* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); min-height: 100vh; padding: 20px; }
.container { max-width: 800px; margin: 0 auto; background: white; border-radius: 20px; padding: 30px; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
h1 { text-align: center; color: #667eea; margin-bottom: 30px; }
.form-group { margin-bottom: 20px; }
label { display: block; margin-bottom: 8px; font-weight: 600; color: #333; }
input, select { width: 100%; padding: 12px; border: 2px solid #e0e0e0; border-radius: 8px; font-size: 16px; }
input:focus, select:focus { outline: none; border-color: #667eea; }
.btn { width: 100%; padding: 15px; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; border: none; border-radius: 8px; font-size: 18px; font-weight: 600; cursor: pointer; margin-top: 20px; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4); }
.resultado { margin-top: 30px; padding: 20px; background: #f8f9fa; border-radius: 8px; display: none; }
.resultado h2 { color: #667eea; margin-bottom: 15px; }
.info { margin: 10px 0; font-size: 16px; }
.info strong { color: #333; }
.parcelas { max-height: 300px; overflow-y: auto; margin-top: 15px; }
.parcela-item { padding: 10px; border-bottom: 1px solid #e0e0e0; font-size: 14px; }

/* Method toggle */
.method-toggle { display: flex; gap: 0; border-radius: 10px; overflow: hidden; border: 2px solid #667eea; }
.method-btn { flex: 1; padding: 12px 8px; text-align: center; cursor: pointer; font-weight: 600; font-size: 14px; transition: all 0.2s; background: white; color: #667eea; border: none; }
.method-btn.active { background: #667eea; color: white; }
.method-btn:hover:not(.active) { background: #f0f0ff; }

/* Comparison box */
.compare-box { margin-top: 20px; padding: 16px; border-radius: 10px; background: linear-gradient(135deg, #f8f9fa, #e8eaf6); border: 1px solid #e0e0e0; }
.compare-box h3 { color: #667eea; margin-bottom: 12px; font-size: 15px; }
.compare-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 4px; font-size: 13px; }
.compare-grid .label { font-weight: 600; color: #555; padding: 6px 0; }
.compare-grid .val { padding: 6px 8px; text-align: center; border-radius: 6px; }
.compare-grid .val.selected { background: #667eea; color: white; font-weight: 700; }
.compare-grid .val.alt { background: #f5f5f5; color: #666; }
.compare-grid .header { font-weight: 700; padding: 6px 8px; text-align: center; font-size: 12px; text-transform: uppercase; color: #888; }

/* Recommendation */
.reco { margin-top: 8px; font-size: 12px; padding: 6px 12px; border-radius: 6px; display: none; }
.reco.flat { background: #fff3e0; color: #e65100; }
.reco.price { background: #e3f2fd; color: #0d47a1; }

/* Dark Mode */
body.dark-mode { background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%); }
body.dark-mode .container { background: #0f0f23; color: #e0e0e0; }
body.dark-mode input, body.dark-mode select, body.dark-mode textarea { background: #16213e; color: #e0e0e0; border-color: #333; }
body.dark-mode .method-btn { background: #16213e; color: #667eea; border-color: #333; }
body.dark-mode .method-btn.active { background: #667eea; color: white; }
body.dark-mode .compare-box { background: #16213e; border-color: #333; }

@media (max-width: 600px) {
    .compare-grid { font-size: 11px; }
    .method-btn { font-size: 12px; padding: 10px 4px; }
}