:root {
  /* テーマ: ウォーム・プラム（生成り＋葡萄／明朝見出し・編集デザイン寄り） */
  --bg: #f5f1ea;
  --panel: #fcfaf5;
  --panel-2: #efe9e1;
  --line: #e6dfd5;
  --text: #1f1b17;
  --text-dim: #6f675d;
  --accent: #6e5a7a;
  --accent-hover: #5d4a69;
  --danger: #b3503f;
  --on-accent: #ffffff;
  --brand-font: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", Georgia, serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.6;
}

/* ---------- Site header (nav) ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(250, 248, 243, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
}
.site-brand {
  font-family: var(--brand-font);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}
.site-brand:hover { color: var(--accent); }
.site-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.site-nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  padding: 6px 10px;
  border-radius: 6px;
  transition: background 0.12s, color 0.12s;
}
.site-nav a:hover { color: var(--text); background: var(--panel-2); }
.site-nav a.is-current { color: var(--accent); }

/* ---------- Generic content page ---------- */
.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}
.page h1 {
  font-family: var(--brand-font);
  font-size: 1.6rem;
  margin: 0 0 8px;
}
.page h2 {
  font-family: var(--brand-font);
  font-size: 1.2rem;
  color: var(--accent);
  margin: 28px 0 10px;
}
.page p, .page li { color: var(--text-dim); }
.page a { color: var(--accent); }
.page .updated { font-size: 0.82rem; color: var(--text-dim); margin-top: 0; }
.page ul, .page ol { padding-left: 1.4em; }
.page li { margin: 6px 0; }

/* 埋め込みGoogleフォーム */
.form-embed {
  margin-top: 20px;
  background: #fff;
  border: none;
  border-radius: 12px;
  overflow: hidden;
}
.form-embed iframe {
  display: block;
  width: 100%;
  height: 760px;
  border: 0;
}

.app-header {
  text-align: center;
  padding: 24px 16px 8px;
}
.app-title {
  font-family: var(--brand-font);
  margin: 0;
  font-size: 1.5rem;
  letter-spacing: 0.02em;
}
.app-sub {
  margin: 6px 0 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}
.app-sub strong { color: var(--accent); }

.privacy-badge {
  display: inline-block;
  margin: 12px auto 0;
  padding: 6px 14px;
  border: none;
  background: rgba(110, 90, 122, 0.10);
  color: #574765;
  border-radius: 5px;
  font-size: 0.82rem;
}
.privacy-badge strong { color: #463956; }

.dropzone-note {
  color: var(--accent);
  font-size: 0.82rem;
  margin: 10px 0 0;
}
.footer-privacy {
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 6px;
}

.app-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px;
}

.hidden { display: none !important; }

/* ---------- Dropzone ---------- */
.dropzone {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 340px;
  border: 2px dashed var(--line);
  border-radius: 16px;
  background: var(--panel);
  padding: 48px 16px;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone.dragover {
  border-color: var(--accent);
  background: var(--panel-2);
}
.dropzone-inner { text-align: center; }
.dropzone-icon { font-size: 3rem; margin: 0; }
.dropzone-text { font-size: 1.1rem; margin: 8px 0 0; }
.dropzone-or { color: var(--text-dim); margin: 8px 0; }
.dropzone-hint { color: var(--text-dim); font-size: 0.85rem; margin: 16px 0 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-2);
  color: var(--text);
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, opacity 0.12s;
}
.btn:hover { background: var(--line); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

/* ---------- Toolbar ---------- */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 20px;
  padding: 16px;
  background: var(--panel);
  border: none;
  border-radius: 14px;
  margin-bottom: 16px;
}
.tool-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.tool-label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}
/* キャンバス下の操作ボタン枠 */
.actionbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
  padding: 12px 16px;
  background: var(--panel);
  border: none;
  border-radius: 14px;
}
.action-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.format-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.format-group .tool-label { font-size: 0.72rem; }
/* PNG/JPEG をダウンロードボタンと同じ高さに揃える */
.format-seg .seg-btn { padding: 9px 16px; }
.format-note {
  flex-basis: 100%;
  width: 100%;
  margin: 4px 0 0;
  color: var(--text-dim);
  font-size: 0.78rem;
}

.segmented {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}
.seg-btn {
  padding: 8px 18px;
  border: none;
  background: var(--panel-2);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.9rem;
}
.seg-btn.is-active {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

input[type="range"] {
  width: 180px;
  accent-color: var(--accent);
}

.stamp-palette {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  max-width: 280px;
}
.stamp-btn {
  font-size: 1.25rem;
  line-height: 1;
  padding: 4px 6px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}
.stamp-btn.is-active {
  border-color: var(--accent);
  background: rgba(110, 90, 122, 0.15);
}

/* ---------- Canvas ---------- */
.canvas-wrap {
  display: flex;
  justify-content: center;
}
.canvas-stage {
  /* checkerboard to reveal transparency */
  background-color: #ece9ea;
  background-image:
    linear-gradient(45deg, #ddd6d9 25%, transparent 25%),
    linear-gradient(-45deg, #ddd6d9 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #ddd6d9 75%),
    linear-gradient(-45deg, transparent 75%, #ddd6d9 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  border-radius: 12px;
  border: none;
  padding: 8px;
  max-width: 100%;
  line-height: 0;
  position: relative;
  transition: box-shadow 0.15s;
}
.canvas-stage.dragover {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(110, 90, 122, 0.3);
}
#canvas {
  max-width: 100%;
  max-height: 70vh;
  touch-action: none;
  cursor: crosshair;
  border-radius: 4px;
}

/* ---------- EXIF panel ---------- */
.exif-panel {
  margin-top: 16px;
  padding: 16px 20px;
  background: var(--panel);
  border: none;
  border-radius: 14px;
}
.exif-title {
  font-family: var(--brand-font);
  margin: 0 0 12px;
  font-size: 1.1rem;
  color: var(--accent);
}
.exif-warn {
  margin-bottom: 14px;
  padding: 10px 14px;
  border: 1px solid #d9a441;
  background: rgba(217, 164, 65, 0.16);
  color: #875611;
  border-radius: 10px;
  font-size: 0.9rem;
}
.exif-warn strong { color: #6e4708; }
.exif-body {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.exif-group-title {
  margin: 0 0 6px;
  font-size: 0.85rem;
  color: var(--text);
  border-bottom: 1px solid var(--line);
  padding-bottom: 4px;
}
.exif-list {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  font-size: 0.85rem;
}
.exif-list dt { color: var(--text-dim); white-space: nowrap; }
.exif-list dd { margin: 0; color: var(--text); word-break: break-word; }
.exif-empty { margin: 0; color: var(--text-dim); font-size: 0.9rem; }
.exif-map { grid-column: 1 / -1; margin: 4px 0 0; }
.exif-map a { color: var(--accent); font-size: 0.9rem; }
.exif-note {
  margin: 14px 0 0;
  color: var(--accent);
  font-size: 0.82rem;
}

/* ---------- Info section ---------- */
.info {
  max-width: 880px;
  margin: 32px auto 0;
  padding: 0 16px;
  display: grid;
  gap: 20px;
}
.info-block {
  background: var(--panel);
  border: none;
  border-radius: 14px;
  padding: 20px 24px;
}
.info-title {
  font-family: var(--brand-font);
  margin: 0 0 12px;
  font-size: 1.15rem;
  color: var(--accent);
}
.info-steps, .info-uses {
  margin: 0;
  padding-left: 1.3em;
  color: var(--text-dim);
}
.info-steps li, .info-uses li { margin: 6px 0; }
.info-steps strong, .info-uses strong { color: var(--text); }
.info-block p { margin: 0; color: var(--text-dim); }
.info-block p strong { color: var(--text); }

/* ---------- Footer ---------- */
.app-footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  padding: 24px 16px 24px;
}

/* サイト共通フッター */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--panel);
  margin-top: 32px;
}
.site-footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 20px;
}
.footer-nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.85rem;
}
.footer-nav a:hover { color: var(--accent); }
.footer-credit {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.8rem;
}

/* ---------- スマートフォン対応 ---------- */
@media (max-width: 640px) {
  .app-main { padding: 12px; }
  .app-header { padding: 16px 12px 4px; }
  .app-title { font-size: 1.3rem; }
  .app-sub { font-size: 0.85rem; }

  /* ツールバー: 各設定を縦に積む */
  .toolbar { gap: 14px; padding: 12px; }
  .tool-group { width: 100%; }

  /* セグメントを折り返すチップ状にして、画面幅に収める */
  .segmented {
    width: 100%;
    flex-wrap: wrap;
    gap: 6px;
    border: none;
    overflow: visible;
  }
  .segmented .seg-btn {
    flex: 1 1 auto;
    min-width: 0;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px 8px;
    font-size: 0.82rem;
  }
  .segmented .seg-btn.is-active { border-color: var(--accent); }

  input[type="range"] { width: 100%; }
  .stamp-palette { max-width: none; }

  /* アクションバー: 縦積み＋押しやすいサイズ */
  .actionbar { flex-direction: column; align-items: stretch; gap: 10px; padding: 12px; }
  .action-group { width: 100%; justify-content: center; }
  .action-group .btn { flex: 1 1 auto; }
  #qualityGroup { width: 100%; }
  #quality { width: 100%; }
  #downloadBtn { flex: 1 1 100%; }

  /* 各種パネルの内側余白を控えめに */
  .exif-panel { padding: 14px; }
  .exif-body { grid-template-columns: 1fr; }
  .info { padding: 0 12px; }
  .info-block { padding: 16px; }
  .page { padding: 24px 16px 40px; }
}