/* Web Tools - 共通スタイル */

/* CSS変数（カラーテーマ） */
:root {
  --color-bg: #ffffff;
  --color-bg-secondary: #f5f5f5;
  --color-text: #333333;
  --color-text-secondary: #666666;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-border: #e0e0e0;
  --color-success: #22c55e;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --radius: 8px;
  --transition: 0.2s ease;
}

/* ダークモード */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1a1a1a;
    --color-bg-secondary: #2d2d2d;
    --color-text: #e0e0e0;
    --color-text-secondary: #a0a0a0;
    --color-primary: #3b82f6;
    --color-primary-hover: #60a5fa;
    --color-border: #404040;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  }
}

/* リセット */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ベーススタイル */
html {
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

/* レイアウト */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ヘッダー */
.header {
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
}

.header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header__logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-text);
}

.header__logo:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.header__nav {
  display: flex;
  gap: 1.5rem;
}

/* メインコンテンツ */
.main {
  padding: 2rem 0;
}

/* プライバシー説明 */
.privacy-notice {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 0.75rem 0;
  text-align: center;
  color: var(--color-success);
  font-size: 0.8rem;
}

/* フッター */
.footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 2rem 0 1.5rem;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  margin-top: auto;
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  text-align: left;
}

.footer__category {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer__category-title {
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.footer__link {
  color: var(--color-primary);
  font-size: 0.875rem;
  text-decoration: underline;
  transition: color var(--transition), background-color var(--transition);
  padding: 0.125rem 0.25rem;
  margin: -0.125rem -0.25rem;
  border-radius: 4px;
}

.footer__link:hover {
  color: var(--color-primary-hover);
  background-color: rgba(59, 130, 246, 0.1);
  text-decoration: none;
}

.footer__copyright {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.footer__info {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1rem;
  padding-top: 1rem;
}

.footer__info-link {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color var(--transition);
}

.footer__info-link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* ツールカード（トップページ用） */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.tool-card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

.tool-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.tool-card__title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.tool-card__description {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* ツールページ用 */
.tool-header {
  margin-bottom: 1.5rem;
}

.tool-header__title {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.tool-header__description {
  color: var(--color-text-secondary);
}

/* フォーム要素 */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-textarea,
.form-input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition);
}

.form-textarea:focus,
.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-textarea {
  resize: vertical;
  min-height: 150px;
  font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;
}

/* ボタン */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background-color: var(--color-primary);
  color: #ffffff;
}

.btn--primary:hover {
  background-color: var(--color-primary-hover);
}

.btn--secondary {
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover {
  background-color: var(--color-border);
}

.btn-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* メッセージ */
.message {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.message--success {
  background-color: rgba(34, 197, 94, 0.1);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.message--error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  border: 1px solid var(--color-error);
}

/* ユーティリティ */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* レスポンシブ */
@media (max-width: 768px) {
  .header__inner {
    flex-direction: column;
    gap: 1rem;
  }

  .header__nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .btn-group {
    flex-direction: column;
  }

  .btn-group .btn {
    width: 100%;
  }
}