 36px; padding: 0 10px; border: 1px solid transparent; border-radius: 10px; background: transparent; color: var(--draw-muted); cursor: pointer; font-size: .78rem; font-weight: 800; }
.rit-background-choice button:hover { background: var(--draw-coral-soft); }
.rit-background-choice button.is-active { border-color: var(--draw-coral); background: var(--draw-coral-soft); color: var(--draw-coral-deep); }
.rit-background-choice i { width: 16px; height: 16px; border: 1px solid var(--draw-line); border-radius: 10px; background: #fff; }
.rit-background-choice button[data-background="transparent"] i { background-color: #fff; background-image: linear-gradient(45deg, #ddd 25%, transparent 25%), linear-gradient(-45deg, #ddd 25%, transparent 25%), linear-gradient(45deg, transparent 75%, #ddd 75%), linear-gradient(-45deg, transparent 75%, #ddd 75%); background-position: 0 0, 0 4px, 4px -4px, -4px 0; background-size: 8px 8px; }
.rit-draw-status { margin: 0; color: var(--draw-quiet); font-size: .78rem; text-align: end; }
.rit-draw-status.is-error { color: var(--draw-coral-deep); font-weight: 700; }

.rit-draw-guide { display: grid; grid-template-columns: 1.05fr .95fr; gap: 72px; align-items: start; padding-block: 88px; }
.rit-draw-guide h2, .rit-draw-faq h2 { margin: 0; font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1.2; letter-spacing: -.035em; }
.rit-draw-guide p { max-width: 64ch; margin: 20px 0 0; color: var(--draw-muted); }
.rit-draw-guide dl { margin: 0; }
.rit-draw-guide dl > div { display: grid; grid-template-columns: 118px 1fr; gap: 16px; padding: 17px 0; border-block-end: 1px solid var(--draw-line); }
.rit-draw-guide dt { color: var(--draw-quiet); font-size: .78rem; }
.rit-draw-guide dd { margin: 0; font-size: .78rem; font-weight: 800; }
.rit-draw-faq { padding-block: 0 88px; }
.rit-draw-faq > div { margin-block-start: 28px; border-block-start: 1px solid var(--draw-line); }
.rit-draw-faq details { border-block-end: 1px solid var(--draw-line); }
.rit-draw-faq summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 21px 4px; font-weight: 800; cursor: pointer; list-style: none; }
.rit-draw-faq summary::-webkit-details-marker { display: none; }
.rit-draw-faq summary::after { content: "+"; color: var(--draw-coral-deep); font-size: 1rem; font-weight: 500; }
.rit-draw-faq details[open] summary::after { content: "−"; }
.rit-draw-faq details p { max-width: 72ch; margin: -6px 0 22px; color: var(--draw-muted); font-size: .95rem; }
.rit-draw-footer { display: grid; justify-items: center; gap: 7px; padding: 42px 24px; border-block-start: 1px solid var(--draw-line); background: #fff7f0; text-align: center; }
.rit-draw-footer p { margin: 3px 0; color: var(--draw-muted); font-size: .8rem; }
.rit-draw-footer small { color: var(--draw-quiet); font-size: .78rem; }

@media (max-width: 980px) {
  .rit-draw-intro { display: block; }
  .rit-draw-intro p { margin-block-start: 10px; }
  .rit-draw-toolbar { flex-wrap: wrap; }
  .rit-draw-size { margin-inline-start: auto; }
  .rit-draw-history { margin-inline-start: auto; }
  .rit-draw-canvas-wrap { height: min(62vh, 620px); }
}

@media (max-width: 680px) {
  .rit-draw-header { min-height: 62px; padding-inline: 14px; }
  .rit-draw-tools-link { display: none; }
  .rit-draw-private { font-size: .78rem; }
  .rit-draw-brand { font-size: .78rem; }
  .rit-draw-brand > span { width: 31px; height: 31px; }
  .rit-draw-intro, .rit-draw-workbench, .rit-draw-guide, .rit-draw-faq { width: calc(100% - 28px); }
  .rit-draw-intro { padding-block: 20px 16px; }
  .rit-draw-intro h1 { font-size: clamp(1.8rem, 8vw, 2.35rem); }
  .rit-draw-intro p { margin-block-start: 6px; font-size: .75rem; line-height: 1.6; }
  .rit-draw-workbench { border-radius: 14px; }
  .rit-draw-toolbar { gap: 7px; padding: 9px; }
  .rit-draw-tool-group { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); width: 100%; }
  .rit-draw-tool { min-height: 48px; min-width: 0; padding-inline: 6px; }
  .rit-draw-tool span { display: none; }
  .rit-draw-colors { order: 3; width: 100%; justify-content: space-between; gap: 0; padding: 3px 0 0; }
  .rit-color, .rit-color-custom { width: 48px; height: 48px; }
  .rit-color::before { width: 24px; height: 24px; }
  .rit-draw-size { grid-template-columns: auto minmax(72px, 1fr) 27px; min-width: 0; flex: 1; margin-inline: 0; }
  .rit-draw-size { order: 2; flex: 1 0 100%; width: 100%; }
  .rit-draw-size > span { white-space: nowrap; }
  .rit-draw-history { margin-inline-start: 0; }
  .rit-draw-history button { width: 48px; min-height: 48px; }
  .rit-draw-clear { min-height: 48px; margin-inline-start: auto; }
  .rit-draw-clear span { display: none; }
  .rit-draw-download { width: 100%; min-height: 48px; order: 4; }
  .rit-text-entry { max-width: calc(100% - 16px); }
  .rit-text-entry input { width: min(180px, 48vw); }
  .rit-text-entry button { min-width: 48px; height: 48px; }
  .rit-shape-menu { inset-inline: 8px; overflow-x: auto; max-width: calc(100% - 16px); }
  .rit-elements-menu { inset-inline: 8px; overflow-x: auto; max-width: calc(100% - 16px); }
  .rit-shape-menu button, .rit-elements-menu button { min-width: 58px; min-height: 58px; }
  .rit-fill-choice { min-width: 82px; }
  .rit-selection-delete { min-height: 48px; }
  .rit-draw-canvas-wrap { height: 58dvh; min-height: 390px; max-height: 590px; }
  .rit-draw-empty svg { width: 46px; height: 46px; }
  .rit-draw-bottom-bar { align-items: flex-start; flex-direction: column; gap: 6px; padding: 10px; }
  .rit-canvas-size { width: 100%; justify-content: space-between; }
  .rit-canvas-size select { min-height: 48px; max-width: 58%; }
  .rit-background-choice { width: 100%; }
  .rit-background-choice > span { margin-inline-end: auto; }
  .rit-background-choice button { min-height: 48px; }
  .rit-draw-status { width: 100%; text-align: start; }
  .rit-draw-guide { grid-template-columns: 1fr; gap: 34px; padding-block: 64px; }
  .rit-draw-guide dl > div { grid-template-columns: 94px 1fr; }
  .rit-draw-faq { padding-block-end: 64px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}