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

:root {
    --bg: #000000;
    --text: #ffffff;
    --text-muted: #666666;
    --accent: #ffffff;
    --card-bg: #111111;
    --border: #222222;
}

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

header {
    text-align: center;
    padding: 4rem 1rem 2rem;
    border-bottom: 1px solid var(--border);
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.subtitle a {
    color: var(--text);
    text-decoration: underline;
}

main {
    max-width: 550px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

#tweets-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tweet-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.twitter-tweet {
    margin: 0 !important;
}

.loading {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

.end-message {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
    font-style: italic;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

footer {
    text-align: center;
    padding: 2rem 1rem 4rem;
    color: var(--text-muted);
    font-size: 0.8rem;
}

footer a {
    color: var(--text-muted);
}

@media (max-width: 640px) {
    header { padding: 2rem 1rem 1.5rem; }
    main { padding: 1rem; }
}