/* ==========================================
   弔辞・お悔やみ文ジェネレーター
   落ち着いた配色：白・グレー・深い紺・薄い金
   ========================================== */

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

:root {
  --color-navy: #1a2744;
  --color-navy-light: #2c3e6b;
  --color-navy-pale: #e8ecf4;
  --color-gold: #b8965a;
  --color-gold-light: #d4b07a;
  --color-gold-pale: #f5edd8;
  --color-white: #ffffff;
  --color-gray-50: #f8f8f8;
  --color-gray-100: #f0f0f0;
  --color-gray-200: #e0e0e0;
  --color-gray-400: #9e9e9e;
  --color-gray-600: #616161;
  --color-gray-800: #2e2e2e;
  --color-text: #2e2e2e;
  --color-text-light: #5a5a5a;
  --font-serif: 'Yu Mincho', '游明朝', 'YuMincho', 'Hiragino Mincho ProN', 'HGS明朝E', 'MS Mincho', serif;
  --font-sans: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Yu Gothic', 'YuGothic', 'Meiryo', sans-serif;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-gray-50);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --- ヘッダー --- */
.site-header {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
  color: var(--color-white);
  padding: 40px 20px 36px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-gold-light) 50%, var(--color-gold) 100%);
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(184, 150, 90, 0.3);
}

.header-inner {
  max-width: 800px;
  margin: 0 auto;
}

.site-title {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.site-subtitle {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 0.05em;
}

/* --- メインコンテナ --- */
.main-container {
  flex: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 16px 48px;
  width: 100%;
}

/* --- タブナビゲーション --- */
.tab-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.tab-btn {
  flex: 1;
  min-width: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 14px 12px;
  background: var(--color-white);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-light);
  letter-spacing: 0.03em;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}

.tab-btn:hover {
  border-color: var(--color-gold);
  color: var(--color-navy);
  background: var(--color-gold-pale);
}

.tab-btn.active {
  background: var(--color-navy);
  border-color: var(--color-navy);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.tab-btn.active .tab-desc {
  color: rgba(255,255,255,0.65);
}

.tab-icon {
  font-size: 1.2rem;
  line-height: 1;
}

.tab-desc {
  font-size: 0.72rem;
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--color-gray-400);
  letter-spacing: 0;
}

/* --- コンテンツラッパー --- */
.content-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

/* --- フォームセクション --- */
.form-section {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-navy-pale);
  letter-spacing: 0.05em;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

.required {
  display: inline-block;
  font-size: 0.7rem;
  background: var(--color-navy);
  color: var(--color-white);
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 6px;
  vertical-align: middle;
  font-weight: 400;
}

.optional {
  display: inline-block;
  font-size: 0.7rem;
  background: var(--color-gray-200);
  color: var(--color-gray-600);
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 6px;
  vertical-align: middle;
  font-weight: 400;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-navy);
  box-shadow: 0 0 0 3px rgba(26, 39, 68, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-gray-400);
  font-size: 0.88rem;
}

.form-textarea {
  resize: vertical;
  min-height: 90px;
  line-height: 1.6;
}

.char-count {
  display: block;
  text-align: right;
  font-size: 0.75rem;
  color: var(--color-gray-400);
  margin-top: 4px;
}

/* --- ラジオボタン --- */
.radio-group {
  display: flex;
  gap: 20px;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--color-text);
}

.radio-label input[type="radio"] {
  display: none;
}

.radio-custom {
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-gray-400);
  border-radius: 50%;
  position: relative;
  transition: border-color var(--transition);
  flex-shrink: 0;
}

.radio-label input[type="radio"]:checked + .radio-custom {
  border-color: var(--color-navy);
}

.radio-label input[type="radio"]:checked + .radio-custom::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  background: var(--color-navy);
  border-radius: 50%;
}

/* --- パターンボタン --- */
.pattern-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pattern-btn {
  padding: 7px 14px;
  border: 1px solid var(--color-gray-200);
  border-radius: 20px;
  background: var(--color-white);
  font-size: 0.82rem;
  color: var(--color-gray-600);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
}

.pattern-btn:hover {
  border-color: var(--color-gold);
  color: var(--color-navy);
  background: var(--color-gold-pale);
}

.pattern-btn.active {
  border-color: var(--color-navy);
  background: var(--color-navy);
  color: var(--color-white);
}

/* --- 生成ボタン --- */
.generate-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: var(--shadow-md);
  margin-top: 8px;
  position: relative;
  overflow: hidden;
}

.generate-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(184, 150, 90, 0.5);
}

.generate-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(26, 39, 68, 0.3);
}

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

/* --- 出力セクション --- */
.output-section {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  position: sticky;
  top: 20px;
}

.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}

.output-header .section-title {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.output-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.char-display {
  font-size: 0.8rem;
  color: var(--color-gray-400);
}

.copy-btn {
  padding: 6px 18px;
  background: var(--color-gold-pale);
  border: 1px solid var(--color-gold);
  border-radius: 20px;
  font-size: 0.82rem;
  color: var(--color-navy);
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition);
  letter-spacing: 0.05em;
}

.copy-btn:hover {
  background: var(--color-gold);
  color: var(--color-white);
  border-color: var(--color-gold);
}

.output-box {
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: 20px;
  min-height: 200px;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  line-height: 2;
  color: var(--color-text);
  white-space: pre-wrap;
  word-break: break-all;
}

.output-placeholder {
  color: var(--color-gray-400);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  line-height: 1.7;
}

.copy-notice {
  font-size: 0.82rem;
  color: var(--color-gold);
  text-align: center;
  height: 20px;
  margin-top: 8px;
  font-weight: 600;
  transition: opacity var(--transition);
}

/* --- ご利用にあたって --- */
.usage-note {
  margin-top: 20px;
  padding: 16px;
  background: var(--color-navy-pale);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-navy);
}

.usage-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.usage-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.usage-list li {
  font-size: 0.8rem;
  color: var(--color-gray-600);
  padding-left: 16px;
  position: relative;
  line-height: 1.6;
}

.usage-list li::before {
  content: '・';
  position: absolute;
  left: 0;
  color: var(--color-navy);
}

/* --- フッター --- */
.site-footer {
  background: var(--color-navy);
  color: rgba(255,255,255,0.6);
  text-align: center;
  padding: 24px 20px;
  margin-top: auto;
}

.footer-inner {
  max-width: 800px;
  margin: 0 auto;
}

.footer-text {
  font-size: 0.82rem;
  margin-bottom: 4px;
}

.footer-link {
  color: var(--color-gold-light);
  text-decoration: none;
}

.footer-link:hover {
  text-decoration: underline;
}

.footer-copy {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
}

/* ==========================================
   レスポンシブ
   ========================================== */
@media (max-width: 768px) {
  .main-container {
    padding: 20px 12px 40px;
  }

  .content-wrapper {
    grid-template-columns: 1fr;
  }

  .output-section {
    position: static;
  }

  .tab-nav {
    gap: 6px;
  }

  .tab-btn {
    min-width: 90px;
    padding: 10px 8px;
    font-size: 0.85rem;
  }

  .tab-icon {
    font-size: 1rem;
  }

  .site-title {
    font-size: 1.3rem;
  }

  .form-section,
  .output-section {
    padding: 20px 16px;
  }

  .output-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .output-header .section-title {
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-navy-pale);
    width: 100%;
  }
}

@media (max-width: 400px) {
  .tab-nav {
    flex-direction: column;
  }

  .tab-btn {
    flex-direction: row;
    justify-content: center;
    padding: 10px 12px;
  }

  .tab-desc {
    margin-left: 4px;
  }
}