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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Tahoma', sans-serif;
  background: #15202b;
  color: #e7e9ea;
  min-height: 100vh;
}

/* RTL Support */
[dir="rtl"] .tweet-card .char-count {
  text-align: left;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}

/* Login Page */
.login-card {
  background: #192734;
  border-radius: 16px;
  padding: 48px;
  text-align: center;
  margin-top: 100px;
}

.login-card h1 {
  font-size: 32px;
  margin-bottom: 12px;
}

.login-card p {
  color: #8b98a5;
  margin-bottom: 32px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 9999px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background 0.2s;
}

.btn-primary {
  background: #e7e9ea;
  color: #15202b;
}

.btn-primary:hover {
  background: #d7d9db;
}

.btn-secondary {
  background: transparent;
  color: #e7e9ea;
  border: 1px solid #536471;
}

.btn-secondary:hover {
  background: rgba(239, 243, 244, 0.1);
}

.btn-post {
  background: #1d9bf0;
  color: white;
  width: 100%;
  justify-content: center;
  margin-top: 16px;
}

.btn-post:hover {
  background: #1a8cd8;
}

.btn-post:disabled {
  background: #536471;
  cursor: not-allowed;
}

/* Header */
header {
  border-bottom: 1px solid #38444d;
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.header-content {
  text-align: center;
}

.header-content h1 {
  font-size: 28px;
  margin-bottom: 4px;
}

.subtitle {
  color: #8b98a5;
  font-size: 14px;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

#username {
  color: #8b98a5;
}

/* Main content */
main h2 {
  margin-bottom: 20px;
  font-size: 20px;
}

/* Tweets Grid */
.tweets-grid {
  display: grid;
  gap: 16px;
}

.tweet-card {
  background: #192734;
  border-radius: 16px;
  padding: 20px;
  border: 1px solid #38444d;
}

.tweet-badges {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.tweet-card .category {
  display: inline-block;
  background: #1d9bf0;
  color: white;
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 12px;
}

.tweet-card .reply-badge {
  background: #7856ff;
}

.tweet-card .text {
  font-size: 16px;
  line-height: 1.5;
  margin-bottom: 4px;
}

.tweet-card .char-count {
  color: #8b98a5;
  font-size: 13px;
}

/* Loading & Error states */
.loading {
  text-align: center;
  color: #8b98a5;
  padding: 40px;
}

.error {
  color: #f4212e;
  margin-top: 16px;
}

.empty-state {
  text-align: center;
  color: #8b98a5;
  padding: 60px 20px;
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 500;
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 1000;
}

.toast.show {
  opacity: 1;
}

.toast.success {
  background: #00ba7c;
  color: white;
}

.toast.error {
  background: #f4212e;
  color: white;
}

/* Reply Preview */
.reply-preview {
  background: #15202b;
  border: 1px solid #38444d;
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 12px;
}

.reply-preview .loading-text {
  color: #8b98a5;
  font-size: 13px;
}

.reply-preview .error-text {
  color: #f4212e;
  font-size: 13px;
}

.reply-preview .reply-link {
  color: #1d9bf0;
  text-decoration: none;
  font-size: 13px;
}

.reply-preview .reply-link:hover {
  text-decoration: underline;
}

.original-tweet {
  font-size: 14px;
}

.original-tweet-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}

.original-tweet-header .replying-to {
  color: #8b98a5;
  font-size: 13px;
}

.original-tweet-header .author-link {
  color: #1d9bf0;
  text-decoration: none;
  font-weight: 500;
}

.original-tweet-header .author-link:hover {
  text-decoration: underline;
}

.original-tweet-text {
  color: #8b98a5;
  line-height: 1.4;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}