*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background: #eef1f5;
  color: #222;
}

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 16px 48px;
}

/* ヘッダー */
.header {
  text-align: center;
  margin-bottom: 24px;
}

.header h1 {
  margin: 0 0 8px;
  font-size: 32px;
  letter-spacing: 0.05em;
}

.header .lead {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #555;
}

/* カード（メインコンテンツ） */
.card {
  background: #fff;
  border-radius: 12px;
  padding: 24px 20px 28px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
}
.card_pdf {
  background: #fff;
  border-radius: 12px;
  padding: 5px 20px 28px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
}
/* アップローダー */
.uploader {
  border: 2px dashed #cbd5e1;
  border-radius: 10px;
  padding: 24px 16px;
  text-align: center;
  background: #f8fafc;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.uploader.dragover {
  border-color: #2563eb;
  background: #eff6ff;
}

.uploader-title {
  margin: 0 0 4px;
  font-weight: 600;
}

.uploader-desc {
  margin: 0 0 16px;
  font-size: 14px;
  color: #555;
}

/* ネイティブ input は隠す */
#file-input {
  display: none;
}

.file-info {
  margin-top: 12px;
  font-size: 13px;
  color: #64748b;
}

/* ボタン類 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  font-size: 14px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease, box-shadow 0.15s ease;
}

.btn.primary {
  background: #0f172a;
  color: #fff;
  border-color: #020617;
}

.btn.primary:hover {
  background: #111827;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.35);
}

.btn.accent {
  background: #2563eb;
  color: #fff;
  border-color: #1d4ed8;
  min-width: 140px;
}

.btn.accent:hover {
  background: #1d4ed8;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn:active {
  transform: translateY(1px);
  box-shadow: none;
}

/* 変換オプション */
.options {
  margin-top: 24px;
  border-top: 1px solid #e2e8f0;
  padding-top: 16px;
}

.options h2 {
  margin: 0 0 8px;
  font-size: 16px;
}

.format-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
  font-size: 14px;
}

.format-options span {
  font-weight: 600;
}

.format-options label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.note {
  margin: 8px 0 0;
  font-size: 12px;
  color: #64748b;
}

/* アクション＆ステータス */
.actions {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.status {
  font-size: 13px;
  color: #444;
}

/* フッター */
.footer {
  margin-top: 20px;
  text-align: center;
  font-size: 11px;
  color: #64748b;
}

/* レスポンシブ（スマホ向けに少し余白調整） */
@media (max-width: 640px) {
  .card {
    padding: 20px 14px 22px;
  }

  .header h1 {
    font-size: 24px;
  }
}

/* ===== 共通ヘッダー ===== */

.site-header {
  background: linear-gradient(120deg, #0f172a, #1d4ed8);
  color: #fff;
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.35);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-title {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0.03em;
}

.site-title a {
  color: #fff;
  text-decoration: none;
}

.site-title a:hover {
  opacity: 0.9;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
}

.site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 14px;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease,
    box-shadow 0.15s ease;
}

.site-nav a:hover {
  background: rgba(15, 23, 42, 0.35);
  color: #fff;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.site-nav a[aria-current="page"] {
  background: rgba(15, 23, 42, 0.6);
  color: #fff;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.35);
  font-weight: 600;
}

@media (max-width: 640px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .site-title {
    font-size: 20px;
  }
}
.seo {
  font-size: small;
  color: #666;
  font-weight: normal;
}

body {
  background: #f5f5f7;
}

.pdf-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

.pdf-header {
  text-align: center;
  margin-bottom: 24px;
}

.pdf-header h1 {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.pdf-header p {
  color: #666;
  font-size: 0.9rem;
}

.tool-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  margin-top: 24px;
}

.tool-card {
  border-radius: 14px;
  border: 1px solid #e2e2ea;
  padding: 16px 18px 18px;
  background: #fafafa;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tool-card h2 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.tool-card p {
  font-size: 0.85rem;
  color: #555;
  margin: 0;
}

.dropzone {
  border: 2px dashed #bbb;
  border-radius: 12px;
  padding: 24px 16px;
  text-align: center;
  cursor: pointer;
  background: #fff;
  transition: border-color 0.2s, background-color 0.2s, transform 0.1s;
}

.dropzone.dragover {
  border-color: #0078ff;
  background: #eaf3ff;
  transform: translateY(-1px);
}

.dropzone span.main {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.dropzone span.sub {
  display: block;
  font-size: 0.8rem;
  color: #777;
}

.file-input {
  display: none;
}

.format-select {
  margin-top: 8px;
  font-size: 0.85rem;
}

.format-select select {
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid #ccc;
}

.action-row {
  margin-top: 10px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

button.primary {
  background: #0078ff;
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 7px 18px;
  font-size: 0.85rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

button.primary:disabled {
  opacity: 0.6;
  cursor: default;
}

button.secondary {
  border-radius: 999px;
  border: 1px solid #ccc;
  background: #fff;
  padding: 6px 14px;
  font-size: 0.8rem;
  cursor: pointer;
}

.status {
  margin-top: 8px;
  font-size: 0.8rem;
  color: #555;
  min-height: 1.1em;
}

.status.error {
  color: #d00;
}

.file-list {
  margin-top: 6px;
  font-size: 0.78rem;
  color: #444;
  max-height: 80px;
  overflow-y: auto;
}

.file-list ul {
  padding-left: 16px;
  margin: 0;
}

.file-list li {
  list-style: disc;
  word-break: break-all;
}

.footer-note {
  margin-top: 18px;
  font-size: 0.75rem;
  color: #777;
  text-align: center;
  line-height: 1.6;
}
/* ===== 共通ヘッダー ===== */

.site-header {
  background: linear-gradient(120deg, #0f172a, #1d4ed8);
  color: #fff;
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.35);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-title {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0.03em;
}

.site-title a {
  color: #fff;
  text-decoration: none;
}

.site-title a:hover {
  opacity: 0.9;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
}

.site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 14px;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease,
    box-shadow 0.15s ease;
}

.site-nav a:hover {
  background: rgba(15, 23, 42, 0.35);
  color: #fff;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.site-nav a[aria-current="page"] {
  background: rgba(15, 23, 42, 0.6);
  color: #fff;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.35);
  font-weight: 600;
}

@media (max-width: 640px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .site-title {
    font-size: 20px;
  }
}

.main {
  flex: 1;
  max-width: 960px;
  margin: 24px auto 0px;
  padding: 0 16px 0px;
}

.card-title {
  margin: 0 0 8px;
  font-size: 22px;
  text-align: center;
}