* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #1d9bf0;
  --bg: #000;
  --surface: #16181c;
  --border: #2f3336;
  --text: #e7e9ea;
  --text-secondary: #71767b;
  --success: #00ba7c;
  --like: #f91880;
  --retweet: #00ba7c;
  --reply: #1d9bf0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

header h1 {
  font-size: 18px;
  font-weight: 700;
}

.subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* インストール・通知バナー */
.install-banner,
.push-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.install-banner p,
.push-banner p {
  flex: 1;
}

.install-banner button,
.push-banner button {
  padding: 6px 14px;
  border-radius: 9999px;
  border: none;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.install-banner button:not(.dismiss),
.push-banner button:not(.dismiss) {
  background: var(--primary);
  color: #fff;
}

.dismiss {
  background: transparent !important;
  color: var(--text-secondary) !important;
  font-size: 18px !important;
  padding: 4px 8px !important;
}

.hidden {
  display: none !important;
}

/* バッチ情報 */
.batch-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  font-size: 13px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.refresh-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  font-size: 16px;
  cursor: pointer;
  transition: color 0.2s;
}

.refresh-btn:active {
  color: var(--primary);
}

/* ローディング */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 16px;
  gap: 12px;
  color: var(--text-secondary);
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ツイートカード */
.tweet-list {
  padding: 0;
}

.tweet-card {
  display: block;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}

.tweet-body {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: background 0.15s;
  -webkit-tap-highlight-color: rgba(29, 155, 240, 0.1);
}

.tweet-body:active {
  background: rgba(29, 155, 240, 0.08);
}

.tweet-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.tweet-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--surface);
}

.tweet-author {
  flex: 1;
  min-width: 0;
}

.tweet-display-name {
  font-weight: 700;
  font-size: 15px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tweet-username {
  font-size: 13px;
  color: var(--text-secondary);
}

.tweet-score {
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 9999px;
  white-space: nowrap;
}

/* アクションタイプバッジ */
.action-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 6px;
  margin-bottom: 8px;
}

.action-badges {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
}

.action-reply {
  background: rgba(29, 155, 240, 0.2);
  color: #1d9bf0;
  border: 1px solid rgba(29, 155, 240, 0.4);
}

.action-quote {
  background: rgba(0, 186, 124, 0.2);
  color: #00ba7c;
  border: 1px solid rgba(0, 186, 124, 0.4);
}

/* リプライチャンス理由タグ */
.reason-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}

.reason-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 9999px;
  background: rgba(29, 155, 240, 0.15);
  color: var(--primary);
  white-space: nowrap;
}

.tweet-text {
  font-size: 15px;
  line-height: 1.5;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}

.tweet-metrics {
  display: flex;
  gap: 24px;
  font-size: 13px;
  color: var(--text-secondary);
}

.metric {
  display: flex;
  align-items: center;
  gap: 4px;
}

.metric-reply { color: var(--reply); }
.metric-rt { color: var(--retweet); }
.metric-like { color: var(--like); }

.tweet-time {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* リプライ案エリア */
.suggest-area {
  margin-top: 10px;
}

.suggest-btn {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s;
}

.suggest-btn:active {
  background: rgba(29, 155, 240, 0.1);
}

.suggest-btn:disabled {
  opacity: 0.6;
  cursor: default;
}

.suggest-results {
  margin-top: 8px;
}

.suggest-loading {
  display: flex;
  justify-content: center;
  padding: 16px;
}

.suggest-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 8px;
  position: relative;
}

.suggest-type {
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
  display: block;
}

.suggest-text {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
  padding-right: 50px;
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 11px;
  cursor: pointer;
}

.copy-btn:active {
  background: rgba(29, 155, 240, 0.15);
  color: var(--primary);
}

.suggest-error {
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
  padding: 12px;
}

/* 空の状態 */
.empty-state {
  text-align: center;
  padding: 48px 16px;
  color: var(--text-secondary);
}

.empty-state .hint {
  font-size: 13px;
  margin-top: 8px;
}

/* フッター */
footer {
  text-align: center;
  padding: 16px;
  font-size: 12px;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
}

/* iPhone安全領域対応 */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  footer {
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
  }
}