:root {
  --ink: #171c3a;
  --ink-soft: #3c4266;
  --indigo: #272b61;
  --indigo-deep: #10142f;
  --paper: #f7f6f1;
  --surface: #ffffff;
  --line: #dedee8;
  --yellow: #ffd44d;
  --yellow-soft: #fff2b7;
  --mint: #d8f2e4;
  --red: #a9273f;
  --orange: #8f5800;
  --shadow: 0 18px 45px rgba(18, 22, 56, 0.10);
  color-scheme: light;
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { min-width: 320px; scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 90% 0%, rgba(255, 212, 77, 0.22), transparent 28rem),
    var(--paper);
  line-height: 1.6;
}

button, input, select, textarea { font: inherit; }
button, label, select, input[type="file"] { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .48; }

:focus-visible {
  outline: 3px solid #2f71ff;
  outline-offset: 3px;
}

.page-width { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }

.site-header {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 800; letter-spacing: .04em; }
.brand-mark { display: grid; place-items: center; width: 31px; height: 31px; border-radius: 9px; color: var(--ink); background: var(--yellow); font-size: 13px; font-weight: 900; letter-spacing: -.22em; padding-right: 5px; }
.header-note { margin: 0; color: var(--ink-soft); font-size: 13px; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, .83fr);
  gap: 55px;
  align-items: center;
  padding: 65px 0 72px;
}

.eyebrow, .section-kicker { margin: 0 0 10px; color: var(--indigo); font-size: 11px; font-weight: 800; letter-spacing: .16em; }
.hero h1 { max-width: 610px; margin: 0; font-size: clamp(2.4rem, 6vw, 5rem); line-height: 1.1; letter-spacing: -.06em; }
.hero h1 span { display: inline-block; position: relative; z-index: 0; }
.hero h1 span::after { position: absolute; content: ""; left: -4px; right: -4px; bottom: 2px; height: 13px; z-index: -1; border-radius: 4px; background: var(--yellow); transform: rotate(-1.5deg); }
.hero-lead { max-width: 590px; margin: 26px 0 0; color: var(--ink-soft); font-size: 17px; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 25px; }
.hero-badges span, .privacy-chip, .count-chip { border: 1px solid rgba(39, 43, 97, .18); border-radius: 999px; padding: 4px 10px; color: var(--indigo); background: rgba(255,255,255,.65); font-size: 12px; font-weight: 700; }
.hero-art { margin: 0; padding: 11px; border-radius: 22px; background: var(--indigo-deep); box-shadow: 0 20px 50px rgba(16, 20, 47, .23); transform: rotate(1.1deg); }
.hero-art img { display: block; width: 100%; height: auto; aspect-ratio: 1672 / 941; object-fit: cover; border-radius: 14px; }
.hero-art figcaption { padding: 9px 4px 0; color: #dce0ff; font-size: 12px; }

.workspace, .output-preview { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.panel, .cue-card { min-width: 0; border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.88); box-shadow: var(--shadow); }
.panel { padding: 27px; }
.panel-heading, .section-heading-row, .cue-card-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; }
.panel h2, .compare h2 { margin: 0; font-size: clamp(1.3rem, 2.1vw, 1.7rem); letter-spacing: -.04em; }
.panel-heading .section-kicker, .section-heading-row .section-kicker { margin-bottom: 4px; }
.privacy-chip { background: var(--mint); border-color: transparent; white-space: nowrap; }
.count-chip { white-space: nowrap; background: var(--yellow-soft); border-color: transparent; }

.input-actions, .adjust-actions, .output-actions { display: flex; flex-wrap: wrap; gap: 9px; margin: 24px 0 20px; }
.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid transparent; border-radius: 11px; padding: 8px 14px; font-size: 14px; font-weight: 800; line-height: 1.25; text-align: center; transition: transform .15s ease, background .15s ease, border-color .15s ease; }
.button:hover:not(:disabled) { transform: translateY(-1px); }
.button-primary { color: var(--ink); background: var(--yellow); border-color: var(--yellow); }
.button-primary:hover:not(:disabled) { background: #ffe071; }
.button-secondary { color: var(--indigo); background: #fff; border-color: #afb2c8; }
.button-secondary:hover:not(:disabled) { background: #f0f1ff; }
.button-quiet { color: var(--ink-soft); background: #f1f1f5; border-color: transparent; }
.button-quiet:hover:not(:disabled) { background: #e5e6ee; }
.file-button { user-select: none; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.field { min-width: 0; }
.field-label { display: block; margin-bottom: 7px; color: var(--ink-soft); font-size: 13px; font-weight: 800; }
.control, textarea { width: 100%; min-width: 0; border: 1px solid #c7c8d6; border-radius: 10px; color: var(--ink); background: #fff; }
.control { min-height: 44px; padding: 8px 11px; font-size: 16px; }
textarea { display: block; min-height: 140px; padding: 13px; resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 14px; line-height: 1.6; }
textarea[readonly] { background: #f5f5fa; }
.field-help, .muted-note, .input-meta { color: #6d708b; font-size: 12px; }
.field-help { display: block; margin-top: 6px; }
.input-meta { display: flex; justify-content: space-between; gap: 8px; margin-top: 8px; }
.control-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 18px; }
.control-grid > .field:first-child:last-child { grid-column: 1 / -1; }
.linear-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.adjust-actions { margin-top: 25px; margin-bottom: 0; }

.message-stack, .diagnostics { display: grid; gap: 7px; margin-top: 16px; }
.message { border-radius: 9px; padding: 9px 11px; font-size: 13px; line-height: 1.5; }
.message-error { color: var(--red); background: #fff0f2; border: 1px solid #f0c8d0; }
.message-warning { color: var(--orange); background: #fff7dd; border: 1px solid #eedb99; }
.message-ok { color: #1f6843; background: #edf9f1; border: 1px solid #bde4ca; }

.compare { padding: 85px 0 65px; }
.section-heading-row { align-items: end; margin-bottom: 20px; }
.diagnostics-summary { max-width: 50%; color: var(--ink-soft); font-size: 13px; text-align: right; }
.compare-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.cue-card { overflow: hidden; box-shadow: none; }
.cue-card-after { border-color: #dad08b; background: #fffef4; }
.cue-card-heading { align-items: center; padding: 17px 19px; border-bottom: 1px solid var(--line); }
.cue-card-heading h3 { margin: 0; font-size: 14px; }
.cue-card-heading span { color: var(--ink-soft); font-size: 12px; }
.cue-list { min-height: 186px; max-height: 390px; overflow: auto; padding: 11px; }
.cue-list.empty-state { display: grid; place-items: center; color: #777a93; font-size: 13px; }
.cue-row { display: grid; grid-template-columns: 42px minmax(0, 1fr); gap: 10px; padding: 10px 8px; border-bottom: 1px solid #ececf2; }
.cue-row:last-child { border-bottom: 0; }
.cue-number { color: var(--indigo); font: 700 12px/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.cue-time { color: var(--ink-soft); font: 700 11px/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; word-break: break-all; }
.cue-text { margin-top: 3px; color: var(--ink); font-size: 13px; white-space: pre-wrap; overflow-wrap: anywhere; }
.truncated-note { margin: 8px 8px 0; color: #777a93; font-size: 12px; }

.output-preview { padding-bottom: 82px; align-items: start; }
.format-picker { display: flex; align-items: center; gap: 7px; color: var(--ink-soft); font-size: 12px; font-weight: 800; }
.control-inline { width: auto; min-width: 100px; }
.output-actions { margin-bottom: 0; }
.muted-note { margin: 13px 0 0; line-height: 1.6; }
.video-file-button { width: 100%; margin: 19px 0 13px; }
video { display: block; width: 100%; max-height: 340px; border-radius: 11px; background: var(--indigo-deep); }
.site-footer { display: flex; justify-content: space-between; gap: 20px; padding: 23px 0 36px; border-top: 1px solid var(--line); color: #6d708b; font-size: 12px; }
.site-footer p { margin: 0; }
.site-footer strong { color: var(--ink); }

[hidden] { display: none !important; }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; gap: 30px; padding-top: 42px; }
  .hero-art { max-width: 640px; margin-inline: auto; }
  .workspace, .output-preview, .compare-grid { grid-template-columns: 1fr; }
  .compare { padding-top: 58px; }
}

@media (max-width: 560px) {
  .page-width, .site-header { width: min(100% - 24px, 1180px); }
  .site-header { height: 62px; }
  .header-note { display: none; }
  .hero { padding: 35px 0 45px; gap: 23px; }
  .hero h1 { font-size: clamp(2.25rem, 14vw, 3.6rem); }
  .hero-lead { margin-top: 19px; font-size: 15px; }
  .hero-art { padding: 7px; border-radius: 16px; }
  .hero-art figcaption { padding-top: 6px; font-size: 11px; }
  .panel { padding: 19px 15px; border-radius: 15px; }
  textarea { font-size: 16px; }
  .panel-heading { gap: 8px; }
  .input-actions .button, .adjust-actions .button, .output-actions .button { flex: 1 1 calc(50% - 9px); }
  .control-grid, .linear-grid { grid-template-columns: 1fr; }
  .control-grid > .field:first-child:last-child { grid-column: auto; }
  .section-heading-row { align-items: start; flex-direction: column; }
  .diagnostics-summary { max-width: none; text-align: left; }
  .compare { padding: 49px 0 50px; }
  .output-preview { padding-bottom: 55px; }
  .site-footer { flex-direction: column; gap: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .button:hover:not(:disabled) { transform: none; }
}