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

:root {
  --bg: #0f1419;
  --bg-card: #192734;
  --fg: #e7e9ea;
  --fg-muted: #8b98a5;
  --accent: #1d9bf0;
  --accent-hover: #1a8cd8;
  --error: #f4212e;
  --radius: 12px;
}

body {
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
}

.logo { font-size: 18px; color: var(--fg-muted); }
.logo b { color: var(--accent); }

.lang-switch { display: flex; gap: 4px; }

.lang-btn {
  background: none;
  border: 1px solid var(--fg-muted);
  color: var(--fg-muted);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 13px;
}

.lang-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

main {
  flex: 1;
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 16px;
  text-align: center;
}

h1 { font-size: 28px; margin-bottom: 32px; line-height: 1.3; }

#dl-form { display: flex; gap: 8px; margin-bottom: 32px; }

#url-input {
  flex: 1;
  padding: 14px 16px;
  font-size: 16px;
  border: 1px solid var(--fg-muted);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--fg);
  outline: none;
}

#url-input:focus { border-color: var(--accent); }

#fetch-btn {
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

#fetch-btn:hover { background: var(--accent-hover); }

.status { color: var(--fg-muted); }
.error { color: var(--error); }

.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
  text-align: left;
}

.thumb { width: 100%; max-height: 340px; object-fit: cover; display: block; }

.card-body { padding: 16px; }

.author { font-weight: 600; margin-bottom: 4px; }
.tweet-text { color: var(--fg-muted); font-size: 14px; margin-bottom: 12px; }
.video-label { font-size: 13px; color: var(--fg-muted); margin-bottom: 8px; }

.formats { display: flex; flex-wrap: wrap; gap: 8px; }

.dl-btn {
  display: inline-block;
  padding: 10px 18px;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.dl-btn:hover { background: var(--accent-hover); }

.site-footer {
  padding: 24px 16px;
  text-align: center;
  color: var(--fg-muted);
  font-size: 12px;
  max-width: 640px;
  margin: 0 auto;
}

@media (max-width: 480px) {
  #dl-form { flex-direction: column; }
  h1 { font-size: 22px; }
}