:root {
  --rit-paper: #fffaf4;
  --rit-paper-deep: #fff2e7;
  --rit-white: #fffefb;
  --rit-ink: #544b47;
  --rit-muted: #70645f;
  --rit-quiet: #766761;
  --rit-line: #eadbd1;
  --rit-coral: #e97870;
  --rit-coral-deep: #c75f56;
  --rit-coral-soft: #fff0e5;
  --rit-green: #527662;
  --rit-green-deep: #3f6451;
  --rit-green-soft: #f0faf3;
  --rit-yellow: #fff1bd;
  --rit-shadow: 0 16px 42px rgba(111, 78, 63, .12);
  --rit-font: "M PLUS Rounded 1c", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
html { scrollbar-color: var(--rit-coral) var(--rit-paper-deep); scrollbar-width: thin; }
html::-webkit-scrollbar { width: 11px; }
html::-webkit-scrollbar-track { background: var(--rit-paper-deep); }
html::-webkit-scrollbar-thumb { border: 3px solid var(--rit-paper-deep); border-radius: 999px; background: var(--rit-coral); }
body.rit-page { margin: 0; background: var(--rit-paper); color: var(--rit-ink); font-family: var(--rit-font); font-size: 16px; line-height: 1.75; }
body.rit-page ::selection { background: var(--rit-yellow); color: #4b443f; }
body.rit-page a { color: inherit; text-decoration-thickness: .08em; text-underline-offset: .22em; }
body.rit-page button, body.rit-page input { font: inherit; }
body.rit-page button { color: inherit; }
body.rit-page :focus-visible { outline: 3px solid rgba(233, 120, 112, .45); outline-offset: 4px; }

.rit-skip { position: fixed; inset-block-start: 8px; inset-inline-start: 8px; z-index: 100; padding: 10px 14px; border-radius: 10px; background: var(--rit-ink); color: #fff !important; transform: translateY(-160%); transition: transform .2s ease-out; }
.rit-skip:focus { transform: translateY(0); }

.rit-header { position: sticky; inset-block-start: 0; z-index: 20; display: flex; align-items: center; gap: 28px; min-height: 72px; padding: 12px max(24px, calc((100vw - 1120px) / 2)); border-block-end: 1px solid rgba(234, 219, 209, .88); background: rgba(255, 250, 244, .94); box-shadow: 0 8px 24px rgba(111, 78, 63, .04); }
.rit-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--rit-ink); font-weight: 800; text-decoration: none; letter-spacing: -.02em; }
.rit-brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 11px; background: var(--rit-coral); color: #fff; font-weight: 900; box-shadow: 0 6px 16px rgba(199, 95, 86, .22); }
.rit-nav { display: flex; align-items: center; gap: 22px; margin-inline-start: auto; }
.rit-nav a, .rit-back-home { color: var(--rit-muted); font-size: .82rem; font-weight: 700; text-decoration: none; }
.rit-nav a:hover, .rit-back-home:hover { color: var(--rit-coral-deep); }
.rit-local-badge { display: inline-flex; align-items: center; gap: 6px; padding: 7px 11px; border-radius: 999px; background: var(--rit-green-soft); color: var(--rit-green-deep); font-size: .72rem; font-weight: 800; }
.rit-local-badge svg { width: 15px; height: 15px; fill: currentColor; }

.rit-hero { position: relative; overflow: hidden; padding: 24px max(24px, calc((100vw - 1280px) / 2)) 48px; }
.rit-hero::before { display: none; }
.rit-hero-copy { max-width: 1040px; margin: 0 auto 18px; text-align: center; }
.rit-hero h1 { margin: 0; font-size: clamp(1.75rem, 3vw, 2.6rem); line-height: 1.2; letter-spacing: -.03em; text-wrap: balance; }
.rit-hero-copy > p:last-child { max-width: 760px; margin: 8px auto 0; color: var(--rit-muted); font-size: .9rem; }

.rit-tool { max-width: 1280px; margin: 0 auto; padding: clamp(18px, 2.2vw, 28px); border-radius: 16px; background: var(--rit-white); box-shadow: var(--rit-shadow); }
.rit-file-input { position: absolute; inline-size: 1px; block-size: 1px; opacity: 0; pointer-events: none; }
.rit-dropzone { display: grid; place-items: center; align-content: center; width: 100%; min-height: 330px; padding: 36px 20px; border: 2px dashed #eeb1a8; border-radius: 14px; background: #fff9f5; cursor: pointer; transition: border-color .2s ease-out, background .2s ease-out, box-shadow .2s ease-out; }
.rit-dropzone:hover, .rit-dropzone.is-dragging { border-color: var(--rit-coral); background: var(--rit-coral-soft); box-shadow: inset 0 0 0 4px rgba(233, 120, 112, .08); }
.rit-drop-icon { display: grid; place-items: center; width: 64px; height: 64px; margin-block-end: 18px; border-radius: 50%; background: var(--rit-coral); color: #fff; box-shadow: 0 8px 20px rgba(199, 95, 86, .2); }
.rit-drop-icon svg { width: 28px; height: 28px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.rit-dropzone strong { font-size: clamp(1.08rem, 2vw, 1.3rem); }
.rit-dropzone > span:not(.rit-drop-icon) { margin-block-start: 4px; color: var(--rit-muted); font-size: .85rem; }
.rit-dropzone small { margin-block-start: 12px; color: var(--rit-quiet); font-size: .78rem; }

.rit-controls { display: grid; grid-template-columns: minmax(230px, 1fr) 180px; gap: 24px; align-items: end; margin-block-start: 22px; padding: 22px; border-radius: 14px; background: #fff8ed; }
.rit-quality-control, .rit-width-control { display: grid; gap: 8px; color: var(--rit-muted); font-size: .78rem; font-weight: 700; }
.rit-quality-control > span { display: flex; justify-content: space-between; }
.rit-quality-control strong { color: var(--rit-coral-deep); font-variant-numeric: tabular-nums; }
input[type="range"] { width: 100%; height: 8px; margin: 5px 0; border-radius: 999px; background: linear-gradient(90deg, var(--rit-coral) var(--range-progress, 80%), #eddcd3 var(--range-progress, 80%)); appearance: none; cursor: pointer; }
input[type="range"]::-webkit-slider-thumb { width: 22px; height: 22px; border: 4px solid #fff; border-radius: 50%; background: var(--rit-coral); box-shadow: 0 3px 10px rgba(111, 78, 63, .24); appearance: none; }
input[type="range"]::-moz-range-thumb { width: 14px; height: 14px; border: 4px solid #fff; border-radius: 50%; background: var(--rit-coral); box-shadow: 0 3px 10px rgba(111, 78, 63, .24); }
.rit-number-wrap { display: flex; align-items: center; border: 1px solid var(--rit-line); border-radius: 11px; background: #fff; }
.rit-number-wrap input { min-width: 0; width: 100%; height: 42px; padding: 0 8px 0 12px; border: 0; background: transparent; color: var(--rit-ink); font-size: 16px; font-variant-numeric: tabular-nums; outline: 0; }
.rit-number-wrap small { padding-inline-end: 12px; color: var(--rit-quiet); }
.rit-download-actions { display: flex; gap: 10px; }
.rit-button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 15px; border: 0; border-radius: 11px; font-size: .76rem; font-weight: 800; cursor: pointer; transition: background .2s ease-out, color .2s ease-out, box-shadow .2s ease-out, transform .2s ease-out; }
.rit-button:not(:disabled):hover { transform: translateY(-1px); }
.rit-button:disabled { cursor: not-allowed; opacity: .48; }
.rit-button-primary { background: var(--rit-green); color: #fff !important; box-shadow: 0 8px 20px rgba(82, 118, 98, .18); }
.rit-button-primary:not(:disabled):hover { background: var(--rit-green-deep); }
.rit-button-primary svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.rit-button-secondary { background: var(--rit-coral-soft); color: var(--rit-coral-deep); }
.rit-button-secondary:not(:disabled):hover { background: #ffe5d9; }

.rit-batch-bar { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-block-start: 22px; padding: 18px 20px; border: 1px solid var(--rit-line); border-radius: 14px; background: var(--rit-white); }
.rit-batch-bar.is-empty { padding-block: 13px; background: transparent; }
.rit-batch-summary { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; min-width: 0; }
.rit-status { min-height: 24px; color: var(--rit-quiet); font-size: .8rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.rit-status.is-error { color: #a3423c; }
.rit-clear-all { padding: 3px 0; border: 0; border-block-end: 1px solid currentColor; background: transparent; color: var(--rit-coral-deep); font-size: .72rem; font-weight: 800; cursor: pointer; }
.rit-clear-all:disabled { display: none; }
.rit-results { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-block-start: 24px; }
.rit-result { display: flex; flex-direction: column; min-width: 0; padding: 18px; border: 1px solid var(--rit-line); border-radius: 16px; background: #fffaf6; }
.rit-result.is-ready { animation: rit-conversion-complete .48s cubic-bezier(.16, 1, .3, 1); }
@keyframes rit-conversion-complete {
  0% { background: var(--rit-green-soft); box-shadow: 0 10px 26px rgba(82, 118, 98, .16); }
  100% { background: #fffaf6; box-shadow: 0 0 0 rgba(82, 118, 98, 0); }
}
.rit-result-head { display: flex; align-items: center; gap: 10px; min-width: 0; margin-block-end: 16px; }
.rit-result-head h3 { overflow: hidden; margin: 0; font-size: .76rem; text-overflow: ellipsis; white-space: nowrap; }
.rit-result-index { flex: 0 0 auto; color: var(--rit-quiet); font-size: .66rem; font-weight: 900; font-variant-numeric: tabular-nums; }
.rit-result-comparison { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.rit-result-comparison figure { min-width: 0; margin: 0; }
.rit-result-comparison figcaption { margin-block-end: 8px; color: var(--rit-ink); font-size: .78rem; font-weight: 900; text-align: center; }
.rit-result-preview { position: relative; overflow: hidden; width: 100%; aspect-ratio: 16 / 9; border-radius: 12px; background: #f0e8e2; }
.rit-result-preview img { width: 100%; height: 100%; object-fit: contain; }
.rit-result-stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-block-start: 10px; }
.rit-result-stats > div { display: grid; place-content: center; min-height: 68px; padding: 8px; border-radius: 12px; background: #fff; text-align: center; }
.rit-result-stats span { color: var(--rit-quiet); font-size: .64rem; font-weight: 800; }
.rit-result-stats strong { margin-block-start: 2px; font-size: 1rem; font-variant-numeric: tabular-nums; }
.rit-result-stats small { color: var(--rit-green-deep); font-size: .68rem; font-weight: 900; }
.rit-result-quality { display: grid; gap: 7px; min-width: 0; margin-block-start: 10px; padding: 11px 12px; border-radius: 12px; background: #f8eee7; }
.rit-result-quality label { display: flex; justify-content: space-between; color: var(--rit-muted); font-size: .76rem; font-weight: 700; }
.rit-result-quality output { color: var(--rit-coral-deep); font-weight: 800; font-variant-numeric: tabular-nums; }
.rit-size-toggle { align-self: flex-start; margin-block-start: 9px; padding: 0; border: 0; border-block-end: 1px solid currentColor; background: transparent; color: var(--rit-coral-deep); font-size: .68rem; font-weight: 800; cursor: pointer; }
.rit-result-size { display: none; min-width: 0; margin: 10px 0 0; padding: 12px; border: 0; border-radius: 12px; background: #fff; }
.rit-result.has-size-open .rit-result-size { display: block; }
.rit-result-size legend { width: 100%; padding: 0; color: var(--rit-muted); font-size: .74rem; font-weight: 800; }
.rit-size-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-block-start: 9px; }
.rit-size-fields label { color: var(--rit-quiet); font-size: .66rem; font-weight: 700; }
.rit-size-fields input { width: 100%; height: 40px; margin-block-start: 4px; padding: 0 9px; border: 1px solid var(--rit-line); border-radius: 10px; background: #fffdfb; color: var(--rit-ink); font-size: 16px; font-variant-numeric: tabular-nums; }
.rit-aspect-lock { display: inline-flex; align-items: center; gap: 7px; margin-block-start: 10px; color: var(--rit-muted); font-size: .68rem; font-weight: 700; cursor: pointer; }
.rit-aspect-lock input { accent-color: var(--rit-coral); }
.rit-result-state { min-height: 20px; margin: 9px 2px 0; color: var(--rit-quiet); font-size: .67rem; font-variant-numeric: tabular-nums; }
.rit-result-actions { display: grid; grid-template-columns: 1.45fr .8fr; gap: 10px; margin-block-start: auto; padding-block-start: 12px; }
.rit-result-actions svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.rit-item-download { min-height: 44px; padding-inline: 12px; white-space: nowrap; }
.rit-button-danger { background: #f46d64; color: #fff !important; }
.rit-button-danger:not(:disabled):hover { background: #d85850; }
.rit-processing { color: var(--rit-coral-deep); }
.rit-error-text { color: #a3423c; }

.rit-how, .rit-explainer, .rit-faq, .rit-related, .rit-hub { max-width: 1120px; margin-inline: auto; }
.rit-how { padding: 64px 24px; }
.rit-how > h2, .rit-faq > h2 { margin: 0 0 26px; font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1.2; letter-spacing: -.035em; }
.rit-how ol { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; margin: 0; padding: 0; list-style: none; }
.rit-how li { min-width: 0; }
.rit-how li > img { display: block; width: 100%; height: auto; aspect-ratio: 3 / 2; border: 1px solid var(--rit-line); border-radius: 14px; background: var(--rit-white); object-fit: cover; box-shadow: 0 10px 28px rgba(111, 78, 63, .09); }
.rit-step-copy { display: flex; gap: 14px; padding: 18px 4px 0; }
.rit-step-copy > span { display: grid; place-items: center; flex: 0 0 auto; width: 34px; height: 34px; border-radius: 50%; background: var(--rit-coral-soft); color: var(--rit-coral-deep); font-size: .75rem; font-weight: 900; }
.rit-how h3 { margin: 0; font-size: .95rem; }
.rit-how p { margin: 6px 0 0; color: var(--rit-muted); font-size: .8rem; }
.rit-how .rit-step-note { margin-block-start: 22px; color: var(--rit-quiet); font-size: .74rem; }

.rit-explainer { display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: start; padding: 72px clamp(24px, 6vw, 72px); border-radius: 16px; background: var(--rit-ink); color: #fff; }
.rit-explainer h2 { max-width: 14ch; margin: 0; font-size: clamp(2rem, 4.5vw, 3.6rem); line-height: 1.15; letter-spacing: -.04em; }
.rit-explainer p { max-width: 68ch; margin: 22px 0 0; color: #e5dbd5; }
.rit-format-list { margin: 0; }
.rit-format-list > div { display: grid; grid-template-columns: 120px 1fr; gap: 14px; padding: 17px 0; border-block-end: 1px solid rgba(255,255,255,.14); }
.rit-format-list dt { color: #cfc0b8; font-size: .75rem; }
.rit-format-list dd { margin: 0; font-size: .85rem; font-weight: 700; }

.rit-faq { padding: 88px 24px; }
.rit-faq-list { border-block-start: 1px solid var(--rit-line); }
.rit-faq details { border-block-end: 1px solid var(--rit-line); }
.rit-faq summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px 4px; font-weight: 800; cursor: pointer; list-style: none; }
.rit-faq summary::-webkit-details-marker { display: none; }
.rit-faq summary::after { content: "+"; color: var(--rit-coral-deep); font-size: 1.35rem; font-weight: 500; }
.rit-faq details[open] summary::after { content: "−"; }
.rit-faq details p { max-width: 72ch; margin: -7px 0 22px; color: var(--rit-muted); font-size: .88rem; }
.rit-related { display: flex; align-items: center; justify-content: space-between; gap: 28px; margin-block-end: 72px; padding: 30px 34px; border-radius: 14px; background: var(--rit-coral-soft); }
.rit-related h2 { margin: 0; font-size: 1.2rem; }
.rit-related p { margin: 5px 0 0; color: var(--rit-muted); font-size: .8rem; }
.rit-related a { flex: 0 0 auto; color: var(--rit-coral-deep); font-size: .82rem; font-weight: 800; text-decoration: none; }

.rit-footer { display: grid; justify-items: center; gap: 8px; padding: 44px 24px; border-block-start: 1px solid var(--rit-line); background: #fff7f0; text-align: center; }
.rit-footer p { margin: 3px 0; color: var(--rit-muted); font-size: .8rem; }
.rit-footer small { color: var(--rit-quiet); font-size: .7rem; }

.rit-hub { padding: 80px 24px 100px; }
.rit-hub-intro { max-width: 760px; }
.rit-hub-intro h1 { margin: 0; font-size: clamp(2.5rem, 6vw, 5rem); line-height: 1.08; letter-spacing: -.04em; }
.rit-hub-intro p { max-width: 60ch; margin: 24px 0 0; color: var(--rit-muted); font-size: 1.05rem; }
.rit-tool-directory { display: grid; grid-template-columns: .62fr 1.38fr; gap: 64px; margin-block-start: 72px; }
.rit-tool-directory h2 { margin: 0; font-size: clamp(1.6rem, 3vw, 2.4rem); letter-spacing: -.03em; }
.rit-tool-directory > div:first-child p { color: var(--rit-muted); }
.rit-directory-list { display: grid; gap: 9px; }
.rit-directory-item { display: grid; grid-template-columns: 52px minmax(0,1fr) auto; gap: 14px; align-items: center; min-width: 0; padding: 14px; border-radius: 14px; background: var(--rit-white); color: var(--rit-ink); text-decoration: none; }
.rit-directory-item.is-live { box-shadow: var(--rit-shadow); }
.rit-directory-item.is-live:hover { background: #fff; }
.rit-directory-code { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 12px; background: var(--rit-coral-soft); color: var(--rit-coral-deep); font-size: .68rem; font-weight: 900; }
.rit-directory-item h3 { margin: 0; font-size: .92rem; }
.rit-directory-item p { margin: 3px 0 0; color: var(--rit-muted); font-size: .72rem; }
.rit-directory-item > strong, .rit-directory-item > span:last-child { color: var(--rit-coral-deep); font-size: .72rem; }
.rit-directory-item:not(.is-live) { opacity: .72; }

@media (max-width: 1100px) {
  .rit-results { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .rit-header { padding-inline: 20px; }
  .rit-nav { display: none; }
  .rit-local-badge { margin-inline-start: auto; }
  .rit-controls { grid-template-columns: 1fr 150px; }
  .rit-download-actions .rit-button { flex: 1; }
  .rit-how ol { grid-template-columns: 1fr; gap: 34px; }
  .rit-how li { max-width: 680px; }
  .rit-explainer { grid-template-columns: 1fr; gap: 42px; margin-inline: 20px; }
  .rit-tool-directory { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 640px) {
  .rit-header { min-height: 64px; }
  .rit-brand { font-size: .88rem; }
  .rit-brand-mark { width: 31px; height: 31px; }
  .rit-local-badge { padding: 6px 9px; font-size: .64rem; }
  .rit-hero { padding: 18px 14px 34px; }
  .rit-hero::before { display: none; }
  .rit-hero-copy { margin-block-end: 14px; }
  .rit-hero h1 { font-size: 1.55rem; }
  .rit-hero-copy > p:last-child { margin-block-start: 6px; font-size: .78rem; line-height: 1.6; }
  .rit-tool { padding: 14px; border-radius: 14px; }
  .rit-dropzone { min-height: 280px; }
  .rit-controls { grid-template-columns: 1fr; }
  .rit-width-control { grid-row: 2; }
  .rit-batch-bar { align-items: stretch; flex-direction: column; }
  .rit-download-actions { flex-direction: column; }
  .rit-button { min-height: 48px; }
  .rit-results { grid-template-columns: 1fr; }
  .rit-result { padding: 16px; }
  .rit-how { padding-block: 52px; }
  .rit-how ol { gap: 30px; }
  .rit-step-copy { padding-inline: 2px; }
  .rit-explainer { margin-inline: 0; padding: 48px 24px; border-radius: 0; }
  .rit-format-list > div { grid-template-columns: 100px 1fr; }
  .rit-faq { padding-block: 64px; }
  .rit-related { align-items: flex-start; flex-direction: column; margin-inline: 14px; margin-block-end: 54px; }
  .rit-hub { padding: 54px 18px 80px; }
  .rit-tool-directory { margin-block-start: 52px; }
  .rit-directory-item { grid-template-columns: 46px minmax(0,1fr); }
  .rit-directory-code { width: 46px; height: 46px; }
  .rit-directory-item > strong, .rit-directory-item > span:last-child { grid-column: 2; }
}

@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; }
}