:root {
  --color-bg: #f6f7f8;
  --color-surface: #ffffff;
  --color-border: #dde2e7;
  --color-border-hover: #b8c2cc;
  --color-text: #14202b;
  --color-text-secondary: #51606e;
  --color-accent: #0d9488;
  --color-accent-hover: #0f766e;
  --color-accent-muted: rgba(13, 148, 136, 0.08);
  --color-danger: #dc2626;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
header { background: linear-gradient(135deg, #0f2027 0%, #2c5364 100%); }
.header-inner { max-width: 1180px; margin: 0 auto; padding: 24px; text-align: center; }
header h1 { font-size: clamp(1.35rem, 1.1rem + 1vw, 1.7rem); font-weight: 700; letter-spacing: -0.02em; color: #fff; }
header h1 .accent { color: #5eead4; }
header p { font-size: 1rem; color: rgba(255,255,255,0.75); margin-top: 4px; }
.header-privacy {
  display: inline-block; margin-top: 12px; padding: 4px 14px;
  border: 1px solid rgba(94,234,212,0.35); border-radius: 999px;
  color: #5eead4; font-size: 1rem;
}
.container { max-width: 1180px; margin: 0 auto; padding: 24px 24px 160px; }

.note {
  background: #f0fdfa; border: 1px solid #99f6e4; border-radius: 10px;
  padding: 14px 18px; margin-bottom: 20px; color: #115e59;
}
.note strong { font-weight: 700; }

/* ドロップゾーン */
.dropzone {
  border: 2px dashed var(--color-border-hover); border-radius: 14px;
  background: var(--color-surface); padding: clamp(32px, 6vw, 64px) 24px;
  text-align: center; cursor: pointer; transition: border-color .2s, background .2s;
}
.dropzone:hover, .dropzone.is-over { border-color: var(--color-accent); background: var(--color-accent-muted); }
.dropzone h2 { font-size: 1.15rem; font-weight: 700; margin-bottom: 6px; }
.dropzone p { color: var(--color-text-secondary); font-size: 1rem; }

.samples {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
  margin: 16px 0 20px; font-size: 1rem;
}
.samples-label { color: var(--color-text-secondary); }
.samples-credit { color: var(--color-text-secondary); }
.samples-credit a { color: var(--color-accent); }
.sample-btn {
  display: flex; align-items: center; gap: 8px; font: inherit; font-size: 1rem;
  padding: 6px 14px 6px 6px; border: 1px solid var(--color-border);
  border-radius: 10px; background: #fff; color: var(--color-text); cursor: pointer;
}
.sample-btn:hover { border-color: var(--color-accent); background: var(--color-accent-muted); }
.sample-btn img { display: block; border-radius: 6px; }

/* 操作パネル */
.panel {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 14px; padding: 20px; margin-bottom: 20px;
}
.panel h2 { font-size: 1.05rem; font-weight: 700; margin-bottom: 14px; }
.field { margin-bottom: 18px; }
.field:last-child { margin-bottom: 0; }
.field > label, .field > span.label {
  display: block; font-weight: 500; margin-bottom: 8px; font-size: 1rem;
}
.field .hint { color: var(--color-text-secondary); font-size: 1rem; font-weight: 400; }

.seg { display: flex; flex-wrap: wrap; gap: 8px; }
.seg button {
  font: inherit; font-size: 1rem; padding: 8px 18px; border-radius: 999px;
  border: 1px solid var(--color-border); background: #fff; color: var(--color-text);
  cursor: pointer; transition: all .15s;
}
.seg button:hover { border-color: var(--color-border-hover); }
.seg button.is-active { background: var(--color-accent); border-color: var(--color-accent); color: #fff; font-weight: 500; }

.slider-row { display: flex; align-items: center; gap: 14px; }
.slider-row input[type=range] { flex: 1; accent-color: var(--color-accent); min-width: 0; }
.slider-row output {
  min-width: 64px; text-align: right; font-variant-numeric: tabular-nums;
  color: var(--color-text-secondary); font-size: 1rem;
}

.grid2 { display: grid; grid-template-columns: 1fr; gap: 18px; }
@media (min-width: 780px) { .grid2 { grid-template-columns: 1fr 1fr; gap: 28px; } }

.btn-run {
  font: inherit; font-size: 1.05rem; font-weight: 700; width: 100%;
  padding: 14px 24px; border: none; border-radius: 10px;
  background: var(--color-accent); color: #fff; cursor: pointer; transition: background .2s;
}
.btn-run:hover:not(:disabled) { background: var(--color-accent-hover); }
.btn-run:disabled { background: #94a3b8; cursor: not-allowed; }

.field-note { font-size: 1rem; color: var(--color-text-secondary); margin-top: 4px; min-height: 1.7em; }
.field-note.warn { color: #b45309; }

.adv { margin-top: 18px; border-top: 1px solid var(--color-border); padding-top: 14px; }
.adv summary { cursor: pointer; font-size: 1rem; color: var(--color-text-secondary); }
.adv summary:hover { color: var(--color-accent); }

.meta-line { color: var(--color-text-secondary); font-size: 1rem; margin-top: 12px; }
.meta-line .warn { color: var(--color-danger); }

/* 進捗 */
.progress-wrap { margin-top: 14px; }
.progress-bar { height: 8px; border-radius: 999px; background: #e2e8f0; overflow: hidden; }
.progress-bar > i { display: block; height: 100%; width: 0; background: var(--color-accent); transition: width .12s linear; }
.progress-label { font-size: 1rem; color: var(--color-text-secondary); margin-top: 6px; }

/* 比較ビュー */
.compare-head {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 12px; margin-bottom: 12px;
}
.compare-legend { display: flex; gap: 18px; flex-wrap: wrap; font-size: 1rem; color: var(--color-text-secondary); }
.compare-legend b { color: var(--color-text); font-weight: 500; }
.viewport {
  position: relative; width: 100%; height: min(62vh, 620px);
  background: #1e293b; border-radius: 12px; overflow: hidden;
  cursor: grab; touch-action: none;
}
.viewport.is-grabbing { cursor: grabbing; }
.viewport canvas { display: block; width: 100%; height: 100%; }
.viewport .tag {
  position: absolute; top: 12px; padding: 4px 12px; border-radius: 999px;
  background: rgba(15,23,42,0.78); color: #fff; font-size: 1rem; pointer-events: none;
}
.viewport .tag.l { left: 12px; }
.viewport .tag.r { right: 12px; }
/* 仕切りハンドル（GSAP Draggableで動かす） */
.cp-handle {
  position: absolute; top: 0; bottom: 0; left: 0; width: 2px;
  background: rgba(255,255,255,0.95); cursor: ew-resize; touch-action: none;
}
.cp-grip {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 40px; height: 40px; border-radius: 50%; background: #fff; color: #0f172a;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; box-shadow: 0 2px 10px rgba(0,0,0,0.4);
}
.viewport-hint {
  font-size: 1rem; color: var(--color-text-secondary); margin-top: 10px;
}

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.actions button {
  font: inherit; font-size: 1rem; padding: 12px 22px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--color-border); background: #fff; color: var(--color-text);
}
.actions button:hover { border-color: var(--color-border-hover); }
.actions button.primary { background: var(--color-accent); border-color: var(--color-accent); color: #fff; font-weight: 500; }
.actions button.primary:hover { background: var(--color-accent-hover); }

/* ===== フッター =====
   右下固定広告と重ならないよう、リンクは左寄せで並べる（ad-units.md 2026-07-24 改定） */
footer {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  padding: 24px 40px;
  color: #64748b;
  font-size: 1rem;
  border-top: 1px solid #e2e8f0;
  background: #fff;
}
footer a { color: #1e293b; text-decoration: none; transition: color 0.2s; }
footer a:hover { color: #3b82f6; }
.footer-links { display: flex; gap: 16px; }
.footer-links a {
  border: 1px solid #e2e8f0;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 1rem;
  transition: all 0.2s;
}
.footer-links a:hover { border-color: #3b82f6; color: #3b82f6; }

@media (max-width: 768px) {
  footer { flex-direction: column; gap: 16px; padding: 24px 16px; text-align: center; }
  .footer-links { flex-wrap: wrap; justify-content: center; }
}

/* ===== 広告（右下フローティングカード / ad-units.md 準拠 320×100） ===== */
.footer-ad {
  position: fixed; right: 0; bottom: 0; z-index: 90;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 0;
  width: 320px; overflow: hidden;
  background: transparent; border: none; box-shadow: none;
}
.footer-ad.is-closed { display: none; }
.ad-widget__head {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; position: relative; z-index: 1;
}
.ad-widget__label {
  color: #64748b; font-size: 12px; letter-spacing: 0.04em;
  background: #f1f5f9; padding: 2px 8px; border-radius: 999px;
}
.ad-widget__close {
  appearance: none; border: none; background: #f1f5f9; color: #64748b;
  width: 18px; height: 18px; border-radius: 50%; font-size: 12px; line-height: 1;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background 0.2s, color 0.2s;
}
.ad-widget__close:hover { background: #e2e8f0; color: #1e293b; }
.footer-ad ins.adsbygoogle { display: block; width: 320px; height: 100px; }

@media screen and (max-width: 768px) {
  .footer-ad {
    position: static; align-self: center; margin: 24px auto 0;
    gap: 0; padding: 0; background: none; border: none; border-radius: 0;
    box-shadow: none; z-index: auto;
  }
  .footer-ad.is-closed { display: flex; }
  .ad-widget__head { display: none; }
  .footer-ad ins.adsbygoogle { width: 320px; height: 100px; }
}

/* ===== 言語切替（ヘッダー右上） ===== */
.header-inner { position: relative; }
.lang-switch {
  position: absolute; top: 0; right: 0;
  display: inline-block; padding: 4px 12px;
  border: 1px solid rgba(94, 234, 212, 0.4);
  border-radius: 999px; color: #5eead4;
  font-size: 1rem; text-decoration: none;
}
.lang-switch:hover { background: rgba(94, 234, 212, 0.12); }

/* ===== 使い方ページ ===== */
.prose { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 14px; padding: clamp(20px, 4vw, 36px); }
.prose h2 { font-size: 1.25rem; font-weight: 700; margin: 32px 0 12px; letter-spacing: -0.01em; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 1.05rem; font-weight: 700; margin: 24px 0 8px; }
.prose p { margin-bottom: 14px; }
.prose ul, .prose ol { margin: 0 0 16px 1.4em; }
.prose li { margin-bottom: 6px; }
.prose a { color: var(--color-accent); }
.prose table { width: 100%; border-collapse: collapse; margin-bottom: 18px; }
.prose th, .prose td { border: 1px solid var(--color-border); padding: 10px 12px; text-align: left; }
.prose th { background: var(--color-accent-muted); font-weight: 700; }
.prose .lead { font-size: 1.05rem; font-weight: 500; }
.table-scroll { overflow-x: auto; }
.back-link { display: inline-block; margin-top: 24px; color: var(--color-accent); text-decoration: none; }
.back-link:hover { text-decoration: underline; }

/* ===== AIモード ===== */
.seg button:disabled { opacity: 0.4; cursor: not-allowed; }
.seg button:disabled:hover { border-color: var(--color-border); }
.ai-note { font-size: 1rem; color: var(--color-text-secondary); margin-top: 8px; }
/* AIモードでは非AI専用のつまみを隠す（モデルが固定処理のため効かない） */
body.is-ai-mode .standard-only { display: none; }

/* ===== 保存形式 =====
   隣のボタン（.actions button）と同じ高さ・角丸・枠線にそろえ、ラベルは枠の内側に収める */
.dl-format {
  display: inline-flex; align-items: center; height: 100%;
  border: 1px solid var(--color-border); border-radius: 10px; background: #fff;
  padding-left: 14px; font-size: 1rem; transition: border-color .15s;
}
.dl-format:hover { border-color: var(--color-border-hover); }
.dl-format:focus-within { border-color: var(--color-accent); }
.dl-format span { color: var(--color-text-secondary); white-space: nowrap; }
.dl-format select {
  font: inherit; font-size: 1rem; font-weight: 500; color: var(--color-text);
  height: 100%; padding: 12px 36px 12px 10px; border: none; border-radius: 0 10px 10px 0;
  background: transparent url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%2351606e' stroke-width='1.6'/%3E%3C/svg%3E") no-repeat right 14px center;
  cursor: pointer; appearance: none; -webkit-appearance: none; outline: none;
}
.actions { align-items: stretch; }
.actions button:disabled { opacity: 0.6; cursor: wait; }