:root {
    --bg-dark: #0f0f0f;
    --card-bg: #1e1e1e;
    --accent: #ff0000;
    --text: #ffffff;
}

body { font-family: 'Inter', sans-serif; background: var(--bg-dark); color: var(--text); margin: 0; display: flex; }
.auth-body { justify-content: center; align-items: center; height: 100vh; }

.sidebar { width: 250px; background: #000; height: 100vh; padding: 20px; position: fixed; }
.content { margin-left: 290px; padding: 40px; width: 100%; }

.tab-btn { width: 100%; padding: 15px; background: none; border: none; color: #aaa; text-align: left; cursor: pointer; font-size: 16px; }
.tab-btn.active { color: #fff; border-left: 3px solid var(--accent); }

.card { background: var(--card-bg); padding: 25px; border-radius: 12px; margin-top: 20px; }
input, textarea { width: 100%; padding: 12px; margin-bottom: 15px; background: #333; border: 1px solid #444; color: #fff; border-radius: 6px; }

.tab-content { display: none; }
.tab-content.active { display: block; }

.btn-primary, .btn-generate { background: var(--accent); color: white; border: none; padding: 12px 25px; border-radius: 6px; cursor: pointer; font-weight: bold; }