:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --bg: #F9FAFB;
    --card-bg: #FFFFFF;
    --text: #111827;
    --text-light: #6B7280;
    --border: #E5E7EB;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Inter', -apple-system, sans-serif; }
body { background-color: var(--bg); color: var(--text); }

.navbar { display: flex; justify-content: space-between; padding: 1.5rem 5%; background: var(--card-bg); box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.logo { font-size: 1.5rem; font-weight: 700; color: var(--primary); }
.limit-badge { background: #EEF2FF; color: var(--primary); padding: 0.5rem 1rem; border-radius: 20px; font-weight: 600; margin-right: 1rem;}
.btn-login { text-decoration: none; color: var(--text); font-weight: 500; }

.container { padding: 3rem 5%; max-width: 1200px; margin: auto; }
.hero { text-align: center; margin-bottom: 3rem; }
.hero h1 { font-size: 2.5rem; margin-bottom: 0.5rem; }
.hero p { color: var(--text-light); }

.grid-container { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1.5rem; }
.qr-card { background: var(--card-bg); padding: 1.5rem; border-radius: 12px; border: 1px solid var(--border); text-align: center; cursor: pointer; transition: all 0.3s ease; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); }
.qr-card:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); }
.qr-card i { font-size: 2rem; color: var(--primary); margin-bottom: 1rem; }
.qr-card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.qr-card p { font-size: 0.85rem; color: var(--text-light); }

.hidden { display: none !important; }
.generator-section { animation: fadeIn 0.4s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.generator-card { background: var(--card-bg); border-radius: 16px; padding: 2rem; box-shadow: 0 10px 25px rgba(0,0,0,0.05); }
.back-btn { display: inline-block; cursor: pointer; color: var(--text-light); margin-bottom: 1.5rem; font-weight: 500; }
.back-btn:hover { color: var(--primary); }

.split-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; margin-top: 1.5rem; }
@media (max-width: 768px) { .split-layout { grid-template-columns: 1fr; } }

.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 500; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 0.75rem; border: 1px solid var(--border); border-radius: 8px; outline: none; transition: border 0.2s; }
.form-group input:focus, .form-group textarea:focus { border-color: var(--primary); }

.btn-primary, .btn-secondary { display: block; width: 100%; padding: 0.8rem; border: none; border-radius: 8px; font-weight: 600; cursor: pointer; text-align: center; text-decoration: none; transition: 0.2s; }
.btn-primary { background: var(--primary); color: white; margin-top: 1.5rem; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: #E5E7EB; color: var(--text); margin-top: 1rem; }
.btn-secondary:hover { background: #D1D5DB; }

.preview-panel { display: flex; flex-direction: column; align-items: center; justify-content: center; background: #F3F4F6; border-radius: 12px; padding: 2rem; border: 2px dashed var(--border); }
.placeholder { text-align: center; color: var(--text-light); }
.placeholder i { font-size: 4rem; margin-bottom: 1rem; opacity: 0.5; }
.qr-image { max-width: 100%; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); }