.form-section{flex:1;background:var(--bg-white);display:flex;align-items:center;justify-content:center;padding:var(--spacing-2xl);position:relative;}.form-container{width:100%;max-width:450px;animation:slideInRight 0.8s ease-out;}.back-to-home{position:absolute;top:var(--spacing-xl);left:var(--spacing-xl);}.back-btn{display:inline-flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);color:var(--text-muted);text-decoration:none;border-radius:var(--radius-md);transition:all var(--transition-fast);font-size:var(--font-size-sm);background:rgba(102,126,234,0.05);border:1px solid rgba(102,126,234,0.1);}.back-btn:hover{color:var(--primary-color);background:rgba(102,126,234,0.1);transform:translateX(-3px);}.form-tabs{display:flex;background:rgba(102,126,234,0.05);border-radius:var(--radius-lg);padding:4px;margin-bottom:var(--spacing-lg);position:relative;overflow:hidden;}.tab-btn{flex:1;background:transparent;border:none;padding:var(--spacing-md) var(--spacing-lg);border-radius:var(--radius-md);font-size:var(--font-size-base);font-weight:500;color:var(--text-secondary);cursor:pointer;transition:all var(--transition-normal);position:relative;z-index:2;}.tab-btn.active{background:var(--bg-white);color:var(--primary-color);box-shadow:var(--shadow-sm);}.tab-btn:hover:not(.active){color:var(--primary-color);background:rgba(255,255,255,0.5);}.login-form-wrapper,.register-form-wrapper{background:var(--bg-white);border-radius:var(--radius-xl);box-shadow:var(--shadow-xl);padding:var(--spacing-2xl) var(--spacing-xl);border:1px solid var(--border-color);transition:all var(--transition-normal);min-height:auto;}.register-form-wrapper{animation:slideInRight 0.3s ease-out;}.form-header{text-align:center;margin-bottom:var(--spacing-xl);position:relative;}.form-header::before{content:'';position:absolute;top:-20px;left:50%;transform:translateX(-50%);width:60px;height:4px;background:linear-gradient(90deg,var(--primary-color),var(--primary-light));border-radius:var(--radius-sm);animation:expandWidth 0.8s ease-out 0.4s both;}.form-header h3{font-size:var(--font-size-3xl);font-weight:700;color:var(--primary-color);background:linear-gradient(135deg,var(--primary-color),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:var(--spacing-sm);position:relative;animation:fadeInDown 0.6s ease-out;text-shadow:0 2px 4px rgba(102,126,234,0.1);}@supports not (-webkit-background-clip:text){.form-header h3{color:var(--primary-color);background:none;}}.form-header p{color:var(--text-secondary);font-size:var(--font-size-base);font-weight:500;opacity:0.8;animation:fadeInUp 0.6s ease-out 0.2s both;}